{"id":1075,"date":"2026-11-15T10:41:59","date_gmt":"2026-11-15T02:41:59","guid":{"rendered":"https:\/\/btc354.com\/index.php\/2026\/11\/15\/nestjs-%e5%b7%a5%e7%a8%8b%e5%8c%96%e6%9e%b6%e6%9e%84%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e-express-%e8%b7%af%e7%94%b1%e6%b3%a5%e6%bd%ad%e5%88%b0%e6%a8%a1%e5%9d%97%e5%8c%96%e5%8f%af%e6%89%a9%e5%b1%95\/"},"modified":"2026-11-15T10:41:59","modified_gmt":"2026-11-15T02:41:59","slug":"nestjs-%e5%b7%a5%e7%a8%8b%e5%8c%96%e6%9e%b6%e6%9e%84%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e-express-%e8%b7%af%e7%94%b1%e6%b3%a5%e6%bd%ad%e5%88%b0%e6%a8%a1%e5%9d%97%e5%8c%96%e5%8f%af%e6%89%a9%e5%b1%95","status":"publish","type":"post","link":"https:\/\/btc354.com\/index.php\/2026\/11\/15\/nestjs-%e5%b7%a5%e7%a8%8b%e5%8c%96%e6%9e%b6%e6%9e%84%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e-express-%e8%b7%af%e7%94%b1%e6%b3%a5%e6%bd%ad%e5%88%b0%e6%a8%a1%e5%9d%97%e5%8c%96%e5%8f%af%e6%89%a9%e5%b1%95\/","title":{"rendered":"NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u5b9e\u6218\uff1a\u4ece Express \u8def\u7531\u6ce5\u6f6d\u5230\u6a21\u5757\u5316\u53ef\u6269\u5c55\u540e\u7aef\u7684\u5206\u5c42\u843d\u5730\u6307\u5357"},"content":{"rendered":"<blockquote class=\"doc-lead\"><p><strong>\u5bfc\u8bed\uff1a<\/strong>NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u771f\u6b63\u89e3\u51b3\u7684\uff0c\u4ece\u6765\u4e0d\u662f\u201c\u5982\u4f55\u5199\u4e00\u4e2a\u8def\u7531\u201d\uff0c\u800c\u662f\u201c\u5f53\u8def\u7531\u589e\u957f\u5230\u4e94\u5341\u6761\u65f6\uff0c\u4ee3\u7801\u4e3a\u4ec0\u4e48\u8fd8\u80fd\u4fdd\u6301\u79e9\u5e8f\u201d\u3002\u672c\u6587\u4e0d\u5199\u5165\u95e8 Hello World\uff0c\u800c\u662f\u7ad9\u5728\u4e00\u7ebf\u67b6\u6784\u5e08\u89c6\u89d2\uff0c\u62c6\u89e3 NestJS \u7684\u5206\u5c42\u5951\u7ea6\u3001\u88c5\u9970\u5668\u5143\u7f16\u7a0b\u4e0e IoC \u5bb9\u5668\u5185\u6838\uff0c\u5e76\u7ed9\u51fa\u4ece Express \u8fc1\u79fb\u5230 NestJS \u7684\u5de5\u7a0b\u5316\u843d\u5730\u51b3\u7b56\u4e0e\u907f\u5751\u6e05\u5355\u3002<\/p><\/blockquote>\n<div class=\"doc-spec-grid\">\n<div class=\"doc-spec-item\"><span class=\"doc-spec-label\">\ud83c\udfaf \u6838\u5fc3\u6280\u672f<\/span><span class=\"doc-spec-value\">NestJS 10 + TypeScript + DI \u5bb9\u5668<\/span><\/div>\n<div class=\"doc-spec-item\"><span class=\"doc-spec-label\">\u26a1 \u67b6\u6784\u96be\u5ea6<\/span><span class=\"doc-spec-value\">\u8d44\u6df1\u67b6\u6784\u7ea7 (Level 3-4)<\/span><\/div>\n<div class=\"doc-spec-item\"><span class=\"doc-spec-label\">\ud83d\ude80 \u6838\u5fc3\u6536\u76ca<\/span><span class=\"doc-spec-value\">\u6a21\u5757\u8fb9\u754c\u6e05\u6670 \/ \u5355\u6d4b\u8986\u76d6\u7387\u63d0\u5347 40%+<\/span><\/div>\n<\/div>\n<h2 class=\"doc-h2\">\u4e00\u3001\u4e3a\u4ec0\u4e48 Node.js \u540e\u7aef\u9700\u8981 NestJS \u5de5\u7a0b\u5316\u67b6\u6784<\/h2>\n<p class=\"doc-p\">Express \u7684\u54f2\u5b66\u662f\u201c\u6781\u7b80\u4e0e\u81ea\u7531\u201d\uff1a\u7ed9\u4f60\u4e00\u4e2a <code>app.get()<\/code>\uff0c\u5269\u4e0b\u7684\u8def\u7531\u7ec4\u7ec7\u3001\u4e2d\u95f4\u4ef6\u987a\u5e8f\u3001\u4e1a\u52a1\u903b\u8f91\u5f52\u5c5e\u5168\u90e8\u7531\u5f00\u53d1\u8005\u81ea\u884c\u51b3\u5b9a\u3002\u8fd9\u5728 5 \u4e2a\u63a5\u53e3\u7684\u5c0f\u670d\u52a1\u91cc\u662f\u4f18\u52bf\uff0c\u4f46\u5728 50 \u4e2a\u63a5\u53e3\u30013 \u4e2a\u56e2\u961f\u534f\u4f5c\u7684\u9879\u76ee\u91cc\uff0c\u81ea\u7531\u4f1a\u8fc5\u901f\u9000\u5316\u4e3a\u6df7\u4e71\u2014\u2014\u8def\u7531\u5904\u7406\u5668\u91cc\u585e\u6ee1\u6570\u636e\u5e93\u67e5\u8be2\u3001\u53c2\u6570\u6821\u9a8c\u3001\u6743\u9650\u5224\u65ad\u4e0e\u54cd\u5e94\u7ec4\u88c5\uff0c\u6700\u7ec8\u5f62\u6210\u4e00\u5768\u65e0\u6cd5\u6d4b\u8bd5\u3001\u65e0\u6cd5\u590d\u7528\u3001\u65e0\u6cd5\u5b9a\u4f4d\u7684\u201c\u8def\u7531\u6ce5\u6f6d\u201d\u3002<\/p>\n<p