{"id":51379,"date":"2025-08-10T21:59:38","date_gmt":"2025-08-10T13:59:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51379.html"},"modified":"2025-08-10T21:59:38","modified_gmt":"2025-08-10T13:59:38","slug":"java%e7%bb%bc%e5%90%88%e9%a1%b9%e7%9b%ae%ef%bc%88%e4%b8%80%ef%bc%89%e4%b9%8b%e5%ad%a6%e7%94%9f%e7%ae%a1%e7%90%86%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51379.html","title":{"rendered":"Java\u7efc\u5408\u9879\u76ee\uff08\u4e00\uff09\u4e4b\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf"},"content":{"rendered":"<p>\u2003\u524d\u8a00&#xff1a;\u672c\u6b21\u9879\u76ee\u662f\u5bf9\u591a\u5929\u4ee5\u6765Java\u5b66\u4e60\u7684\u603b\u7ed3&#xff0c;\u9879\u76ee\u4e3b\u4f53\u5305\u542b\u4e24\u90e8\u5206&#xff0c;\u5206\u522b\u662f\u5b66\u751f\u767b\u5f55\u754c\u9762\u4ee5\u53ca\u5b66\u751f\u4fe1\u606f\u7ba1\u7406\u754c\u9762&#xff0c;\u4f7f\u7528ArrayList\u96c6\u5408\u5bf9\u6570\u636e\u8fdb\u884c\u5b58\u50a8\u3002\u603b\u4f53\u5305\u542bStudent\u548cUser\u4e24\u4e2aJavaBean\u7c7b\u548c\u4e24\u4e2a\u754c\u9762\u6d4b\u8bd5\u7c7b<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135935-6898a5c7f154b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u4e00\u3001\u53cc\u754c\u9762\u5c55\u793a<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c817aa9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c820e11.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u4e8c\u3001JavaBean\u7c7b<\/h3>\n<h4>\u5b66\u751f\u7c7b&#xff1a;<\/h4>\n<ul>\n<li>\u6210\u5458\u53d8\u91cf&#xff1a;id\u3001\u59d3\u540d\u3001\u5e74\u9f84\u3001\u5bb6\u5ead\u4f4f\u5740\u3002<\/li>\n<li>\u6784\u9020\u65b9\u6cd5&#xff1a;\u65e0\u53c2\u6784\u9020\u548c\u5e26\u56db\u4e2a\u53c2\u6570\u7684\u6784\u9020\u3002<\/li>\n<li>\u6210\u5458\u65b9\u6cd5&#xff1a;\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u5bf9\u5e94\u7ed9\u51faget\/set\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Student<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> id<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> address<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> id<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> address<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>id <span class=\"token operator\">&#061;<\/span> id<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">&#061;<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>address <span class=\"token operator\">&#061;<\/span> address<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> id<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> id<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>id <span class=\"token operator\">&#061;<\/span> id<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">getAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">&#061;<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getAddress<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> address<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setAddress<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> address<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>address <span class=\"token operator\">&#061;<\/span> address<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u7528\u6237\u7c7b&#xff1a;<\/h4>\n<ul>\n<li>\u200b\u5c5e\u6027&#xff1a;\u7528\u6237\u540d\u3001\u5bc6\u7801\u3001\u8eab\u4efd\u8bc1\u53f7\u7801\u3001\u624b\u673a\u53f7\u7801<\/li>\n<li>\u6784\u9020\u65b9\u6cd5&#xff1a;\u65e0\u53c2\u6784\u9020\u548c\u5e26\u56db\u4e2a\u53c2\u6570\u7684\u6784\u9020\u3002<\/li>\n<li>\u6210\u5458\u65b9\u6cd5&#xff1a;\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u5bf9\u5e94\u7ed9\u51faget\/set\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">User<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> username<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> password<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> personId<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> phoneNumber<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">User<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">User<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> username<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> password<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> personId<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> phoneNumber<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>username <span class=\"token operator\">&#061;<\/span> username<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>password <span class=\"token operator\">&#061;<\/span> password<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>personId <span class=\"token operator\">&#061;<\/span> personId<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>phoneNumber <span class=\"token operator\">&#061;<\/span> phoneNumber<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getUsername<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> username<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setUsername<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> username<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>username <span class=\"token