{"id":75897,"date":"2026-02-13T12:58:01","date_gmt":"2026-02-13T04:58:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75897.html"},"modified":"2026-02-13T12:58:01","modified_gmt":"2026-02-13T04:58:01","slug":"spring-%e6%b3%a8%e8%a7%a3%e8%af%a6%e8%a7%a3%ef%bc%9a%e4%bb%8e%e5%ae%b9%e5%99%a8%e9%85%8d%e7%bd%ae%e5%88%b0%e4%be%9d%e8%b5%96%e6%b3%a8%e5%85%a5%e7%9a%84%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75897.html","title":{"rendered":"Spring \u6ce8\u89e3\u8be6\u89e3\uff1a\u4ece\u5bb9\u5668\u914d\u7f6e\u5230\u4f9d\u8d56\u6ce8\u5165\u7684\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>Spring \u6ce8\u89e3\u8be6\u89e3&#xff1a;\u4ece\u5bb9\u5668\u914d\u7f6e\u5230\u4f9d\u8d56\u6ce8\u5165\u7684\u6700\u4f73\u5b9e\u8df5<\/li>\n<li>\n<ul>\n<li>\u4e00\u3001\u57fa\u4e8e\u6ce8\u89e3\u7684\u5bb9\u5668\u914d\u7f6e<\/li>\n<li>\n<ul>\n<li>1. \u542f\u7528\u6ce8\u89e3\u652f\u6301<\/li>\n<li>\n<ul>\n<li>\u65b9\u5f0f\u4e00&#xff1a;Java Config&#xff08;\u63a8\u8350&#xff09;<\/li>\n<li>\u65b9\u5f0f\u4e8c&#xff1a;XML \u914d\u7f6e&#xff08;\u9057\u7559&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>2. \u6838\u5fc3\u6ce8\u89e3\u5206\u7c7b<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001\u7ec4\u4ef6\u58f0\u660e\u6ce8\u89e3&#xff1a;&#096;&#064;Component&#096; \u53ca\u5176\u6d3e\u751f\u6ce8\u89e3<\/li>\n<li>\n<ul>\n<li>1. &#096;&#064;Component&#096;&#xff1a;\u901a\u7528\u7ec4\u4ef6<\/li>\n<li>2. \u8bed\u4e49\u5316\u6d3e\u751f\u6ce8\u89e3&#xff08;\u529f\u80fd\u76f8\u540c&#xff0c;\u8bed\u4e49\u4e0d\u540c&#xff09;<\/li>\n<li>\n<ul>\n<li>\u793a\u4f8b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u4f9d\u8d56\u6ce8\u5165\u6ce8\u89e3<\/li>\n<li>\n<ul>\n<li>1. &#096;&#064;Autowired&#096;&#xff1a;\u81ea\u52a8\u88c5\u914d\u4f9d\u8d56<\/li>\n<li>2. &#096;&#064;Qualifier&#096;&#xff1a;\u89e3\u51b3\u591a\u5b9e\u73b0\u6b67\u4e49<\/li>\n<li>3. &#096;&#064;Required&#096;&#xff1a;\u5df2\u5e9f\u5f03&#xff0c;\u4e0d\u518d\u63a8\u8350\u4f7f\u7528<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848<\/li>\n<li>\n<ul>\n<li>\u274c \u95ee\u9898 1&#xff1a;&#096;NoSuchBeanDefinitionException&#096;<\/li>\n<li>\u274c \u95ee\u9898 2&#xff1a;\u5b57\u6bb5\u6ce8\u5165\u5bfc\u81f4\u5355\u5143\u6d4b\u8bd5\u56f0\u96be<\/li>\n<li>\u274c \u95ee\u9898 3&#xff1a;&#096;&#064;Repository&#096; \u672a\u751f\u6548&#xff0c;\u6570\u636e\u5e93\u5f02\u5e38\u672a\u8f6c\u6362<\/li>\n<li>\u274c \u95ee\u9898 4&#xff1a;\u5faa\u73af\u4f9d\u8d56\u5bfc\u81f4\u542f\u52a8\u5931\u8d25<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001\u6700\u4f73\u5b9e\u8df5\u4e0e\u6ce8\u610f\u4e8b\u9879<\/li>\n<li>\n<ul>\n<li>\u2705 \u63a8\u8350\u505a\u6cd5<\/li>\n<li>\u26a0\ufe0f \u6ce8\u610f\u4e8b\u9879<\/li>\n<\/ul>\n<\/li>\n<li>\u516d\u3001\u603b\u7ed3<\/li>\n<li>&#x1f4a1;\u4e0a\u5468\u7cbe\u5f69\u56de\u987e<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Spring \u6ce8\u89e3\u8be6\u89e3&#xff1a;\u4ece\u5bb9\u5668\u914d\u7f6e\u5230\u4f9d\u8d56\u6ce8\u5165\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p>\u5728\u73b0\u4ee3 Spring \u5e94\u7528\u5f00\u53d1\u4e2d&#xff0c;\u57fa\u4e8e\u6ce8\u89e3\u7684\u914d\u7f6e\u5df2\u6210\u4e3a\u4e3b\u6d41\u65b9\u5f0f\u3002\u5b83\u66ff\u4ee3\u4e86\u5197\u957f\u7684 XML \u914d\u7f6e&#xff0c;\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u76f4\u89c2\u4e14\u7c7b\u578b\u5b89\u5168\u3002Spring \u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u6838\u5fc3\u6ce8\u89e3&#xff0c;\u7528\u4e8e\u58f0\u660e Bean\u3001\u542f\u7528\u81ea\u52a8\u88c5\u914d\u3001\u5b9a\u4e49\u7ec4\u4ef6\u89d2\u8272\u7b49\u3002<\/p>\n<p>\u672c\u6587\u5c06\u7cfb\u7edf\u8bb2\u89e3 Spring \u4e2d\u5e38\u7528\u6ce8\u89e3\u7684\u7528\u9014\u3001\u533a\u522b\u53ca\u4f7f\u7528\u89c4\u8303&#xff0c;\u5e76\u7ed3\u5408\u5178\u578b\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848&#xff0c;\u5e2e\u52a9\u5f00\u53d1\u8005\u6b63\u786e\u3001\u9ad8\u6548\u5730\u4f7f\u7528\u6ce8\u89e3\u9a71\u52a8\u5f00\u53d1\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u57fa\u4e8e\u6ce8\u89e3\u7684\u5bb9\u5668\u914d\u7f6e<\/h3>\n<h4>1. \u542f\u7528\u6ce8\u89e3\u652f\u6301<\/h4>\n<p>\u8981\u4f7f\u7528\u6ce8\u89e3&#xff0c;\u9700\u5148\u542f\u7528\u7ec4\u4ef6\u626b\u63cf&#xff08;Component Scanning&#xff09;&#xff1a;<\/p>\n<h5>\u65b9\u5f0f\u4e00&#xff1a;Java Config&#xff08;\u63a8\u8350&#xff09;<\/h5>\n<p><span class=\"token annotation punctuation\">&#064;Configuration<\/span><br \/>\n<span class=\"token annotation punctuation\">&#064;ComponentScan<\/span><span class=\"token punctuation\">(<\/span>basePackages <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;com.example&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AppConfig<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>\u65b9\u5f0f\u4e8c&#xff1a;XML \u914d\u7f6e&#xff08;\u9057\u7559&#xff09;<\/h5>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token namespace\">context:<\/span>component-scan<\/span> <span class=\"token attr-name\">base-package<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>com.example<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><\/p>\n<p>&#x1f4cc; Spring Boot \u9ed8\u8ba4\u542f\u7528 &#064;ComponentScan&#xff0c;\u626b\u63cf\u4e3b\u542f\u52a8\u7c7b\u6240\u5728\u5305\u53ca\u5176\u5b50\u5305\u3002<\/p>\n<h4>2. \u6838\u5fc3\u6ce8\u89e3\u5206\u7c7b<\/h4>\n<table>\n<tr>\u529f\u80fd\u6ce8\u89e3<\/tr>\n<tbody>\n<tr>\n<td>\u58f0\u660e Bean<\/td>\n<td>&#064;Component, &#064;Service, &#064;Repository, &#064;Controller<\/td>\n<\/tr>\n<tr>\n<td>\u4f9d\u8d56\u6ce8\u5165<\/td>\n<td>&#064;Autowired, &#064;Qualifier, &#064;Required<\/td>\n<\/tr>\n<tr>\n<td>\u914d\u7f6e\u7c7b<\/td>\n<td>&#064;Configuration, &#064;Bean<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u4e8c\u3001\u7ec4\u4ef6\u58f0\u660e\u6ce8\u89e3&#xff1a;&#064;Component \u53ca\u5176\u6d3e\u751f\u6ce8\u89e3<\/h3>\n<p>\u8fd9\u4e9b\u6ce8\u89e3\u7528\u4e8e\u5c06\u7c7b\u6807\u8bb0\u4e3a Spring Bean&#xff0c;\u7531\u5bb9\u5668\u7ba1\u7406\u3002<\/p>\n<h4>1. &#064;Component&#xff1a;\u901a\u7528\u7ec4\u4ef6<\/h4>\n<p><span class=\"token annotation punctuation\">&#064;Component<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">EmailSender<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u901a\u7528\u5de5\u5177\u7c7b\u3001\u8f85\u52a9\u7ec4\u4ef6<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2. \u8bed\u4e49\u5316\u6d3e\u751f\u6ce8\u89e3&#xff08;\u529f\u80fd\u76f8\u540c&#xff0c;\u8bed\u4e49\u4e0d\u540c&#xff09;<\/h4>\n<table>\n<tr>\u6ce8\u89e3\u7528\u9014\u7279\u6b8a\u884c\u4e3a<\/tr>\n<tbody>\n<tr>\n<td>&#064;Service<\/td>\n<td>\u4e1a\u52a1\u903b\u8f91\u5c42<\/td>\n<td>\u65e0\u7279\u6b8a\u884c\u4e3a&#xff0c;\u4ec5\u8bed\u4e49\u6807\u8bc6<\/td>\n<\/tr>\n<tr>\n<td>&#064;Repository<\/td>\n<td>\u6570\u636e\u8bbf\u95ee\u5c42<\/td>\n<td>\u81ea\u52a8\u7ffb\u8bd1\u6570\u636e\u5e93\u5f02\u5e38&#xff08;\u5982\u5c06 