class=\"doc-p\">NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u6838\u5fc3\u4ef7\u503c\uff0c\u662f\u628a Angular \u5728\u5927\u578b\u524d\u7aef\u9879\u76ee\u91cc\u9a8c\u8bc1\u8fc7\u7684\u5206\u5c42\u5951\u7ea6\u642c\u5230\u670d\u52a1\u7aef\uff1a<strong>\u6a21\u5757\uff08Module\uff09\u8d1f\u8d23\u7279\u6027\u8fb9\u754c\uff0c\u63a7\u5236\u5668\uff08Controller\uff09\u53ea\u8d1f\u8d23 HTTP \u534f\u8bae\u9002\u914d\uff0c\u670d\u52a1\uff08Service\/Provider\uff09\u627f\u8f7d\u4e1a\u52a1\u903b\u8f91\uff0c\u4f9d\u8d56\u6ce8\u5165\uff08DI\uff09\u8d1f\u8d23\u5bf9\u8c61\u88c5\u914d<\/strong>\u3002\u8fd9\u56db\u8005\u6784\u6210\u4e00\u5957\u5f3a\u7ea6\u675f\uff0c\u8ba9\u201c\u4ee3\u7801\u8be5\u653e\u54ea\u91cc\u201d\u4ece\u4e3b\u89c2\u4e89\u8bba\u53d8\u6210\u67b6\u6784\u89c4\u5219\u3002<\/p>\n<div class=\"doc-callout doc-callout-info\">\n<div class=\"doc-callout-title\">\ud83d\udca1 \u67b6\u6784\u6838\u5fc3\u51b3\u7b56<\/div>\n<p>\u9009\u62e9 NestJS \u7684\u672c\u8d28\u4e0d\u662f\u9009\u4e00\u4e2a\u6846\u67b6\uff0c\u800c\u662f\u9009\u4e00\u5957\u201c\u56e2\u961f\u534f\u4f5c\u5951\u7ea6\u201d\u3002\u5b83\u7528 TypeScript \u7c7b\u578b\u7cfb\u7edf + \u88c5\u9970\u5668\u5143\u6570\u636e + IoC \u5bb9\u5668\uff0c\u628a Spring \/ ASP.NET \u6c89\u6dc0\u4e86\u4e8c\u5341\u5e74\u7684\u5206\u5c42\u601d\u60f3\u4ee5 Node.js \u60ef\u7528\u65b9\u5f0f\u91cd\u65b0\u5b9e\u73b0\u3002\u5b66\u4f1a\u8fd9\u5957\u5951\u7ea6\uff0c\u8fc1\u79fb\u5230\u4efb\u4f55\u4f01\u4e1a\u7ea7\u540e\u7aef\u6846\u67b6\u90fd\u80fd\u590d\u7528\u3002<\/p><\/div>\n<div class=\"doc-arch-card\">\n<div class=\"doc-arch-header\">\n<div class=\"doc-arch-title-wrap\">\n      <span class=\"doc-arch-title\"><span class=\"icon\">\ud83d\udcd0<\/span> NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u8bf7\u6c42\u751f\u547d\u5468\u671f\u4e0e\u5206\u5c42\u534f\u4f5c\u5168\u666f<\/span><br \/>\n      <span class=\"doc-arch-badge\">\u4f01\u4e1a\u7ea7\u67b6\u6784\u89c4\u8303<\/span>\n    <\/div>\n<div class=\"doc-arch-actions\">\n      <button type=\"button\" class=\"doc-arch-btn btn-copy-raw\">\ud83d\udccb \u590d\u5236\u6e90\u7801<\/button><br \/>\n      <button type=\"button\" class=\"doc-arch-btn btn-zoom-arch\">\ud83d\udd0d \u653e\u5927\u67e5\u770b<\/button>\n    <\/div>\n<\/p><\/div>\n<pre class=\"mermaid\">\nflowchart TD\n    subgraph \u63a5\u5165\u5c42 [\"\u8868\u73b0\u5c42\u4e0e\u63a5\u5165\u7f51\u5173 (Client &amp; Gateway Tier)\"]\n        A[\"HTTP \u5ba2\u6237\u7aef\u8bf7\u6c42 (REST \/ GraphQL)\"] --&gt; B[\"\u5168\u5c40\u4e2d\u95f4\u4ef6\u4e0e\u5b88\u536b (Middleware \/ Guard)\"]\n        B --&gt; C[\"\u7ba1\u9053\u6821\u9a8c\u4e0e\u8f6c\u6362 (Pipe \/ ValidationPipe)\"]\n    end\n    subgraph \u5e94\u7528\u5c42 [\"\u63a7\u5236\u5668\u4e0e\u534f\u8bae\u9002\u914d\u5c42 (Controller Tier)\"]\n        C --&gt; D[\"\u63a7\u5236\u5668\u8def\u7531\u5206\u53d1 (Controller Router)\"]\n    end\n    subgraph \u9886\u57df\u5c42 [\"\u4e1a\u52a1\u670d\u52a1\u4e0e\u4f9d\u8d56\u6ce8\u5165\u5c42 (Service &amp; DI Tier)\"]\n        D --&gt; E[\"\u670d\u52a1\u4e1a\u52a1\u903b\u8f91 (Service \/ Provider)\"]\n        E --&gt; F[\"IoC \u5bb9\u5668\u4f9d\u8d56\u88c5\u914d (Injector Container)\"]\n    end\n    subgraph \u5b58\u50a8\u5c42 [\"\u57fa\u7840\u8bbe\u65bd\u4e0e\u6301\u4e45\u5316\u5c42 (Infrastructure Tier)\"]\n        E --&gt; G[\"\u4ed3\u50a8\u4e0e ORM \u8bbf\u95ee (Repository \/ TypeORM)\"]\n        G --&gt; H[(\"\u6301\u4e45\u5316\u6570\u636e\u5e93 (PostgreSQL \/ MySQL)\")]\n    end\n    subgraph \u6a2a\u5207\u5c42 [\"\u6a2a\u5207\u5173\u6ce8\u70b9 (Cross-Cutting Tier)\"]\n        I[\"\u5f02\u5e38\u8fc7\u6ee4\u5668 (Exception Filter)\"] -.