operator\">&#061;<\/span> username<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getPassword<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> password<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setPassword<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> password<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>password <span class=\"token operator\">&#061;<\/span> password<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getPersonId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> personId<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setPersonId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> personId<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>personId <span class=\"token operator\">&#061;<\/span> personId<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getPhoneNumber<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> phoneNumber<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setPhoneNumber<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> phoneNumber<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>phoneNumber <span class=\"token operator\">&#061;<\/span> phoneNumber<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u4e09\u3001\u5b66\u751f\u767b\u5f55\u754c\u9762<\/h3>\n<p>\u9700\u6c42&#xff1a;<\/p>\n<ul>\n<li>\u4e3a\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u4e66\u5199\u4e00\u4e2a\u767b\u9646\u3001\u6ce8\u518c\u3001\u5fd8\u8bb0\u5bc6\u7801\u7684\u529f\u80fd\u3002<\/li>\n<li>\u53ea\u6709\u7528\u6237\u767b\u5f55\u6210\u529f\u4e4b\u540e&#xff0c;\u624d\u80fd\u8fdb\u5165\u5230\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u4e2d\u8fdb\u884c\u589e\u5220\u6539\u67e5\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h4>3.1 main()\u65b9\u6cd5<\/h4>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u4f7f\u7528sout\u8bed\u53e5\u5b8c\u6210\u5bf9\u767b\u5f55\u754c\u9762\u7684\u6784\u5efa\u3002<br \/>\n\u2003\u4f7f\u7528Scanner\u5bf9\u8c61\u8f93\u5165\u64cd\u4f5c\u9009\u9879\u3002<br \/>\n\u2003\u4f7f\u7528switch\u8bed\u53e5\u5b8c\u6210\u64cd\u4f5c\u7684\u9009\u62e9\u3002<br \/>\n\u2003\u4f7f\u7528\u5faa\u73af\u53cd\u590d\u64cd\u4f5c\u3002<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">User<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6b22\u8fce\u6765\u5230\u5b66\u751f\u7ba1\u7406\u767b\u5f55\u7cfb\u7edf&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u9009\u62e91.\u767b\u5f55 2.\u6ce8\u518c 3.\u5fd8\u8bb0\u5bc6\u7801 4.\u5173\u95ed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> choose <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">switch<\/span><span class=\"token punctuation\">(<\/span>choose<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;1&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">login<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;2&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;3&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">forgetPassword<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;4&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8c22\u8c22\u4f7f\u7528&#xff0c;\u518d\u89c1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">default<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u9009\u9879\u9519\u8bef&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.2\u6ce8\u518c\u529f\u80fdregister()\u65b9\u6cd5<\/h4>\n<p>\u9700\u6c42&#xff1a;<\/p>\n<li>\u7528\u6237\u540d\u9700\u8981\u6ee1\u8db3\u8981\u6c42&#xff1a; \u200b\u7528\u6237\u540d\u552f\u4e00&#xff1b; \u7528\u6237\u540d\u957f\u5ea6\u5fc5\u987b\u57283~15\u4f4d\u4e4b\u95f4&#xff1b;  \u200b\u53ea\u80fd\u662f\u5b57\u6bcd\u52a0\u6570\u5b57\u7684\u7ec4\u5408&#xff0c;\u4f46\u662f\u4e0d\u80fd\u662f\u7eaf\u6570\u5b57<\/li>\n<li>\u200b\u5bc6\u7801\u9700\u8981\u6ee1\u8db3\u8981\u6c42&#xff1a;\u952e\u76d8\u8f93\u5165\u4e24\u6b21&#xff0c;\u4e24\u6b21\u4e00\u81f4\u624d\u53ef\u4ee5\u8fdb\u884c\u6ce8\u518c\u3002<\/li>\n<li>\u8eab\u4efd\u8bc1\u53f7\u7801\u9700\u8981\u6ee1\u8db3\u8981\u6c42&#xff1a; \u957f\u5ea6\u4e3a18\u4f4d &#xff1b;\u4e0d\u80fd\u4ee50\u4e3a\u5f00\u5934 \u524d17\u4f4d&#xff0c;\u5fc5\u987b\u90fd\u662f\u6570\u5b57&#xff1b; \u6700\u4e3a\u4e00\u4f4d\u53ef\u4ee5\u662f\u6570\u5b57&#xff0c;\u4e5f\u53ef\u4ee5\u662f\u5927\u5199X\u6216\u5c0f\u5199x<\/li>\n<li>\u624b\u673a\u53f7\u9700\u8981\u6ee1\u8db3\u8981\u6c42&#xff1a; \u957f\u5ea6\u4e3a11\u4f4d &#xff1b;\u4e0d\u80fd\u4ee50\u4e3a\u5f00\u5934 &#xff1b;\u5fc5\u987b\u90fd\u662f\u6570\u5b57<\/li>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u521b\u5efa\u7528\u6237\u5bf9\u8c61\u548c\u626b\u63cf\u5668&#xff0c;\u7528\u4e8e\u63a5\u6536\u7528\u6237\u8f93\u5165\u5e76\u5b58\u50a8\u7528\u6237\u4fe1\u606f<br \/>\n\u2003\u5206\u6b65\u9aa4\u9a8c\u8bc1\u5e76\u83b7\u53d6\u7528\u6237\u4fe1\u606f&#xff1a;<br \/>\n\u2003\u2003\u9a8c\u8bc1\u7528\u6237\u540d\u683c\u5f0f\u53ca\u552f\u4e00\u6027&#xff0c;\u76f4\u5230\u8f93\u5165\u7b26\u5408\u8981\u6c42<br \/>\n\u2003\u2003\u9a8c\u8bc1\u4e24\u6b21\u8f93\u5165\u5bc6\u7801\u7684\u4e00\u81f4\u6027&#xff0c;\u76f4\u5230\u8f93\u5165\u4e00\u81f4<br \/>\n\u2003\u2003\u9a8c\u8bc1\u8eab\u4efd\u8bc1\u683c\u5f0f&#xff0c;\u76f4\u5230\u8f93\u5165\u7b26\u5408\u8981\u6c42<br \/>\n\u2003\u2003\u9a8c\u8bc1\u624b\u673a\u53f7\u683c\u5f0f&#xff0c;\u76f4\u5230\u8f93\u5165\u7b26\u5408\u8981\u6c42<br \/>\n\u2003\u6240\u6709\u4fe1\u606f\u9a8c\u8bc1\u901a\u8fc7\u540e&#xff0c;\u63d0\u793a\u6ce8\u518c\u6210\u529f<br \/>\n\u2003\u5c06\u65b0\u7528\u6237\u6dfb\u52a0\u5230\u7528\u6237\u5217\u8868\u4e2d<\/p>\n<p> <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">User<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">User<\/span> u <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">User<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5224\u65ad\u7528\u6237\u540d<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u7528\u6237\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> username <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5148\u5224\u65ad\u5408\u6cd5&#xff0c;\u5728\u5224\u65ad\u552f\u4e00<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkUserName<\/span><span class=\"token punctuation\">(<\/span>username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u683c\u5f0f\u4e0d\u6ee1\u8db3\u6761\u4ef6&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag2 <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span> username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>flag2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u7528\u6237\u540d\u5df2\u5b58\u5728,\u91cd\u65b0\u8f93\u5165<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7528\u6237\u540d&#034;<\/span> <span class=\"token operator\">&#043;<\/span> username <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u5df2\u5b58\u5728&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7528\u6237\u540d&#034;<\/span> <span class=\"token operator\">&#043;<\/span> username <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u8f93\u5165\u6210\u529f&#034;<\/span> <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                u<span class=\"token punctuation\">.<\/span><span class=\"token function\">setUsername<\/span><span class=\"token punctuation\">(<\/span>username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5224\u65ad\u5bc6\u7801<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u5bc6\u7801&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> password1 <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u518d\u6b21\u8f93\u5165\u5bc6\u7801&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> password2 <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkPassword<\/span><span class=\"token punctuation\">(<\/span>password1<span class=\"token punctuation\">,<\/span>password2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5bc6\u7801\u4e0d\u4e00\u81f4&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                u<span class=\"token punctuation\">.<\/span><span class=\"token function\">setPassword<\/span><span class=\"token punctuation\">(<\/span>password1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5bc6\u7801\u4e00\u81f4&#xff0c;\u8f93\u5165\u5176\u4ed6\u6570\u636e&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5224\u65ad\u8eab\u4efd\u8bc1<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u8eab\u4efd\u8bc1&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> personId <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkPersonId<\/span><span class=\"token punctuation\">(<\/span>personId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8eab\u4efd\u8bc1\u53f7\u7801\u6ee1\u8db3\u8981\u6c42&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                u<span class=\"token punctuation\">.<\/span><span class=\"token function\">setPersonId<\/span><span class=\"token punctuation\">(<\/span>personId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8eab\u4efd\u8bc1\u683c\u5f0f\u9519\u8bef&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5224\u65ad\u624b\u673a\u53f7<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u624b\u673a\u53f7&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> phoneNumber <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkPhoneNumber<\/span><span class=\"token punctuation\">(<\/span>phoneNumber<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u624b\u673a\u683c\u5f0f\u6b63\u786e&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                u<span class=\"token punctuation\">.<\/span><span class=\"token function\">setPhoneNumber<\/span><span class=\"token punctuation\">(<\/span>phoneNumber<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u624b\u673a\u53f7\u683c\u5f0f\u9519\u8bef&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6ce8\u518c\u6210\u529f!&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        list<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>u<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u904d\u5386\u96c6\u5408<\/span><br \/>\n        <span class=\"token function\">printList<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.3\u767b\u5f55\u529f\u80fdlogin()\u65b9\u6cd5<\/h4>\n<p>\u9700\u6c42&#xff1a;<\/p>\n<ul>\n<li>\u952e\u76d8\u5f55\u5165\u7528\u6237\u540d\u3001\u5bc6\u7801\u3001\u9a8c\u8bc1\u7801<\/li>\n<li>\u200b\u7528\u6237\u540d\u5982\u679c\u672a\u6ce8\u518c&#xff0c;\u76f4\u63a5\u7ed3\u675f\u65b9\u6cd5&#xff0c;\u5e76\u63d0\u793a&#xff1a;\u7528\u6237\u540d\u672a\u6ce8\u518c&#xff0c;\u8bf7\u5148\u6ce8\u518c<\/li>\n<li>\u200b\u5224\u65ad\u9a8c\u8bc1\u7801\u662f\u5426\u6b63\u786e&#xff0c;\u5982\u4e0d\u6b63\u786e&#xff0c;\u91cd\u65b0\u8f93\u5165<\/li>\n<li>\u200b\u518d\u5224\u65ad\u7528\u6237\u540d\u548c\u5bc6\u7801\u662f\u5426\u6b63\u786e&#xff0c;\u67093\u6b21\u673a\u4f1a<\/li>\n<\/ul>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u6700\u591a\u63d0\u4f9b 