SQLException \u8f6c\u4e3a DataAccessException&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>&#064;Controller<\/td>\n<td>Web \u63a7\u5236\u5668\u5c42<\/td>\n<td>\u4e0e &#064;RequestMapping \u914d\u5408\u5904\u7406 HTTP \u8bf7\u6c42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>\u793a\u4f8b<\/h5>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderService<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation punctuation\">&#064;Repository<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderRepository<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">save<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Order<\/span> order<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u82e5\u4f7f\u7528 JdbcTemplate&#xff0c;SQLException \u4f1a\u88ab\u81ea\u52a8\u8f6c\u6362<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation punctuation\">&#064;Controller<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderController<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;GetMapping<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/orders&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Order<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">list<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/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>\u2705 \u5efa\u8bae&#xff1a; \u4f7f\u7528\u8bed\u4e49\u5316\u6ce8\u89e3&#xff08;&#064;Service \u7b49&#xff09;\u800c\u975e\u901a\u7528 &#064;Component&#xff0c;\u63d0\u5347\u4ee3\u7801\u53ef\u8bfb\u6027\u4e0e\u5206\u5c42\u6e05\u6670\u5ea6\u3002<\/p>\n<hr \/>\n<h3>\u4e09\u3001\u4f9d\u8d56\u6ce8\u5165\u6ce8\u89e3<\/h3>\n<h4>1. &#064;Autowired&#xff1a;\u81ea\u52a8\u88c5\u914d\u4f9d\u8d56<\/h4>\n<p>Spring \u4f1a\u6839\u636e\u7c7b\u578b&#xff08;byType&#xff09;\u81ea\u52a8\u6ce8\u5165\u5339\u914d\u7684 Bean\u3002<\/p>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderService<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Autowired<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">PaymentService<\/span> paymentService<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b57\u6bb5\u6ce8\u5165&#xff08;\u4e0d\u63a8\u8350&#xff09;<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">InventoryService<\/span> inventoryService<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6784\u9020\u5668\u6ce8\u5165&#xff08;\u63a8\u8350&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">OrderService<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">InventoryService<\/span> inventoryService<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>inventoryService <span class=\"token operator\">&#061;<\/span> inventoryService<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Autowired<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setNotificationService<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">NotificationService<\/span> service<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ Setter \u6ce8\u5165<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>&#x1f4cc; \u4f18\u5148\u7ea7&#xff1a;\u6784\u9020\u5668\u6ce8\u5165 &gt; Setter \u6ce8\u5165 &gt; \u5b57\u6bb5\u6ce8\u5165 Spring \u5b98\u65b9\u81ea 4.x \u8d77\u5f3a\u70c8\u63a8\u8350\u6784\u9020\u5668\u6ce8\u5165\u3002<\/p>\n<hr \/>\n<h4>2. &#064;Qualifier&#xff1a;\u89e3\u51b3\u591a\u5b9e\u73b0\u6b67\u4e49<\/h4>\n<p>\u5f53\u5b58\u5728\u591a\u4e2a\u540c\u7c7b\u578b Bean \u65f6&#xff0c;&#064;Autowired \u65e0\u6cd5\u786e\u5b9a\u6ce8\u5165\u54ea\u4e2a\u3002<\/p>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AlipayPaymentService<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">PaymentService<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;wechat&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WechatPaymentService<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">PaymentService<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderService<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Autowired<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Qualifier<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;alipayPaymentService&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u6309 Bean \u540d\u79f0\u5339\u914d<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">PaymentService<\/span> paymentService<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>&#x1f4a1; &#064;Qualifier \u7684\u503c\u9ed8\u8ba4\u662f\u7c7b\u540d\u9996\u5b57\u6bcd\u5c0f\u5199&#xff08;\u5982 AlipayPaymentService \u2192 alipayPaymentService&#xff09;\u3002<\/p>\n<hr \/>\n<h4>3. &#064;Required&#xff1a;\u5df2\u5e9f\u5f03&#xff0c;\u4e0d\u518d\u63a8\u8350\u4f7f\u7528<\/h4>\n<p>&#064;Required \u7528\u4e8e\u6807\u8bb0 setter \u65b9\u6cd5\u7684\u5c5e\u6027\u5fc5\u987b\u88ab\u914d\u7f6e&#xff08;\u901a\u5e38\u914d\u5408 XML \u4f7f\u7528&#xff09;\u3002 \u5728\u6ce8\u89e3\u9a71\u52a8\u5f00\u53d1\u4e2d\u5df2\u65e0\u5b9e\u9645\u610f\u4e49&#xff0c;Spring \u5b98\u65b9\u6587\u6863\u660e\u786e\u6807\u6ce8\u5176\u201cdeprecated\u201d\u3002<\/p>\n<p>\u2705 \u66ff\u4ee3\u65b9\u6848&#xff1a;\u4f7f\u7528\u6784\u9020\u5668\u6ce8\u5165&#xff0c;\u5929\u7136\u4fdd\u8bc1\u4f9d\u8d56\u975e\u7a7a\u3002<\/p>\n<hr \/>\n<h3>\u56db\u3001\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848<\/h3>\n<h4>\u274c \u95ee\u9898 1&#xff1a;NoSuchBeanDefinitionException<\/h4>\n<p>\u73b0\u8c61&#xff1a;<\/p>\n<p>No qualifying bean of type &#039;PaymentService&#039; available<\/p>\n<p>\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u76ee\u6807\u7c7b\u672a\u88ab Spring \u626b\u63cf&#xff08;\u7f3a\u5c11 &#064;Component \u7b49\u6ce8\u89e3&#xff09;&#xff1b;<\/li>\n<li>\u5305\u8def\u5f84\u4e0d\u5728 &#064;ComponentScan \u8303\u56f4\u5185&#xff1b;<\/li>\n<li>\u591a\u5b9e\u73b0\u7c7b\u672a\u6307\u5b9a &#064;Qualifier\u3002<\/li>\n<\/ul>\n<p>\u2705 \u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<li>\u786e\u8ba4\u7c7b\u4e0a\u6709 &#064;Service \/ &#064;Component&#xff1b;<\/li>\n<li>\u68c0\u67e5\u4e3b\u542f\u52a8\u7c7b\u6216 &#064;ComponentScan \u662f\u5426\u8986\u76d6\u8be5\u5305&#xff1b;<\/li>\n<li>\u82e5\u6709\u591a\u4e2a\u5b9e\u73b0&#xff0c;\u4f7f\u7528 &#064;Qualifier \u6216 &#064;Primary\u3002<\/li>\n<hr \/>\n<h4>\u274c \u95ee\u9898 2&#xff1a;\u5b57\u6bb5\u6ce8\u5165\u5bfc\u81f4\u5355\u5143\u6d4b\u8bd5\u56f0\u96be<\/h4>\n<p>\u73b0\u8c61&#xff1a;\u65e0\u6cd5\u76f4\u63a5 new OrderService() \u8fdb\u884c\u6d4b\u8bd5&#xff0c;\u56e0\u4f9d\u8d56\u4e3a null\u3002<\/p>\n<p>\u2705 \u89e3\u51b3\u65b9\u6848&#xff1a;\u6539\u7528\u6784\u9020\u5668\u6ce8\u5165<\/p>\n<p><span class=\"token comment\">\/\/ \u6d4b\u8bd5\u4ee3\u7801<\/span><br \/>\n<span class=\"token annotation punctuation\">&#064;Test<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">testOrderProcessing<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">PaymentService<\/span> mockPayment <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Mockito<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">mock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">PaymentService<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">OrderService<\/span> service <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">OrderService<\/span><span class=\"token punctuation\">(<\/span>mockPayment<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u76f4\u63a5\u4f20\u53c2<\/span><br \/>\n    service<span class=\"token punctuation\">.<\/span><span class=\"token function\">processOrder<\/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<hr \/>\n<h4>\u274c \u95ee\u9898 3&#xff1a;&#064;Repository \u672a\u751f\u6548&#xff0c;\u6570\u636e\u5e93\u5f02\u5e38\u672a\u8f6c\u6362<\/h4>\n<p>\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u672a\u542f\u7528 Spring \u7684\u5f02\u5e38\u8f6c\u6362\u673a\u5236&#xff1b;<\/li>\n<li>\u672a\u4f7f\u7528 Spring \u63d0\u4f9b\u7684\u6570\u636e\u8bbf\u95ee\u6a21\u677f&#xff08;\u5982 JdbcTemplate&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u2705 \u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<ul>\n<li>\u786e\u4fdd\u4f7f\u7528 JdbcTemplate\u3001HibernateTemplate \u7b49&#xff1b;<\/li>\n<li>\u6216\u624b\u52a8\u6ce8\u518c PersistenceExceptionTranslationPostProcessor&#xff08;Spring Boot \u81ea\u52a8\u914d\u7f6e&#xff09;\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>\u274c \u95ee\u9898 4&#xff1a;\u5faa\u73af\u4f9d\u8d56\u5bfc\u81f4\u542f\u52a8\u5931\u8d25<\/h4>\n<p>\u573a\u666f&#xff1a;<\/p>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">A<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">B<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u6784\u9020\u5668\u6ce8\u5165<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation punctuation\">&#064;Service<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">B<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">B<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">A<\/span> a<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>\u7ed3\u679c&#xff1a;\u5e94\u7528\u542f\u52a8\u5931\u8d25\u3002<\/p>\n<p>\u2705 \u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<ul>\n<li>\u91cd\u6784\u4ee3\u7801&#xff0c;\u6d88\u9664\u5faa\u73af\u4f9d\u8d56&#xff1b;<\/li>\n<li>\u6539\u7528 setter \u6ce8\u5165&#xff08;Spring \u53ef\u901a\u8fc7\u4e09\u7ea7\u7f13\u5b58\u89e3\u51b3&#xff09;&#xff1b;<\/li>\n<li>\u6216\u4f7f\u7528 &#064;Lazy \u5ef6\u8fdf\u521d\u59cb\u5316&#xff1a;<span class=\"token