-&gt; D\n        J[\"\u62e6\u622a\u5668 (Interceptor)\"] -.-&gt; E\n    end\n  <\/pre>\n<div class=\"doc-arch-caption\">\u56fe 1\uff1aNestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u8bf7\u6c42\u751f\u547d\u5468\u671f\uff0c\u4ece\u63a5\u5165\u5c42\u5b88\u536b\u6821\u9a8c\u5230\u9886\u57df\u5c42\u670d\u52a1\u6ce8\u5165\uff0c\u518d\u5230\u5b58\u50a8\u5c42\u6301\u4e45\u5316\uff0c\u6a2a\u5207\u5c42\u7edf\u4e00\u5904\u7406\u5f02\u5e38\u4e0e\u65e5\u5fd7\u3002<\/div>\n<\/div>\n<h2 class=\"doc-h2\">\u4e8c\u3001\u5206\u5c42\u5951\u7ea6\u62c6\u89e3\uff1a\u6a21\u5757\u3001\u63a7\u5236\u5668\u3001\u670d\u52a1\u4e0e\u4f9d\u8d56\u6ce8\u5165<\/h2>\n<h3 class=\"doc-h3\">2.1 \u6a21\u5757\uff08Module\uff09\uff1a\u7279\u6027\u8fb9\u754c\u7684\u7b2c\u4e00\u9053\u9632\u7ebf<\/h3>\n<p class=\"doc-p\">\u6a21\u5757\u662f NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u9876\u5c42\u7ec4\u7ec7\u5355\u5143\uff0c\u5b83\u56de\u7b54\u7684\u662f\u201c\u54ea\u4e9b\u4e1c\u897f\u5c5e\u4e8e\u540c\u4e00\u4e2a\u4e1a\u52a1\u7279\u6027\u201d\u3002\u4e00\u4e2a <code>UsersModule<\/code> \u5e94\u5f53\u540c\u65f6\u5305\u542b\u7528\u6237\u63a7\u5236\u5668\u3001\u7528\u6237\u670d\u52a1\u3001\u7528\u6237\u5b9e\u4f53\u4e0e\u7528\u6237\u4ed3\u50a8\uff0c\u800c\u4e0d\u662f\u6309\u6280\u672f\u5206\u5c42\u628a controller \u5168\u653e\u4e00\u4e2a\u76ee\u5f55\u3001service \u5168\u653e\u53e6\u4e00\u4e2a\u76ee\u5f55\u3002\u6309\u7279\u6027\u5207\u5206\u6a21\u5757\uff0c\u624d\u80fd\u8ba9\u56e2\u961f\u5728\u5e76\u884c\u5f00\u53d1\u65f6\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\" data-enlighter-title=\"users.module.ts\">import { Module } from '@nestjs\/common';\nimport { TypeOrmModule } from '@nestjs\/typeorm';\nimport { UsersController } from '.\/users.controller';\nimport { UsersService } from '.\/users.service';\nimport { User } from '.\/entities\/user.entity';\n\n@Module({\n  imports: [TypeOrmModule.forFeature([User])],\n  controllers: [UsersController],\n  providers: [UsersService],\n  exports: [UsersService], \/\/ \u663e\u5f0f\u5bfc\u51fa\uff0c\u4f9b\u5176\u4ed6\u6a21\u5757\u6ce8\u5165\n})\nexport class UsersModule {}<\/pre>\n<p class=\"doc-p\">\u6ce8\u610f <code>exports<\/code> \u5b57\u6bb5\uff1aNestJS \u7684\u6a21\u5757\u9ed8\u8ba4\u662f\u5c01\u95ed\u7684\uff0c\u53ea\u6709\u663e\u5f0f\u5bfc\u51fa\u7684 Provider \u624d\u80fd\u88ab\u5176\u4ed6\u6a21\u5757\u6ce8\u5165\u3002\u8fd9\u6761\u89c4\u5219\u5f3a\u5236\u56e2\u961f\u601d\u8003\u201c\u54ea\u4e9b\u80fd\u529b\u662f\u5bf9\u5916\u5951\u7ea6\u201d\uff0c\u907f\u514d\u670d\u52a1\u4e4b\u95f4\u968f\u610f\u8026\u5408\u3002<\/p>\n<h3 class=\"doc-h3\">2.2 \u63a7\u5236\u5668\uff08Controller\uff09\uff1a\u53ea\u505a\u534f\u8bae\u9002\u914d\uff0c\u4e0d\u5199\u4e1a\u52a1<\/h3>\n<p class=\"doc-p\">\u63a7\u5236\u5668\u662f HTTP \u534f\u8bae\u4e0e\u9886\u57df\u903b\u8f91\u4e4b\u95f4\u7684\u9632\u8150\u5c42\u3002\u5b83\u7684\u804c\u8d23\u8fb9\u754c\u5e94\u5f53\u6781\u5176\u514b\u5236\uff1a\u89e3\u6790\u8bf7\u6c42\u53c2\u6570\u3001\u8c03\u7528\u670d\u52a1\u3001\u8fd4\u56de\u54cd\u5e94\u3002\u4efb\u4f55\u6570\u636e\u5e93\u8bbf\u95ee\u3001\u4e8b\u52a1\u7f16\u6392\u3001\u7b2c\u4e09\u65b9\u8c03\u7528\u90fd\u4e0d\u5e94\u51fa\u73b0\u5728\u63a7\u5236\u5668\u91cc\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b26\u5408\u5de5\u7a0b\u89c4\u8303\u7684\u63a7\u5236\u5668\u793a\u4f8b\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\" data-enlighter-title=\"users.controller.ts\">import { Controller, Get, Post, Body, Param, ParseIntPipe } from '@nestjs\/common';\nimport { UsersService } from '.