3 \u6b21\u767b\u5f55\u673a\u4f1a&#xff0c;\u901a\u8fc7 for \u5faa\u73af\u63a7\u5236<br \/>\n\u2003\u6bcf\u6b21\u767b\u5f55\u6d41\u7a0b&#xff1a;<br \/>\n\u2003\u2003\u8f93\u5165\u7528\u6237\u540d&#xff0c;\u68c0\u67e5\u662f\u5426\u5df2\u6ce8\u518c&#xff0c;\u672a\u6ce8\u518c\u5219\u76f4\u63a5\u8fd4\u56de<br \/>\n\u2003\u2003\u8f93\u5165\u5bc6\u7801\u540e&#xff0c;\u751f\u6210\u5e76\u9a8c\u8bc1\u9a8c\u8bc1\u7801&#xff08;\u5ffd\u7565\u5927\u5c0f\u5199&#xff09;&#xff0c;\u76f4\u5230\u8f93\u5165\u6b63\u786e<br \/>\n\u2003\u2003\u5c06\u7528\u6237\u540d\u548c\u5bc6\u7801\u5c01\u88c5\u6210 User \u5bf9\u8c61&#xff0c;\u9a8c\u8bc1\u4e0e\u5217\u8868\u4e2d\u5b58\u50a8\u7684\u4fe1\u606f\u662f\u5426\u5339\u914d<br \/>\n\u2003\u9a8c\u8bc1\u901a\u8fc7\u5219\u63d0\u793a\u767b\u5f55\u6210\u529f&#xff0c;\u542f\u52a8\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf<br \/>\n\u2003\u9a8c\u8bc1\u5931\u8d25\u5219\u63d0\u793a\u9519\u8bef&#xff0c;\u82e5 3 \u6b21\u90fd\u5931\u8d25\u5219\u9501\u5b9a\u8d26\u53f7\u5e76\u8fd4\u56de&#xff0c;\u5426\u5219\u663e\u793a\u5269\u4f59\u5c1d\u8bd5\u6b21\u6570<\/p>\n<p><span class=\"token comment\">\/\/\u767b\u5f55\u529f\u80fd<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">login<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">User<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u7528\u6237\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> username <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5224\u65ad\u7528\u6237\u540d\u662f\u5426\u5b58\u5728<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7528\u6237\u540d&#034;<\/span> <span class=\"token operator\">&#043;<\/span> username <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u672a\u6ce8\u518c&#xff0c;\u8bf7\u5148\u6ce8\u518c\u518d\u767b\u5f55&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u5bc6\u7801&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> password <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">String<\/span> rightCode <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getCode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u9a8c\u8bc1\u7801(&#034;<\/span> <span class=\"token operator\">&#043;<\/span> rightCode <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token class-name\">String<\/span> <span class=\"token class-name\">Code<\/span> <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/\u5ffd\u7565\u5927\u5c0f\u5199<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Code<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">equalsIgnoreCase<\/span><span class=\"token punctuation\">(<\/span>rightCode<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u9a8c\u8bc1\u7801\u6b63\u786e&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u9a8c\u8bc1\u7801\u9519\u8bef&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token comment\">\/\/\u9a8c\u8bc1\u7528\u6237\u540d\u548c\u5bc6\u7801<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\u9a8c\u8bc1\u7528\u6237\u540d\u548c\u5bc6\u7801\u662f\u5426\u6b63\u786e<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/\u5c01\u88c5\u601d\u60f3\u7684\u5e94\u7528&#xff1a;<\/span><br \/>\n            <span class=\"token comment\">\/\/\u53ef\u4ee5\u628a\u4e00\u4e9b\u96f6\u6563\u7684\u6570\u636e&#xff0c;\u5c01\u88c5\u6210\u4e00\u4e2a\u5bf9\u8c61<\/span><br \/>\n            <span class=\"token comment\">\/\/\u4ee5\u540e\u4f20\u9012\u53c2\u6570\u7684\u65f6\u5019&#xff0c;\u53ea\u8981\u4f20\u9012\u4e00\u4e2a\u6574\u4f53\u5c31\u53ef\u4ee5\u4e86&#xff0c;\u4e0d\u9700\u8981\u7ba1\u8fd9\u4e9b\u96f6\u6563\u7684\u6570\u636e<\/span><br \/>\n            <span class=\"token class-name\">User<\/span> userInfo <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">User<\/span><span class=\"token punctuation\">(<\/span>username<span class=\"token punctuation\">,<\/span>password<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkUserInfo<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>userInfo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u767b\u5f55\u6210\u529f&#xff0c;\u53ef\u4ee5\u5f00\u59cb\u4f7f\u7528\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/\u521b\u5efa\u5bf9\u8c61\u8c03\u7528\u65b9\u6cd5&#xff0c;\u542f\u52a8\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf<\/span><br \/>\n                <span class=\"token class-name\">StudentSystem<\/span> ss <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">StudentSystem<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                ss<span class=\"token punctuation\">.