{"id":18385,"date":"2025-04-19T00:47:58","date_gmt":"2025-04-18T16:47:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/18385.html"},"modified":"2025-04-19T00:47:58","modified_gmt":"2025-04-18T16:47:58","slug":"node-js-%e4%b8%ad%e7%9a%84%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9b%b8%e5%85%b3%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/18385.html","title":{"rendered":"Node.js \u4e2d\u7684\u670d\u52a1\u5668\u76f8\u5173\u6982\u5ff5"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>&#x1f9d1;\u200d&#x1f4bb; Node.js \u4e2d\u7684\u670d\u52a1\u5668\u76f8\u5173\u6982\u5ff5<\/li>\n<li>\n<ul>\n<li>&#x1f9d0; 1. \u4ec0\u4e48\u662f HTTP \u670d\u52a1\u5668&#xff1f;<\/li>\n<li>\n<ul>\n<li>1.1 \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 HTTP \u670d\u52a1\u5668<\/li>\n<li>\n<ul>\n<li>\u793a\u4f8b&#xff1a;\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 HTTP \u670d\u52a1\u5668<\/li>\n<\/ul>\n<\/li>\n<li>1.2 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\u670d\u52a1\u5668\u3001\u8bf7\u6c42\u548c\u54cd\u5e94\u3001\u8def\u7531\u3001\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u5e38\u89c1\u7684\u670d\u52a1\u5668\u4efb\u52a1\u3002<\/p>\n<h3>&#x1f9d0; 1. \u4ec0\u4e48\u662f HTTP \u670d\u52a1\u5668&#xff1f;<\/h3>\n<p>HTTP \u670d\u52a1\u5668\u662f\u4e00\u4e2a\u901a\u8fc7 HTTP \u534f\u8bae\u4e0e\u5ba2\u6237\u7aef&#xff08;\u5982\u6d4f\u89c8\u5668&#xff09;\u8fdb\u884c\u901a\u4fe1\u7684\u670d\u52a1\u7aef\u5e94\u7528\u7a0b\u5e8f\u3002\u5728 Node.js \u4e2d&#xff0c;HTTP \u670d\u52a1\u5668\u901a\u5e38\u662f\u901a\u8fc7 http \u6a21\u5757\u6765\u521b\u5efa\u7684\u3002<\/p>\n<h4>1.1 \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 HTTP \u670d\u52a1\u5668<\/h4>\n<p>Node.js \u7684\u5185\u7f6e\u6a21\u5757 http \u63d0\u4f9b\u4e86\u521b\u5efa HTTP \u670d\u52a1\u5668\u6240\u9700\u7684\u529f\u80fd\u3002\u901a\u8fc7\u5b83&#xff0c;\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u542f\u52a8\u4e00\u4e2a\u670d\u52a1\u5668&#xff0c;\u76d1\u542c\u7279\u5b9a\u7aef\u53e3\u5e76\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002<\/p>\n<h5>\u793a\u4f8b&#xff1a;\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 HTTP \u670d\u52a1\u5668<\/h5>\n<p><span class=\"token keyword\">const<\/span> http <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">require<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;http&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u4e00\u4e2a HTTP \u670d\u52a1\u5668<\/span><br \/>\n<span class=\"token keyword\">const<\/span> server <span class=\"token operator\">&#061;<\/span> http<span class=\"token punctuation\">.<\/span><span class=\"token function\">createServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span>statusCode <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8bbe\u7f6e\u54cd\u5e94\u72b6\u6001\u7801<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">setHeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Content-Type&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;text\/plain&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8bbe\u7f6e\u54cd\u5e94\u5934<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Hello, Node.js Server!&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8fd4\u56de\u54cd\u5e94<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u542f\u52a8\u670d\u52a1\u5668\u5e76\u76d1\u542c\u7aef\u53e3<\/span><br \/>\nserver<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;127.0.0.1&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Server running at http:\/\/127.0.0.1:3000\/&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u4f7f\u7528 http.createServer() \u521b\u5efa\u4e86\u4e00\u4e2a HTTP \u670d\u52a1\u5668\u3002<\/li>\n<li>req \u662f\u8bf7\u6c42\u5bf9\u8c61&#xff0c;\u5305\u542b\u8bf7\u6c42\u7684\u76f8\u5173\u4fe1\u606f&#xff08;\u5982\u8bf7\u6c42\u5934\u3001\u8bf7\u6c42\u65b9\u6cd5\u7b49&#xff09;\u3002<\/li>\n<li>res \u662f\u54cd\u5e94\u5bf9\u8c61&#xff0c;\u7528\u6765\u53d1\u9001\u6570\u636e\u7ed9\u5ba2\u6237\u7aef\u3002<\/li>\n<li>server.listen() \u542f\u52a8\u4e86\u670d\u52a1\u5668\u5e76\u76d1\u542c 3000 \u7aef\u53e3\u3002<\/li>\n<\/ul>\n<p>\u5f53\u5ba2\u6237\u7aef\u8bbf\u95ee http:\/\/127.0.0.1:3000\/ \u65f6&#xff0c;\u670d\u52a1\u5668\u4f1a\u8fd4\u56de &#039;Hello, Node.js Server!