\/users.service';\nimport { CreateUserDto } from '.\/dto\/create-user.dto';\n\n@Controller('users')\nexport class UsersController {\n  constructor(private readonly usersService: UsersService) {}\n\n  @Get(':id')\n  findOne(@Param('id', ParseIntPipe) id: number) {\n    return this.usersService.findOne(id);\n  }\n\n  @Post()\n  create(@Body() dto: CreateUserDto) {\n    return this.usersService.create(dto);\n  }\n}<\/pre>\n<p class=\"doc-p\">\u6784\u9020\u51fd\u6570\u6ce8\u5165 <code>UsersService<\/code> \u662f\u4f9d\u8d56\u6ce8\u5165\u7684\u5165\u53e3\uff1a\u63a7\u5236\u5668\u4ece\u4e0d <code>new UsersService()<\/code>\uff0c\u800c\u662f\u58f0\u660e\u201c\u6211\u9700\u8981\u5b83\u201d\uff0c\u7531 IoC \u5bb9\u5668\u5728\u8fd0\u884c\u65f6\u88c5\u914d\u3002\u8fd9\u6b63\u662f\u53ef\u6d4b\u8bd5\u6027\u7684\u6765\u6e90\u2014\u2014\u5355\u5143\u6d4b\u8bd5\u65f6\u53ef\u4ee5\u76f4\u63a5\u4f20\u5165 mock \u66ff\u8eab\u3002<\/p>\n<h3 class=\"doc-h3\">2.3 \u670d\u52a1\uff08Provider\uff09\uff1a\u4e1a\u52a1\u903b\u8f91\u7684\u552f\u4e00\u5f52\u5c5e\u5730<\/h3>\n<p class=\"doc-p\">\u670d\u52a1\u662f NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u4e2d\u771f\u6b63\u627f\u8f7d\u4e1a\u52a1\u7684\u5730\u65b9\u3002\u5b83\u5e94\u5f53\u662f\u65e0\u72b6\u6001\u3001\u53ef\u6ce8\u5165\u3001\u53ef\u66ff\u6362\u7684\u7c7b\u3002\u4e00\u4e2a\u5e38\u89c1\u7684\u53cd\u6a21\u5f0f\u662f\u628a\u670d\u52a1\u5199\u6210\u201c\u4e07\u80fd\u4e0a\u5e1d\u7c7b\u201d\uff0c\u6b63\u786e\u505a\u6cd5\u662f\u6309\u805a\u5408\u6839\u62c6\u5206\uff0c\u5e76\u901a\u8fc7\u6a21\u5757 exports \u7ec4\u5408\u80fd\u529b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\" data-enlighter-title=\"users.service.ts\">import { Injectable, NotFoundException } from '@nestjs\/common';\nimport { InjectRepository } from '@nestjs\/typeorm';\nimport { Repository } from 'typeorm';\nimport { User } from '.\/entities\/user.entity';\n\n@Injectable()\nexport class UsersService {\n  constructor(\n    @InjectRepository(User)\n    private readonly userRepo: Repository,\n  ) {}\n\n  async findOne(id: number): Promise {\n    const user = await this.userRepo.findOneBy({ id });\n    if (!user) throw new NotFoundException(`User ${id} not found`);\n    return user;\n  }\n}<\/pre>\n<div class=\"doc-callout doc-callout-warning\">\n<div class=\"doc-callout-title\">\u26a0\ufe0f \u751f\u4ea7\u907f\u5751\u98ce\u9669<\/div>\n<p>\u4e0d\u8981\u5728\u670d\u52a1\u91cc\u76f4\u63a5 <code>new<\/code> \u5176\u4ed6\u670d\u52a1\u6216\u4ed3\u50a8\uff0c\u4e5f\u4e0d\u8981\u7528 <code>forwardRef<\/code> \u63a9\u76d6\u5faa\u73af\u4f9d\u8d56\u3002\u5faa\u73af\u4f9d\u8d56\u662f\u6a21\u5757\u8fb9\u754c\u8bbe\u8ba1\u9519\u8bef\u7684\u4fe1\u53f7\uff0c\u6b63\u786e\u505a\u6cd5\u662f\u62bd\u53d6\u5171\u4eab\u80fd\u529b\u5230\u72ec\u7acb\u6a21\u5757\uff0c\u800c\u4e0d\u662f\u7528 <code>forwardRef<\/code> \u6253\u8865\u4e01\u3002<\/div>\n<h2 class=\"doc-h2\">\u4e09\u3001\u5e95\u5c42\u539f\u7406\uff1a\u88c5\u9970\u5668\u5143\u7f16\u7a0b\u4e0e IoC \u5bb9\u5668\u5982\u4f55\u8fd0\u8f6c<\/h2>\n<p class=\"doc-p\">\u5f88\u591a\u5f00\u53d1\u8005\u628a NestJS \u7684\u201c\u9b54\u6cd5\u201d\u5f53\u4f5c\u9ed1\u76d2\uff0c\u4e00\u65e6\u6ce8\u5165\u5931\u8d25\u5c31\u675f\u624b\u65e0\u7b56\u3002\u7406\u89e3\u5176\u5e95\u5c42\u673a\u5236\uff0c\u662f\u9a7e\u9a6d NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u5206\u6c34\u5cad\u3002<\/p>\n<p class=\"doc-p\">NestJS \u7684\u4f9d\u8d56\u6ce8\u5165\u5efa\u7acb\u5728\u4e24\u4e2a\u673a\u5236\u4e4b\u4e0a\uff1a<strong>TypeScript \u7684 <code>emitDecoratorMetadata<\/code> \u7f16\u8bd1\u9009\u9879<\/strong>\u4f1a\u5728\u7f16\u8bd1\u671f\u4e3a\u6784\u9020\u51fd\u6570\u53c2\u6570\u751f\u6210\u7c7b\u578b\u5143\u6570\u636e\uff1b<strong>\u88c5\u9970\u5668 <code>@Injectable()<\/code><\/strong> \u5219\u628a\u7c7b\u6807\u8bb0\u4e3a\u53ef\u88ab\u5bb9\u5668\u7ba1\u7406\u7684 Provider\u3002\u542f\u52a8\u65f6\uff0cNestJS \u626b\u63cf\u6240\u6709\u6a21\u5757\uff0c\u6784\u5efa\u4e00\u5f20\u201cToken \u2192 Provider \u5b9e\u4f8b\u201d\u7684\u4f9d\u8d56\u56fe\uff0c\u518d\u6309\u62d3\u6251\u987a\u5e8f\u9012\u5f52\u5b9e\u4f8b\u5316\u3002\u5f53\u5b83\u53d1\u73b0\u67d0\u4e2a\u6784\u9020\u51fd\u6570\u53c2\u6570\u7684\u7c7b\u578b\u5143\u6570\u636e\u7f3a\u5931\uff08\u4f8b\u5982\u63a5\u53e3\u7c7b\u578b\u5728\u8fd0\u884c\u65f6\u88ab\u64e6\u9664\uff09\uff0c\u5c31\u4f1a\u629b\u51fa <code>Nest can't resolve dependencies<\/code> \u9519\u8bef\u2014\u2014\u8fd9\u6b63\u662f\u65b0\u624b\u6700\u5e38\u89c1\u7684\u62a5\u9519\u6765\u6e90\u3002<\/p>\n<div class=\"doc-table-wrapper\">\n<table class=\"doc-table\">\n<thead>\n<tr>\n<th>\u673a\u5236<\/th>\n<th>\u4f5c\u7528<\/th>\n<th>\u5e38\u89c1\u6545\u969c<\/th>\n<th>\u6392\u67e5\u624b\u6bb5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>emitDecoratorMetadata<\/td>\n<td>\u751f\u6210\u6784\u9020\u51fd\u6570\u53c2\u6570\u7c7b\u578b\u5143\u6570\u636e<\/td>\n<td>tsconfig \u672a\u5f00\u542f\u5bfc\u81f4\u6ce8\u5165\u5931\u8d25<\/td>\n<td>\u68c0\u67e5 tsconfig.json \u7f16\u8bd1\u9009\u9879<\/td>\n<\/tr>\n<tr>\n<td>@Injectable()<\/td>\n<td>\u6807\u8bb0\u7c7b\u4e3a\u53ef\u6ce8\u5165 Provider<\/td>\n<td>\u5fd8\u8bb0\u6807\u6ce8\u5bfc\u81f4\u5bb9\u5668\u65e0\u6cd5\u8bc6\u522b<\/td>\n<td>\u68c0\u67e5 Provider \u662f\u5426\u5728\u6a21\u5757 providers \u4e2d\u6ce8\u518c<\/td>\n<\/tr>\n<tr>\n<td>\u6a21\u5757 exports<\/td>\n<td>\u63a7\u5236 Provider \u7684\u53ef\u89c1\u6027<\/td>\n<td>\u8de8\u6a21\u5757\u6ce8\u5165\u62a5\u9519<\/td>\n<td>\u786e\u8ba4\u76ee\u6807\u6a21\u5757\u5df2 exports \u8be5 Provider<\/td>\n<\/tr>\n<tr>\n<td>Token \u5339\u914d<\/td>\n<td>\u6309\u7c7b\u578b\u6216\u5b57\u7b26\u4e32 Token \u67e5\u627e\u5b9e\u4f8b<\/td>\n<td>\u63a5\u53e3\u7c7b\u578b\u65e0\u6cd5\u4f5c\u4e3a Token<\/td>\n<td>\u4f7f\u7528 @Inject(&#8216;TOKEN&#8217;) \u663e\u5f0f\u6307\u5b9a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 class=\"doc-h2\">\u56db\u3001\u4ece Express \u8fc1\u79fb\u5230 NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u51b3\u7b56\u77e9\u9635<\/h2>\n<p class=\"doc-p\">\u5e76\u975e\u6240\u6709\u9879\u76ee\u90fd\u503c\u5f97\u8fc1\u79fb\u3002\u4f5c\u4e3a\u67b6\u6784\u5e08\uff0c\u6211\u5efa\u8bae\u7528\u4e00\u5f20\u51b3\u7b56\u77e9\u9635\u6765\u5224\u65ad\uff0c\u800c\u4e0d\u662f\u88ab\u201c\u6846\u67b6\u6f6e\u6d41\u201d\u88f9\u631f\u3002<\/p>\n<div class=\"doc-table-wrapper\">\n<table class=\"doc-table\">\n<thead>\n<tr>\n<th>\u8bc4\u4f30\u7ef4\u5ea6<\/th>\n<th>Express \u539f\u751f<\/th>\n<th>NestJS \u5de5\u7a0b\u5316\u67b6\u6784<\/th>\n<th>\u67b6\u6784\u5efa\u8bae<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u8def\u7531\u89c4\u6a21<\/td>\n<td>&lt; 10 \u4e2a\u63a5\u53e3<\/td>\n<td>&gt; 20 \u4e2a\u63a5\u53e3\u6216\u6301\u7eed\u589e\u957f<\/td>\n<td><span class=\"badge-tag-green\">\u89c4\u6a21\u589e\u957f\u5373\u8fc1\u79fb<\/span><\/td>\n<\/tr>\n<tr>\n<td>\u56e2\u961f\u534f\u4f5c<\/td>\n<td>1-2 \u4eba\u81ea\u7531\u53d1\u6325<\/td>\n<td>3 \u4eba\u4ee5\u4e0a\u9700\u5f3a\u7ea6\u675f<\/td>\n<td><span class=\"badge-tag-green\">\u591a\u4eba\u534f\u4f5c\u4f18\u5148 NestJS<\/span><\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u6d4b\u8bd5\u6027<\/td>\n<td>\u9700\u624b\u52a8 mock \u4f9d\u8d56<\/td>\n<td>DI \u5929\u7136\u652f\u6301\u66ff\u8eab\u6ce8\u5165<\/td>\n<td><span