<\/span><span class=\"token function\">startStudentSystem<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u767b\u5f55\u5931\u8d25&#xff0c;\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5f53\u524d\u8d26\u53f7&#034;<\/span> <span class=\"token operator\">&#043;<\/span> username <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u88ab\u9501\u5b9a&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef&#xff0c;\u8fd8\u5269\u4e0b&#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token operator\">&#8211;<\/span>i<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u6b21\u673a\u4f1a&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.4\u5fd8\u8bb0\u5bc6\u7801\u529f\u80fdforgetPassword()\u65b9\u6cd5<\/h4>\n<p>\u9700\u6c42&#xff1a;<\/p>\n<ul>\n<li>\u952e\u76d8\u5f55\u5165\u7528\u6237\u540d&#xff0c;\u5224\u65ad\u5f53\u524d\u7528\u6237\u540d\u662f\u5426\u5b58\u5728&#xff0c;\u5982\u4e0d\u5b58\u5728&#xff0c;\u76f4\u63a5\u7ed3\u675f\u65b9\u6cd5&#xff0c;\u5e76\u63d0\u793a&#xff1a;\u672a\u6ce8\u518c<\/li>\n<li>\u952e\u76d8\u5f55\u5165\u8eab\u4efd\u8bc1\u53f7\u7801\u548c\u624b\u673a\u53f7\u7801<\/li>\n<li>\u5224\u65ad\u5f53\u524d\u7528\u6237\u7684\u8eab\u4efd\u8bc1\u53f7\u7801\u548c\u624b\u673a\u53f7\u7801\u662f\u5426\u4e00\u81f4&#xff0c; \u5982\u679c\u4e00\u81f4&#xff0c;\u5219\u63d0\u793a\u8f93\u5165\u5bc6\u7801&#xff0c;\u8fdb\u884c\u4fee\u6539\u3002 \u5982\u679c\u4e0d\u4e00\u81f4&#xff0c;\u5219\u63d0\u793a&#xff1a;\u8d26\u53f7\u4fe1\u606f\u4e0d\u5339\u914d&#xff0c;\u4fee\u6539\u5931\u8d25\u3002<\/li>\n<\/ul>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u8f93\u5165\u7528\u6237\u540d&#xff0c;\u68c0\u67e5\u662f\u5426\u5df2\u6ce8\u518c&#xff0c;\u672a\u6ce8\u518c\u5219\u76f4\u63a5\u8fd4\u56de<br \/>\n\u2003\u9a8c\u8bc1\u8eab\u4efd&#xff1a;\u8f93\u5165\u8eab\u4efd\u8bc1\u53f7\u548c\u624b\u673a\u53f7&#xff0c;\u4e0e\u8be5\u7528\u6237\u6ce8\u518c\u65f6\u7684\u4fe1\u606f\u6bd4\u5bf9<br \/>\n\u2003\u4fe1\u606f\u9a8c\u8bc1\u901a\u8fc7\u540e&#xff0c;\u8fdb\u5165\u5bc6\u7801\u4fee\u6539\u6d41\u7a0b&#xff1a;<br \/>\n\u2003\u2003\u8f93\u5165\u65b0\u5bc6\u7801\u5e76\u518d\u6b21\u786e\u8ba4<br \/>\n\u2003\u2003\u4e24\u6b21\u8f93\u5165\u4e00\u81f4\u5219\u66f4\u65b0\u5bc6\u7801&#xff0c;\u5426\u5219\u91cd\u65b0\u8f93\u5165<br \/>\n\u2003\u5bc6\u7801\u4fee\u6539\u6210\u529f\u540e\u7ed9\u51fa\u63d0\u793a<\/p>\n<p><span class=\"token comment\">\/\/\u5fd8\u8bb0\u5bc6\u7801<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">forgetPassword<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">User<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u7528\u6237\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> username <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5f53\u524d\u7528\u6237&#034;<\/span> <span class=\"token operator\">&#043;<\/span> username <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u672a\u6ce8\u518c&#xff0c;\u8bf7\u5148\u6ce8\u518c&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/\u952e\u76d8\u5f55\u5165\u8eab\u4efd\u8bc1\u548c\u624b\u673a\u53f7<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u8eab\u4efd\u8bc1\u53f7\u7801&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> personId <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u624b\u673a\u53f7&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> phoneNumber <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/\u9700\u8981\u628a\u7528\u6237\u5bf9\u8c61\u901a\u8fc7\u7d22\u5f15\u5148\u83b7\u53d6\u51fa\u6765<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> index <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">findIndex<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">User<\/span> user <span class=\"token operator\">&#061;<\/span> list<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>index<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u6bd4\u8f83\u7528\u6237\u5bf9\u8c61\u4e2d\u7684\u624b\u673a\u53f7\u7801\u548c\u8eab\u4efd\u8bc1\u662f\u5426\u76f8\u540c<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span>user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPersonId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">equalsIgnoreCase<\/span><span class=\"token punctuation\">(<\/span>personId<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPhoneNumber<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">equals<\/span><span class=\"token punctuation\">(<\/span>phoneNumber<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8eab\u4efd\u8bc1\u6216\u624b\u673a\u8f93\u5165\u6709\u8bef&#xff0c;\u4e0d\u80fd\u4fee\u6539&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/\u5f53\u4ee3\u7801\u6267\u884c\u5230\u8fd9\u91cc&#xff0c;\u8868\u793a\u6240\u6709\u7684\u6570\u636e\u5168\u90e8\u9a8c\u8bc1\u6210\u529f&#xff0c;\u53ef\u4ee5\u4fee\u6539<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u65b0\u7684\u5bc6\u7801&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> password <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u518d\u6b21\u8f93\u5165\u65b0\u7684\u5bc6\u7801&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> againPassword <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkPassword<\/span><span class=\"token punctuation\">(<\/span>password<span class=\"token punctuation\">,<\/span>againPassword<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8f93\u5165\u4e00\u81f4&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                user<span class=\"token punctuation\">.