&#039;\u3002<\/p>\n<h4>1.2 \u8bf7\u6c42\u4e0e\u54cd\u5e94\u5bf9\u8c61<\/h4>\n<ul>\n<li>\u8bf7\u6c42\u5bf9\u8c61 req&#xff1a;\u5305\u542b\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u4fe1\u606f&#xff0c;\u4f8b\u5982\u8bf7\u6c42\u65b9\u6cd5&#xff08;GET\u3001POST \u7b49&#xff09;\u3001\u8bf7\u6c42\u8def\u5f84\u3001\u67e5\u8be2\u53c2\u6570\u3001\u8bf7\u6c42\u5934\u7b49\u3002<\/li>\n<li>\u54cd\u5e94\u5bf9\u8c61 res&#xff1a;\u7528\u4e8e\u53d1\u9001\u54cd\u5e94\u5230\u5ba2\u6237\u7aef&#xff0c;\u5305\u542b\u72b6\u6001\u7801\u3001\u54cd\u5e94\u5934\u548c\u54cd\u5e94\u4f53\u3002<\/li>\n<\/ul>\n<p>\u5e38\u89c1\u7684 HTTP \u8bf7\u6c42\u65b9\u6cd5\u6709&#xff1a;<\/p>\n<ul>\n<li>GET&#xff1a;\u7528\u4e8e\u83b7\u53d6\u6570\u636e\u3002<\/li>\n<li>POST&#xff1a;\u7528\u4e8e\u63d0\u4ea4\u6570\u636e\u3002<\/li>\n<li>PUT&#xff1a;\u7528\u4e8e\u66f4\u65b0\u6570\u636e\u3002<\/li>\n<li>DELETE&#xff1a;\u7528\u4e8e\u5220\u9664\u6570\u636e\u3002<\/li>\n<\/ul>\n<p>\u5728 Node.js \u4e2d&#xff0c;\u6211\u4eec\u901a\u8fc7 req \u548c res \u6765\u8bfb\u53d6\u8bf7\u6c42\u4fe1\u606f\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u7ed3\u679c\u3002<\/p>\n<h3>\u26a1 2. \u8def\u7531\u548c\u8bf7\u6c42\u5904\u7406<\/h3>\n<p>\u4e00\u4e2a HTTP \u670d\u52a1\u5668\u5e38\u5e38\u9700\u8981\u6839\u636e\u4e0d\u540c\u7684 URL \u8def\u5f84\u6216 HTTP \u65b9\u6cd5\u6765\u505a\u4e0d\u540c\u7684\u5904\u7406\u3002\u901a\u8fc7\u8bbe\u7f6e \u8def\u7531&#xff0c;\u6211\u4eec\u53ef\u4ee5\u5c06\u8bf7\u6c42\u5206\u53d1\u5230\u4e0d\u540c\u7684\u5904\u7406\u51fd\u6570\u4e2d\u3002<\/p>\n<h4>2.1 \u624b\u52a8\u8def\u7531<\/h4>\n<p>\u5728 Node.js \u4e2d&#xff0c;\u4f60\u53ef\u4ee5\u624b\u52a8\u68c0\u67e5 req.url \u548c req.method \u6765\u51b3\u5b9a\u5982\u4f55\u5904\u7406\u8bf7\u6c42\u3002\u4f8b\u5982&#xff0c;\u6211\u4eec\u53ef\u4ee5\u6839\u636e URL \u8def\u5f84\u6765\u533a\u5206\u4e0d\u540c\u7684\u8bf7\u6c42\u3002<\/p>\n<h5>\u793a\u4f8b&#xff1a;\u7b80\u5355\u7684\u8def\u7531\u5904\u7406<\/h5>\n<p><span class=\"token keyword\">const<\/span> http <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">require<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;http&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> server <span class=\"token operator\">&#061;<\/span> http<span class=\"token punctuation\">.<\/span><span class=\"token function\">createServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>req<span class=\"token punctuation\">.<\/span>method <span class=\"token operator\">&#061;&#061;&#061;<\/span> <span class=\"token string\">&#039;GET&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> req<span class=\"token punctuation\">.<\/span>url <span class=\"token operator\">&#061;&#061;&#061;<\/span> <span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span>statusCode <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span><span class=\"token function\">setHeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Content-Type&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;text\/plain&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Welcome to the Home Page!&#039;<\/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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>req<span class=\"token punctuation\">.<\/span>method <span class=\"token operator\">&#061;&#061;&#061;<\/span> <span class=\"token string\">&#039;GET&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> req<span class=\"token punctuation\">.<\/span>url <span class=\"token operator\">&#061;&#061;&#061;<\/span> <span class=\"token string\">&#039;\/about&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span>statusCode <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span><span class=\"token function\">setHeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Content-Type&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;text\/plain&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;This is the About Page!&#039;<\/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    res<span class=\"token punctuation\">.