class=\"badge-tag-green\">\u6d4b\u8bd5\u8986\u76d6\u7387\u63d0\u5347\u663e\u8457<\/span><\/td>\n<\/tr>\n<tr>\n<td>\u5b66\u4e60\u6210\u672c<\/td>\n<td>\u4f4e\uff0c\u4e0a\u624b\u5feb<\/td>\n<td>\u4e2d\u9ad8\uff0c\u9700\u7406\u89e3 DI \u4e0e\u88c5\u9970\u5668<\/td>\n<td><span class=\"badge-tag-green\">\u4e00\u6b21\u6027\u6295\u5165\u957f\u671f\u6536\u76ca<\/span><\/td>\n<\/tr>\n<tr>\n<td>\u7c7b\u578b\u5b89\u5168<\/td>\n<td>\u53ef\u9009 JS<\/td>\n<td>\u5f3a\u5236 TypeScript<\/td>\n<td><span class=\"badge-tag-green\">\u5927\u578b\u9879\u76ee\u5fc5\u9009<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"doc-callout doc-callout-info\">\n<div class=\"doc-callout-title\">\ud83d\udca1 \u67b6\u6784\u6838\u5fc3\u51b3\u7b56<\/div>\n<p>\u8fc1\u79fb\u7b56\u7565\u5efa\u8bae\u201c\u7ede\u6740\u8005\u6a21\u5f0f\u201d\uff1a\u65b0\u63a5\u53e3\u7528 NestJS \u7f16\u5199\uff0c\u65e7 Express \u8def\u7531\u901a\u8fc7\u53cd\u5411\u4ee3\u7406\u9010\u6b65\u4e0b\u7ebf\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u91cd\u5199\u3002\u8fd9\u6837\u98ce\u9669\u53ef\u63a7\uff0c\u56e2\u961f\u4e5f\u80fd\u5728\u771f\u5b9e\u4e1a\u52a1\u4e2d\u9010\u6b65\u638c\u63e1 NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u5951\u7ea6\u3002<\/p><\/div>\n<h2 class=\"doc-h2\">\u4e94\u3001\u751f\u4ea7\u843d\u5730\u6700\u4f73\u5b9e\u8df5\u4e0e\u907f\u5751\u6e05\u5355<\/h2>\n<h3 class=\"doc-h3\">5.1 \u6a21\u5757\u8fb9\u754c\u5212\u5206\u4e09\u539f\u5219<\/h3>\n<ul class=\"doc-list\">\n<li><strong>\u6309\u4e1a\u52a1\u7279\u6027\u800c\u975e\u6280\u672f\u5206\u5c42\u5207\u6a21\u5757<\/strong>\uff1aUsersModule \u5305\u542b\u81ea\u5df1\u7684 controller\u3001service\u3001entity\uff0c\u800c\u4e0d\u662f\u5168\u5c40 controller \u76ee\u5f55\u3002<\/li>\n<li><strong>\u5171\u4eab\u80fd\u529b\u4e0b\u6c89\u4e3a\u72ec\u7acb\u6a21\u5757<\/strong>\uff1a\u65e5\u5fd7\u3001\u914d\u7f6e\u3001\u6570\u636e\u5e93\u8fde\u63a5\u62bd\u6210 SharedModule \u6216 CoreModule\uff0c\u901a\u8fc7 exports \u66b4\u9732\u3002<\/li>\n<li><strong>\u7981\u6b62\u8de8\u6a21\u5757\u76f4\u63a5\u8bbf\u95ee\u5185\u90e8 Provider<\/strong>\uff1a\u53ea\u901a\u8fc7 exports \u7684\u5951\u7ea6\u4ea4\u4e92\uff0c\u4fdd\u6301\u6a21\u5757\u53ef\u72ec\u7acb\u6f14\u8fdb\u3002<\/li>\n<\/ul>\n<h3 class=\"doc-h3\">5.2 \u5168\u5c40\u7ba1\u9053\u4e0e\u5f02\u5e38\u8fc7\u6ee4\u5668\u914d\u7f6e<\/h3>\n<p class=\"doc-p\">\u751f\u4ea7\u73af\u5883\u5fc5\u987b\u5728 <code>main.ts<\/code> \u4e2d\u542f\u7528\u5168\u5c40\u6821\u9a8c\u7ba1\u9053\u4e0e\u7edf\u4e00\u5f02\u5e38\u8fc7\u6ee4\u5668\uff0c\u5426\u5219 DTO \u6821\u9a8c\u5f62\u540c\u865a\u8bbe\uff0c\u9519\u8bef\u54cd\u5e94\u683c\u5f0f\u4e5f\u4f1a\u4e94\u82b1\u516b\u95e8\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\" data-enlighter-title=\"main.ts\">import { NestFactory } from '@nestjs\/core';\nimport { ValidationPipe } from '@nestjs\/common';\nimport { AppModule } from '.\/app.module';\n\nasync function bootstrap() {\n  const app = await NestFactory.create(AppModule);\n  app.useGlobalPipes(\n    new ValidationPipe({\n      whitelist: true,        \/\/ \u5265\u79bb\u672a\u58f0\u660e\u5b57\u6bb5\n      forbidNonWhitelisted: true, \/\/ \u51fa\u73b0\u591a\u4f59\u5b57\u6bb5\u76f4\u63a5\u62a5\u9519\n      transform: true,        \/\/ \u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\n    }),\n  );\n  await app.listen(3000);\n}\nbootstrap();<\/pre>\n<div class=\"doc-callout doc-callout-danger\">\n<div class=\"doc-callout-title\">\ud83d\udea8 \u4e25\u91cd\u9690\u60a3\u544a\u8b66<\/div>\n<p>\u751f\u4ea7\u73af\u5883\u5207\u52ff\u5f00\u542f <code>synchronize: true<\/code>\uff08TypeORM \u81ea\u52a8\u540c\u6b65\u8868\u7ed3\u6784\uff09\uff0c\u5b83\u4f1a\u5728\u5b9e\u4f53\u53d8\u66f4\u65f6\u9759\u9ed8\u4fee\u6539\u751a\u81f3\u5220\u9664\u751f\u4ea7\u8868\u5b57\u6bb5\u3002\u52a1\u5fc5\u4f7f\u7528 migration \u7ba1\u7406\u6570\u636e\u5e93\u53d8\u66f4\uff0c\u5e76\u5728 CI \u4e2d\u6821\u9a8c migration \u4e0e\u5b9e\u4f53\u7684\u4e00\u81f4\u6027\u3002<\/div>\n<h3 class=\"doc-h3\">5.3 \u6d4b\u8bd5\u66ff\u8eab\u4e0e\u53ef\u6d4b\u8bd5\u6027<\/h3>\n<p class=\"doc-p\">NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u6700\u5927\u7ea2\u5229\u4e4b\u4e00\uff0c\u662f\u5355\u5143\u6d4b\u8bd5\u53ef\u4ee5\u8f7b\u677e\u6ce8\u5165 mock\u3002\u4f7f\u7528 <code>Test.createTestingModule<\/code> \u5373\u53ef\u66ff\u6362\u4efb\u610f Provider\uff0c\u65e0\u9700\u542f\u52a8\u771f\u5b9e\u6570\u636e\u5e93\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\" data-enlighter-title=\"users.service.spec.ts\">import { Test } from '@nestjs\/testing';\nimport { UsersService } from '.\/users.service';\nimport { getRepositoryToken } from '@nestjs\/typeorm';\nimport { User } from '.\/entities\/user.entity';\n\ndescribe('UsersService', () =&gt; {\n  let service: UsersService;\n  const mockRepo = { findOneBy: jest.fn().mockResolvedValue({ id: 1, name: 'Alice' }) };\n\n  beforeEach(async () =&gt; {\n    const moduleRef = await Test.createTestingModule({\n      providers: [\n        UsersService,\n        { provide: getRepositoryToken(User), useValue: mockRepo },\n      ],\n    }).compile();\n    service = moduleRef.get(UsersService);\n  });\n\n  it('should return user by id', async () =&gt; {\n    await expect(service.findOne(1)).resolves.toEqual({ id: 1, name: 'Alice' });\n  });\n});<\/pre>\n<details class=\"doc-accordion\">\n<summary>\u70b9\u51fb\u5c55\u5f00\uff1aNestJS CLI \u811a\u624b\u67b6\u4e0e\u8d44\u6e90\u751f\u6210\u547d\u4ee4<\/summary>\n<div class=\"doc-accordion-content\">\n<pre><code class=\"language-bash\"># \u5168\u5c40\u5b89\u88c5 CLI\nnpm i -g @nestjs\/cli\n\n# \u521b\u5efa\u65b0\u9879\u76ee\nnest new my-api\n\n# \u751f\u6210\u5b8c\u6574 CRUD \u8d44\u6e90\uff08controller + service + dto + entity + tests\uff09\nnest g resource users\n\n# \u542f\u52a8\u5f00\u53d1\u6a21\u5f0f\uff08\u70ed\u91cd\u8f7d\uff09\nnpm run start:dev<\/code><\/pre>\n<\/div>\n<\/details>\n<h2 class=\"doc-h2\">\u516d\u3001\u603b\u7ed3\uff1aNestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u957f\u671f\u4ef7\u503c<\/h2>\n<p class=\"doc-p\">NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u4e0d\u662f\u94f6\u5f39\uff0c\u5b83\u6709\u5b66\u4e60\u66f2\u7ebf\uff0c\u5f3a\u5236 TypeScript\uff0c\u88c5\u9970\u5668\u4e0e\u6ce8\u5165\u5728\u51fa\u9519\u65f6\u786e\u5b9e\u4f1a\u8ba9\u4eba\u56f0\u60d1\u3002\u4f46\u5b83\u7684\u4ef7\u503c\u5728\u4e8e\u628a\u201c\u540e\u7aef\u5e94\u8be5\u5982\u4f55\u7ec4\u7ec7\u201d\u8fd9\u4e2a\u56e2\u961f\u7ea7\u95ee\u9898\uff0c\u8f6c\u5316\u4e3a\u6846\u67b6\u7ea7\u7684\u5f3a\u7ea6\u675f\u3002\u5f53\u4f60\u7684\u9879\u76ee\u4ece 5 \u4e2a\u63a5\u53e3\u589e\u957f\u5230 50 \u4e2a\u3001\u4ece 1 \u4eba\u5f00\u53d1\u53d8\u6210 3 \u4eba\u534f\u4f5c\u65f6\uff0c\u8fd9\u5957\u5951\u7ea6\u5e26\u6765\u7684\u79e9\u5e8f\u611f\u4e0e\u53ef\u6d4b\u8bd5\u6027\uff0c\u4f1a\u8fdc\u8fdc\u8d85\u8fc7\u521d\u671f\u7684\u5b66\u4e60\u6210\u672c\u3002<\/p>\n<p class=\"doc-p\">\u6211\u7684\u5efa\u8bae\u662f\uff1a\u5148\u7528 CLI \u811a\u624b\u67b6\u8dd1\u901a\u4e00\u4e2a\u771f\u5b9e\u8d44\u6e90\uff0c\u7136\u540e\u523b\u610f\u9605\u8bfb\u751f\u6210\u7684\u4ee3\u7801\u800c\u4e0d\u662f\u628a\u5b83\u5f53\u9ed1\u76d2\uff1b\u7406\u89e3\u6a21\u5757 exports 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href=\"https:\/\/btc354.com\/index.php\/2026\/11\/12\/pulsemate-security-c10ab0ea41a52a49b3a442813b9933cd5e000598836908df3ae26030612f891f\/\">Node.js \u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e\u6df1\u5ea6\u5256\u6790\uff1aVOS \u96f6\u63a5\u89e6\u90e8\u7f72\u670d\u52a1 CVE-2026-107240 \u7684\u9003\u9038\u94fe\u4e0e\u4fee\u590d\u5b9e\u6218<\/a><\/li>\n<li><strong>\u63a8\u8350\u6df1\u5ea6\u9605\u8bfb\uff1a<\/strong><a href=\"https:\/\/btc354.com\/index.php\/2026\/11\/12\/pulsemate-security-e8c78ae15bcff261492b6d493d220a541900e7ee96ec02a5c0db270cc5d6d4af\/\">Node.js HTTP\/2 \u5185\u5b58\u6cc4\u6f0f\u9ad8\u5371\u6f0f\u6d1e\u6df1\u5ea6\u590d\u76d8\uff1aCVE-2026-123865 \u7684 GOAWAY \u7ade\u6001\u4e0e\u60ac\u6302\u4f1a\u8bdd\u6839\u56e0\u62c6\u89e3<\/a><\/li>\n<li><strong>\u5168\u7ad9\u6280\u672f\u5f52\u6863\uff1a<\/strong><a href=\"https:\/\/btc354.com\/\">\u8fd4\u56de \u4e2a\u4eba\u5b66\u4e60\u7ad9\u70b9 \u9996\u9875\u63a2\u7d22\u66f4\u591a\u6280\u672f\u524d\u6cbf<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"doc-ref-box\">\n  <strong>\u539f\u6587\u51fa\u5904\u4e0e\u6743\u5a01\u6eaf\u6e90\u58f0\u660e\uff1a<\/strong><br \/>\n  \u672c\u6587\u6838\u5fc3\u6280\u672f\u80cc\u666f\u6e90\u81ea\u6d77\u5916\u4e00\u7ebf\u6280\u672f\u793e\u533a\u7814\u7a76\uff1a<br \/>\n  <a href=\"https:\/\/dev.to\/arhan_khan\/nestjs-for-beginners-build-structured-nodejs-apis-that-scale-with-your-team-2207\" target=\"_blank\" rel=\"noopener noreferrer\">NestJS for Beginners: Build Structured Node.js APIs That Scale With Your Team (Arhan Khan \/ DEV Community)<\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4ece Express \u8def\u7531\u6ce5\u6f6d\u5230\u4f01\u4e1a\u7ea7\u5206\u5c42\uff0c\u6df1\u5ea6\u62c6\u89e3 NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u7684\u6a21\u5757\u3001\u63a7\u5236\u5668\u3001\u670d\u52a1\u4e0e\u4f9d\u8d56\u6ce8\u5165\u5185\u6838\u3002\u672c\u6587\u4ee5\u8d44\u6df1\u67b6\u6784\u5e08\u89c6\u89d2\u5256\u6790\u88c5\u9970\u5668\u5143\u7f16\u7a0b\u4e0e IoC \u5bb9\u5668\u539f\u7406\uff0c\u7ed9\u51fa\u6a21\u5757\u8fb9\u754c\u5212\u5206\u3001Provider \u4f5c\u7528\u57df\u4e0e\u6d4b\u8bd5\u66ff\u8eab\u843d\u5730\u8303\u5f0f\uff0c\u5e76\u9644 Express \u8fc1\u79fb\u51b3\u7b56\u77e9\u9635\u4e0e\u751f\u4ea7\u907f\u5751\u6e05\u5355\uff0c\u52a9\u56e2\u961f\u5728\u4e94\u5341\u6761\u8def\u7531\u540e\u4f9d\u7136\u4fdd\u6301\u53ef\u7ef4\u62a4\u3001\u53ef\u6d4b\u8bd5\u3001\u53ef\u6269\u5c55\u7684\u540e\u7aef\u9aa8\u67b6\u3002<\/p>\n","protected":false},"author":2,"featured_media":1076,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[97],"tags":[633,108,635,634,636],"class_list":["post-1075","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","tag-nestjs","tag-node-js","tag-typescript","tag-634","tag-636"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u5b9e\u6218\uff1a\u4ece Express 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\u8fc1\u79fb\u51b3\u7b56\u77e9\u9635\u4e0e\u751f\u4ea7\u907f\u5751\u6e05\u5355\uff0c\u52a9\u56e2\u961f\u5728\u4e94\u5341\u6761\u8def\u7531\u540e\u4f9d\u7136\u4fdd\u6301\u53ef\u7ef4\u62a4\u3001\u53ef\u6d4b\u8bd5\u3001\u53ef\u6269\u5c55\u7684\u540e\u7aef\u9aa8\u67b6\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/btc354.com\/index.php\/2026\/11\/15\/nestjs-\u5de5\u7a0b\u5316\u67b6\u6784\u5b9e\u6218\uff1a\u4ece-express-\u8def\u7531\u6ce5\u6f6d\u5230\u6a21\u5757\u5316\u53ef\u6269\u5c55\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NestJS \u5de5\u7a0b\u5316\u67b6\u6784\u5b9e\u6218\uff1a\u4ece Express \u8def\u7531\u6ce5\u6f6d\u5230\u6a21\u5757\u5316\u53ef\u6269\u5c55\u540e\u7aef\u7684\u5206\u5c42\u843d\u5730\u6307\u5357 - \u4e2a\u4eba\u5b66\u4e60\u7ad9\u70b9\" 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