<\/span><span class=\"token function\">setPassword<\/span><span class=\"token punctuation\">(<\/span>password<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u4e24\u6b21\u5bc6\u7801\u8f93\u5165\u4e0d\u4e00\u81f4&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5bc6\u7801\u4fee\u6539\u6210\u529f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u56db\u3001\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u754c\u9762<\/h3>\n<p>\u9700\u6c42&#xff1a;<\/p>\n<ul>\n<li>\u91c7\u53d6\u63a7\u5236\u53f0\u7684\u65b9\u5f0f\u53bb\u4e66\u5199\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u3002<\/li>\n<\/ul>\n<h4>4.1 startStudentSystem()\u65b9\u6cd5<\/h4>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u4f7f\u7528sout\u8bed\u53e5\u5b8c\u6210\u5bf9\u767b\u5f55\u754c\u9762\u7684\u6784\u5efa\u3002<br \/>\n\u2003\u4f7f\u7528Scanner\u5bf9\u8c61\u8f93\u5165\u64cd\u4f5c\u9009\u9879\u3002<br \/>\n\u2003\u4f7f\u7528switch\u8bed\u53e5\u5b8c\u6210\u64cd\u4f5c\u7684\u9009\u62e9\u3002<br \/>\n\u2003\u4f7f\u7528\u5faa\u73af\u53cd\u590d\u64cd\u4f5c\u3002<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">startStudentSystem<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list  <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&#8212;&#8212;&#8212;&#8212;-\u6b22\u8fce\u6765\u5230\u9ed1\u9a6c\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf&#8212;&#8212;&#8212;&#8212;&#8212;-&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;1&#xff1a;\u6dfb\u52a0\u5b66\u751f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;2&#xff1a;\u5220\u9664\u5b66\u751f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;3&#xff1a;\u4fee\u6539\u5b66\u751f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;4&#xff1a;\u67e5\u8be2\u5b66\u751f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;5&#xff1a;\u9000\u51fa&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u60a8\u7684\u9009\u62e9:&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> choose <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>choose<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;1&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">addStudent<\/span><span class=\"token punctuation\">(<\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;2&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">deleteStudent<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;3&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">updateStudent<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;4&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">queryStudent<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">case<\/span> <span class=\"token string\">&#034;5&#034;<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">default<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6ca1\u6709\u8fd9\u4e2a\u9009\u9879&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.2 \u6dfb\u52a0\u529f\u80fd&#xff1a;<\/h4>\n<p>\u200b\u952e\u76d8\u5f55\u5165\u6bcf\u4e00\u4e2a\u5b66\u751f\u4fe1\u606f\u5e76\u6dfb\u52a0&#xff0c;\u9700\u8981\u6ee1\u8db3\u4ee5\u4e0b\u8981\u6c42&#xff1a;<\/p>\n<ul>\n<li>id\u552f\u4e00<\/li>\n<\/ul>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u521b\u5efa\u5b66\u751f\u5bf9\u8c61\u548c\u626b\u63cf\u5668&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5b66\u751f\u4fe1\u606f\u548c\u63a5\u6536\u8f93\u5165<br \/>\n\u2003\u9a8c\u8bc1\u5e76\u8bbe\u7f6e\u5b66\u751f ID&#xff1a;<br \/>\n\u2003\u2003\u5faa\u73af\u8f93\u5165 ID&#xff0c;\u68c0\u67e5\u662f\u5426\u5df2\u5b58\u5728<br \/>\n\u2003\u2003\u82e5 ID\u5df2\u5b58\u5728\u5219\u63d0\u793a\u91cd\u65b0\u8f93\u5165&#xff0c;\u5426\u5219\u8bbe\u7f6e\u8be5 ID \u5e76\u9000\u51fa\u5faa\u73af<br \/>\n\u2003\u4f9d\u6b21\u8f93\u5165\u5e76\u8bbe\u7f6e\u5b66\u751f\u7684\u59d3\u540d\u3001\u5e74\u9f84\u3001\u5bb6\u5ead\u5730\u5740<br \/>\n\u2003\u5c06\u5b8c\u6574\u7684\u5b66\u751f\u5bf9\u8c61\u6dfb\u52a0\u5230\u5217\u8868\u4e2d&#xff0c;\u63d0\u793a\u6dfb\u52a0\u6210\u529f<\/p>\n<p><span class=\"token comment\">\/\/\u6dfb\u52a0\u5b66\u751f<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">addStudent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Student<\/span> stu <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165id&#xff1a;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> id <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">boolean<\/span> flag <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>flag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u8868\u793aid\u5df2\u7ecf\u5b58\u5728&#xff0c;\u9700\u8981\u91cd\u65b0\u5f55\u5165<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id\u5df2\u7ecf\u5b58\u5728&#xff0c;\u8bf7\u91cd\u65b0\u5f55\u5165&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setId<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u59d3\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u5e74\u9f84&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">nextInt<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u5bb6\u5ead\u5730\u5740&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> address <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setAddress<\/span><span class=\"token punctuation\">(<\/span>address<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        