<\/span>statusCode <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">404<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span><span class=\"token function\">setHeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Content-Type&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;text\/plain&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    res<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Page Not Found&#039;<\/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><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>server<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;127.0.0.1&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Server running at http:\/\/127.0.0.1:3000\/&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u68c0\u67e5 req.method \u548c req.url \u6765\u51b3\u5b9a\u5982\u4f55\u54cd\u5e94\u4e0d\u540c\u7684\u8bf7\u6c42\u3002<\/li>\n<li>\u5982\u679c\u7528\u6237\u8bbf\u95ee \/about \u8def\u5f84&#xff0c;\u670d\u52a1\u5668\u8fd4\u56de &#039;This is the About Page!&#039;\u3002<\/li>\n<li>\u5982\u679c\u8bbf\u95ee \/ \u8def\u5f84&#xff0c;\u670d\u52a1\u5668\u8fd4\u56de &#039;Welcome to the Home Page!&#039;\u3002<\/li>\n<li>\u5bf9\u4e8e\u5176\u4ed6\u8bf7\u6c42&#xff0c;\u8fd4\u56de &#039;Page Not Found&#039;\u3002<\/li>\n<\/ul>\n<h4>2.2 \u4f7f\u7528\u7b2c\u4e09\u65b9\u8def\u7531\u5e93<\/h4>\n<p>\u867d\u7136 Node.js \u5185\u7f6e\u7684 http \u6a21\u5757\u8db3\u591f\u7b80\u5355&#xff0c;\u4f46\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d&#xff0c;\u624b\u52a8\u7ba1\u7406\u8def\u7531\u548c\u8bf7\u6c42\u5904\u7406\u53ef\u80fd\u4f1a\u53d8\u5f97\u7e41\u7410\u3002\u4e3a\u6b64&#xff0c;\u6211\u4eec\u901a\u5e38\u4f7f\u7528\u50cf Express \u8fd9\u6837\u7684\u7b2c\u4e09\u65b9\u5e93\u6765\u7b80\u5316\u8def\u7531\u5904\u7406\u3002<\/p>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528 Express \u5b9e\u73b0\u8def\u7531<\/h5>\n<p><span class=\"token keyword\">const<\/span> express <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">require<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;express&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> app <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">express<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u8def\u7531<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Welcome to the Home Page!&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>app<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/about&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;This is the About Page!&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u542f\u52a8\u670d\u52a1\u5668<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Server running at http:\/\/127.0.0.1:3000\/&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u4f7f\u7528 express() \u521b\u5efa\u4e86\u4e00\u4e2a Express \u5e94\u7528\u3002<\/li>\n<li>\u4f7f\u7528 app.get() \u5b9a\u4e49\u4e86\u4e24\u4e2a\u8def\u7531&#xff0c;\u5206\u522b\u5904\u7406\u8bbf\u95ee \/ \u548c \/about \u7684 GET \u8bf7\u6c42\u3002<\/li>\n<li>\u6700\u540e&#xff0c;\u4f7f\u7528 app.listen() \u542f\u52a8\u4e86\u670d\u52a1\u5668\u3002<\/li>\n<\/ul>\n<h4>2.3 \u8def\u7531\u53c2\u6570<\/h4>\n<p>\u8def\u7531\u5904\u7406\u4e0d\u4ec5\u4ec5\u662f\u9759\u6001\u8def\u5f84&#xff0c;\u4e5f\u53ef\u4ee5\u901a\u8fc7\u52a8\u6001\u8def\u7531\u6765\u83b7\u53d6\u8bf7\u6c42\u7684\u53c2\u6570\u3002<\/p>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528\u52a8\u6001\u8def\u7531\u53c2\u6570<\/h5>\n<p><span class=\"token keyword\">const<\/span> express <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">require<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;express&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> app <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">express<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528\u8def\u7531\u53c2\u6570<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/user\/:id&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> userId <span class=\"token operator\">&#061;<\/span> req<span class=\"token punctuation\">.<\/span>params<span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">;<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">User ID: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>userId<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>app<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Server running at http:\/\/127.0.0.1:3000\/&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d&#xff1a;<\/p>\n<ul>\n<li>\u8def\u7531 \/user\/:id \u4e2d\u7684 :id \u662f\u4e00\u4e2a\u52a8\u6001\u53c2\u6570\u3002<\/li>\n<li>\u901a\u8fc7 req.params.id \u83b7\u53d6\u5ba2\u6237\u7aef\u8bf7\u6c42\u4e2d URL \u7684\u53c2\u6570\u90e8\u5206\u3002<\/li>\n<\/ul>\n<h3>&#x1f4a1; 3. \u4e2d\u95f4\u4ef6\u4e0e\u8bf7\u6c42\u5904\u7406<\/h3>\n<p>\u5728 Node.js \u4e2d&#xff0c;\u4e2d\u95f4\u4ef6 \u662f\u4e00\u6bb5\u7528\u4e8e\u5904\u7406\u8bf7\u6c42\u7684\u51fd\u6570\u3002\u5728 Express \u4e2d&#xff0c;\u4e2d\u95f4\u4ef6\u53ef\u4ee5\u5728\u8bf7\u6c42\u5230\u8fbe\u8def\u7531\u5904\u7406\u51fd\u6570\u4e4b\u524d\u6216\u4e4b\u540e\u6267\u884c&#xff0c;\u5e38\u7528\u4e8e\u65e5\u5fd7\u8bb0\u5f55\u3001\u8bf7\u6c42\u89e3\u6790\u3001\u8eab\u4efd\u9a8c\u8bc1\u7b49\u3002<\/p>\n<h4>3.1 \u4f7f\u7528\u4e2d\u95f4\u4ef6<\/h4>\n<h5>\u793a\u4f8b&#xff1a;\u57fa\u672c\u4e2d\u95f4\u4ef6<\/h5>\n<p><span class=\"token keyword\">const<\/span> express <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">require<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;express&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> app <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">express<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u4e2d\u95f4\u4ef6<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">use<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<span class=\"token punctuation\">,<\/span> next<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Request received:&#039;<\/span><span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">.<\/span>method<span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">.<\/span>url<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528\u4e0b\u4e00\u4e2a\u4e2d\u95f4\u4ef6\u6216\u8def\u7531\u5904\u7406\u51fd\u6570<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u8def\u7531<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Hello from the Home Page!&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>app<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Server running at http:\/\/127.0.0.1:3000\/&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u4f7f\u7528 app.use() \u5b9a\u4e49\u4e86\u4e00\u4e2a\u4e2d\u95f4\u4ef6&#xff0c;\u5b83\u4f1a\u5728\u6bcf\u6b21\u8bf7\u6c42\u5230\u8fbe\u8def\u7531\u4e4b\u524d\u88ab\u8c03\u7528\u3002<\/li>\n<li>\u4e2d\u95f4\u4ef6\u4e2d\u8c03\u7528 next()&#xff0c;\u5141\u8bb8\u8bf7\u6c42\u7ee7\u7eed\u4f20\u9012\u7ed9\u4e0b\u4e00\u4e2a\u5904\u7406\u51fd\u6570\u3002<\/li>\n<\/ul>\n<h4>3.2 \u4f7f\u7528\u591a\u4e2a\u4e2d\u95f4\u4ef6<\/h4>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u591a\u4e2a\u4e2d\u95f4\u4ef6\u6765\u5904\u7406\u4e0d\u540c\u7684\u4efb\u52a1\u3002\u4f8b\u5982&#xff0c;\u5148\u8fdb\u884c\u65e5\u5fd7\u8bb0\u5f55&#xff0c;\u518d\u8fdb\u884c\u8bf7\u6c42\u4f53\u89e3\u6790\u3002<\/p>\n<p><span class=\"token keyword\">const<\/span> express <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">require<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;express&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> app <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">express<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8bf7\u6c42\u4f53\u89e3\u6790\u4e2d\u95f4\u4ef6<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">use<\/span><span class=\"token punctuation\">(<\/span>express<span class=\"token punctuation\">.<\/span><span class=\"token function\">json<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u65e5\u5fd7\u4e2d\u95f4\u4ef6<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span><span class=\"token function\">use<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<span class=\"token punctuation\">,<\/span> next<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Request received:&#039;<\/span><span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">.<\/span>method<span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">.<\/span>url<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <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 punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>app<span class=\"token punctuation\">.<\/span><span class=\"token function\">post<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">req<span class=\"token punctuation\">,<\/span> res<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Request body:&#039;<\/span><span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  res<span class=\"token punctuation\">.<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Data received&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>app<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Server running at http:\/\/127.0.0.1:3000\/&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span 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