keyword\">public<\/span> <span class=\"token class-name\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token annotation punctuation\">&#064;Lazy<\/span> <span class=\"token class-name\">B<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>b <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span>\n <\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e94\u3001\u6700\u4f73\u5b9e\u8df5\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h3>\n<h4>\u2705 \u63a8\u8350\u505a\u6cd5<\/h4>\n<li>\u4f7f\u7528\u6784\u9020\u5668\u6ce8\u5165\u4f5c\u4e3a\u9ed8\u8ba4\u4f9d\u8d56\u6ce8\u5165\u65b9\u5f0f&#xff1b;<\/li>\n<li>\u907f\u514d\u5b57\u6bb5\u6ce8\u5165&#xff0c;\u4fdd\u6301\u7c7b\u7684\u53ef\u6d4b\u8bd5\u6027\u548c\u5c01\u88c5\u6027&#xff1b;<\/li>\n<li>\u5408\u7406\u4f7f\u7528\u8bed\u4e49\u5316\u6ce8\u89e3&#xff08;&#064;Service\u3001&#064;Repository&#xff09;&#xff1b;<\/li>\n<li>\u660e\u786e\u591a\u5b9e\u73b0\u7684\u6ce8\u5165\u9009\u62e9&#xff0c;\u907f\u514d\u9690\u5f0f\u4f9d\u8d56&#xff1b;<\/li>\n<li>\u4e0d\u8981\u4f7f\u7528\u5df2\u5e9f\u5f03\u7684 &#064;Required\u3002<\/li>\n<h4>\u26a0\ufe0f \u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>&#064;Controller \u548c &#064;RestController \u4e0d\u540c&#xff1a;\u540e\u8005\u81ea\u52a8\u6dfb\u52a0 &#064;ResponseBody&#xff1b;<\/li>\n<li>&#064;Repository \u7684\u5f02\u5e38\u8f6c\u6362\u4ec5\u5bf9 Spring \u6570\u636e\u8bbf\u95ee\u6a21\u677f\u6709\u6548&#xff1b;<\/li>\n<li>\u6ce8\u89e3\u626b\u63cf\u4e0d\u4f1a\u5305\u542b\u7236\u5305\u5916\u7684\u7c7b&#xff0c;\u9700\u663e\u5f0f\u6307\u5b9a basePackages\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u516d\u3001\u603b\u7ed3<\/h3>\n<p>Spring \u6ce8\u89e3\u6781\u5927\u5730\u7b80\u5316\u4e86\u914d\u7f6e\u548c\u4f9d\u8d56\u7ba1\u7406&#xff0c;\u4f46\u5176\u80cc\u540e\u4ecd\u9700\u7406\u89e3\u5bb9\u5668\u7684\u5de5\u4f5c\u673a\u5236\u3002\u6b63\u786e\u4f7f\u7528 &#064;Component \u53ca\u5176\u6d3e\u751f\u6ce8\u89e3\u3001\u5408\u7406\u9009\u62e9\u6ce8\u5165\u65b9\u5f0f\u3001\u59a5\u5584\u5904\u7406\u591a\u5b9e\u73b0\u548c\u5faa\u73af\u4f9d\u8d56&#xff0c;\u662f\u6784\u5efa\u9ad8\u8d28\u91cf Spring \u5e94\u7528\u7684\u5173\u952e\u3002<\/p>\n<p>\u6ce8\u89e3\u662f\u5de5\u5177&#xff0c;\u4e0d\u662f\u9b54\u6cd5\u3002 \u53ea\u6709\u7406\u89e3\u5176\u539f\u7406&#xff0c;\u624d\u80fd\u907f\u514d\u201c\u770b\u4f3c\u80fd\u8dd1&#xff0c;\u5b9e\u5219\u9690\u60a3\u201d\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u5e0c\u671b\u672c\u6587\u7684\u7cfb\u7edf\u68b3\u7406\u4e0e\u5b9e\u6218\u5efa\u8bae&#xff0c;\u80fd\u5e2e\u52a9\u4f60\u5728\u9879\u76ee\u4e2d\u66f4\u4e13\u4e1a\u3001\u66f4\u53ef\u9760\u5730\u4f7f\u7528 Spring \u6ce8\u89e3\u3002<\/p>\n<hr \/>\n<h3>&#x1f4a1;\u4e0a\u5468\u7cbe\u5f69\u56de\u987e<\/h3>\n<ul>\n<li>\u6df1\u5165\u7406\u89e3 Spring \u4e8b\u52a1\u7ba1\u7406&#xff1a;\u539f\u7406\u3001\u914d\u7f6e\u4e0e\u5e38\u89c1\u9677\u9631<\/li>\n<li>Java \u4e2d\u5b9e\u73b0\u6570\u636e\u5217\u7ea7\u6743\u9650\u63a7\u5236&#xff1a;\u4fdd\u62a4\u654f\u611f\u5b57\u6bb5\u7684\u5b9e\u8df5\u6307\u5357<\/li>\n<li>Java \u4e2d\u5b9e\u73b0\u591a\u79df\u6237\u67b6\u6784&#xff1a;\u6570\u636e\u9694\u79bb\u7b56\u7565\u4e0e\u5b9e\u8df5\u6307\u5357<\/li>\n<li>Vue 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