list<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>stu<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6dfb\u52a0\u6210\u529f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.3\u5220\u9664\u529f\u80fd&#xff1a;<\/h4>\n<p>\u200b\u952e\u76d8\u5f55\u5165\u8981\u5220\u9664\u7684\u5b66\u751fid&#xff0c;\u9700\u8981\u6ee1\u8db3\u4ee5\u4e0b\u8981\u6c42&#xff1a;<\/p>\n<ul>\n<li>id\u5b58\u5728\u5220\u9664<\/li>\n<li>id\u4e0d\u5b58\u5728&#xff0c;\u9700\u8981\u63d0\u793a\u4e0d\u5b58\u5728&#xff0c;\u5e76\u56de\u5230\u521d\u59cb\u83dc\u5355<\/li>\n<\/ul>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u63a5\u6536\u7528\u6237\u8f93\u5165\u7684\u8981\u5220\u9664\u7684\u5b66\u751f ID<br \/>\n\u2003\u67e5\u8be2\u8be5 ID \u5728\u5b66\u751f\u5217\u8868\u4e2d\u7684\u7d22\u5f15\u4f4d\u7f6e<br \/>\n\u2003\u6839\u636e\u7d22\u5f15\u5224\u65ad\u64cd\u4f5c&#xff1a;<br \/>\n\u2003\u2003\u82e5\u7d22\u5f15\u6709\u6548&#xff08;\u5b58\u5728\u8be5\u5b66\u751f&#xff09;&#xff0c;\u5219\u4ece\u5217\u8868\u4e2d\u5220\u9664\u8be5\u5b66\u751f\u5e76\u63d0\u793a\u6210\u529f<br \/>\n\u2003\u2003\u82e5\u7d22\u5f15\u65e0\u6548&#xff08;\u4e0d\u5b58\u5728\u8be5\u5b66\u751f&#xff09;&#xff0c;\u5219\u63d0\u793a\u5220\u9664\u5931\u8d25<\/p>\n<p><span class=\"token comment\">\/\/\u5220\u9664\u5b66\u751f<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">deleteStudent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u8981\u5220\u9664\u7684id&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> id <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u67e5\u8be2id\u5728\u96c6\u5408\u4e2d\u7684\u7d22\u5f15<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> index <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getIndex<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5bf9id\u8fdb\u884c\u5224\u65ad<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5982\u679c-1&#xff0c;\u5c31\u8868\u793a\u4e0d\u5b58\u5728&#xff0c;\u7ed3\u675f\u65b9\u6cd5&#xff0c;\u56de\u5230\u521d\u59cb\u83dc\u5355<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5982\u679c\u5927\u4e8e\u7b49\u4e8e0\u7684&#xff0c;\u8868\u793a\u5b58\u5728&#xff0c;\u76f4\u63a5\u5220\u9664<\/span><br \/>\n            list<span class=\"token punctuation\">.<\/span><span class=\"token function\">remove<\/span><span class=\"token punctuation\">(<\/span>index<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id\u4e3a&#034;<\/span> <span class=\"token operator\">&#043;<\/span> id <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u7684\u5b66\u751f\u5220\u9664\u6210\u529f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id\u4e0d\u5b58\u5728&#xff0c;\u5220\u9664\u5931\u8d25&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.4\u4fee\u6539\u529f\u80fd&#xff1a;<\/h4>\n<p>\u200b\u952e\u76d8\u5f55\u5165\u8981\u4fee\u6539\u7684\u5b66\u751fid&#xff0c;\u9700\u8981\u6ee1\u8db3\u4ee5\u4e0b\u8981\u6c42<\/p>\n<ul>\n<li>id\u5b58\u5728&#xff0c;\u7ee7\u7eed\u5f55\u5165\u5176\u4ed6\u4fe1\u606f<\/li>\n<li>id\u4e0d\u5b58\u5728&#xff0c;\u9700\u8981\u63d0\u793a\u4e0d\u5b58\u5728&#xff0c;\u5e76\u56de\u5230\u521d\u59cb\u83dc\u5355<\/li>\n<\/ul>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u63a5\u6536\u7528\u6237\u8f93\u5165\u7684\u8981\u4fee\u6539\u7684\u5b66\u751f ID<br \/>\n\u2003\u67e5\u8be2\u8be5 ID \u5728\u5b66\u751f\u5217\u8868\u4e2d\u7684\u7d22\u5f15\u4f4d\u7f6e<br \/>\n\u2003\u6839\u636e\u7d22\u5f15\u5224\u65ad\u64cd\u4f5c&#xff1a;<br \/>\n\u2003\u2003\u82e5\u7d22\u5f15\u65e0\u6548&#xff08;\u4e0d\u5b58\u5728\u8be5\u5b66\u751f&#xff09;&#xff0c;\u63d0\u793a\u4fee\u6539\u5931\u8d25\u5e76\u7ed3\u675f<br \/>\n\u2003\u2003\u82e5\u7d22\u5f15\u6709\u6548&#xff08;\u5b58\u5728\u8be5\u5b66\u751f&#xff09;&#xff0c;\u5219\u4f9d\u6b21\u8f93\u5165\u4fee\u6539\u540e\u7684\u59d3\u540d\u3001\u5e74\u9f84\u3001\u5bb6\u5ead\u5730\u5740<br \/>\n\u2003\u521b\u5efa\u65b0\u5b66\u751f\u5bf9\u8c61\u5e76\u8bbe\u7f6e\u4fee\u6539\u540e\u7684\u4fe1\u606f&#xff08;\u4fdd\u6301\u539f ID&#xff09;&#xff0c;\u66ff\u6362\u5217\u8868\u4e2d\u5bf9\u5e94\u4f4d\u7f6e\u7684\u5b66\u751f\u4fe1\u606f<\/p>\n<p><span class=\"token comment\">\/\/\u4fee\u6539\u5b66\u751f<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">updateStudent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Student<\/span> stu <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Scanner<\/span> sc <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Scanner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>in<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u8981\u4fee\u6539\u7684id&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> id <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u67e5\u8be2id\u5728\u96c6\u5408\u4e2d\u7684\u7d22\u5f15<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> index <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getIndex<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">,<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5bf9id\u8fdb\u884c\u5224\u65ad<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5982\u679c-1&#xff0c;\u5c31\u8868\u793a\u4e0d\u5b58\u5728&#xff0c;\u7ed3\u675f\u65b9\u6cd5&#xff0c;\u56de\u5230\u521d\u59cb\u83dc\u5355<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5982\u679c\u5927\u4e8e\u7b49\u4e8e0\u7684&#xff0c;\u8868\u793a\u5b58\u5728&#xff0c;\u4fee\u6539<\/span><br \/>\n            <span class=\"token comment\">\/\/list.set(index,);<\/span><\/p>\n<p>            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u4fee\u6539\u540e\u7684\u59d3\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u4fee\u6539\u540e\u7684\u5e74\u9f84&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">nextInt<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u4fee\u6539\u540e\u7684\u5bb6\u5ead\u5730\u5740&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> address <span class=\"token operator\">&#061;<\/span> sc<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setId<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">setAddress<\/span><span class=\"token punctuation\">(<\/span>address<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            list<span class=\"token punctuation\">.<\/span><span class=\"token function\">set<\/span><span class=\"token punctuation\">(<\/span>index<span class=\"token punctuation\">,<\/span>stu<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/Student stu &#061; list.get(index)\u53ef\u76f4\u63a5\u4fee\u6539<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id\u4e3a&#034;<\/span> <span class=\"token operator\">&#043;<\/span> id <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u7684\u5b66\u751f\u4fee\u6539\u6210\u529f&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">else<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token operator\">&#043;<\/span>id<span class=\"token operator\">&#043;<\/span><span class=\"token string\">&#034;\u4e0d\u5b58\u5728&#xff0c;\u4fee\u6539\u5931\u8d25&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.5\u67e5\u8be2\u529f\u80fd&#xff1a;<\/h4>\n<p>\u200b\u6253\u5370\u6240\u6709\u7684\u5b66\u751f\u4fe1\u606f&#xff0c;\u9700\u8981\u6ee1\u8db3\u4ee5\u4e0b\u8981\u6c42<\/p>\n<ul>\n<li>\u5982\u679c\u6ca1\u6709\u5b66\u751f\u4fe1\u606f&#xff0c;\u63d0\u793a&#xff1a;\u5f53\u524d\u65e0\u5b66\u751f\u4fe1\u606f&#xff0c;\u8bf7\u6dfb\u52a0\u540e\u518d\u67e5\u8be2<\/li>\n<li>\u5982\u679c\u6709\u5b66\u751f\u4fe1\u606f&#xff0c;\u9700\u8981\u8f93\u51fa\u3002<\/li>\n<\/ul>\n<p>\u601d\u8def&#xff1a;<br \/>\n\u2003\u5148\u68c0\u67e5\u5b66\u751f\u5217\u8868\u662f\u5426\u4e3a\u7a7a&#xff0c;\u82e5\u4e3a\u7a7a\u5219\u63d0\u793a\u7528\u6237\u6dfb\u52a0\u540e\u518d\u67e5\u8be2\u5e76\u8fd4\u56de<br \/>\n\u2003\u82e5\u5217\u8868\u6709\u6570\u636e&#xff0c;\u5148\u6253\u5370\u8868\u5934&#xff08;id\u3001\u59d3\u540d\u3001\u5e74\u9f84\u3001\u5bb6\u5ead\u5730\u5740&#xff09;<br \/>\n\u2003\u904d\u5386\u5b66\u751f\u5217\u8868&#xff0c;\u4f9d\u6b21\u83b7\u53d6\u6bcf\u4e2a\u5b66\u751f\u5bf9\u8c61\u7684\u4fe1\u606f\u5e76\u6309\u683c\u5f0f\u8f93\u51fa<br \/>\n\u2003 \u5b8c\u6210\u6240\u6709\u5b66\u751f\u4fe1\u606f\u7684\u5c55\u793a<\/p>\n<p><span class=\"token comment\">\/\/\u67e5\u8be2\u5b66\u751f<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">queryStudent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Student<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> list<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/\u6ca1\u6709\u5b66\u751f\u4fe1\u606f\u65f6<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>list<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5f53\u524d\u65e0\u5b66\u751f\u4fe1\u606f&#xff0c;\u8bf7\u6dfb\u52a0\u540e\u518d\u67e5\u8be2&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/\/\u8df3\u51fa<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id\\\\t\\\\t\u59d3\u540d\\\\t\u5e74\u9f84\\\\t\u5bb6\u5ead\u5730\u5740&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> list<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">Student<\/span> stu <span class=\"token operator\">&#061;<\/span> list<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">getId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\\\\t&#034;<\/span> <span class=\"token operator\">&#043;<\/span> stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\\\\t&#034;<\/span> <span class=\"token operator\">&#043;<\/span> stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\\\\t&#034;<\/span> <span class=\"token operator\">&#043;<\/span>stu<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAddress<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u4e94\u3001\u529f\u80fd\u6d4b\u8bd5<\/h3>\n<h4>1.\u767b\u5f55\u7cfb\u7edf<\/h4>\n<h5>1.1\u6ce8\u518c\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c82c626.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h5>1.2\u767b\u5f55\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c83f361.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h5>1.3\u5fd8\u8bb0\u5bc6\u7801\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c85d3da.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h4>2.\u5b66\u751f\u4fe1\u606f\u7ba1\u7406\u754c\u9762<\/h4>\n<h5>2.1\u6dfb\u52a0\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c878702.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h5>2.2\u67e5\u8be2\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c8ae1e3.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h5>2.3\u5220\u9664\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135936-6898a5c8c3da1.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h5>2.4\u4fee\u6539\u529f\u80fd<\/h5>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810135937-6898a5c914bd4.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" 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