Nest.js系列学习之初识nest项目框架及服务

// 全局安装nestjs脚手架
npm i -g @nestjs/cli
// 使用脚手架新建项目
nest new project-name

.
├── README.md // 说明文件
├── dist // 打包生成的文件
│   ├── app.controller.d.ts
│   ├── app.controller.js
│   ├── app.controller.js.map
│   ├── app.module.d.ts
│   ├── app.module.js
│   ├── app.module.js.map
│   ├── app.service.d.ts
│   ├── app.service.js
│   ├── app.service.js.map
│   ├── common
│   ├── main.d.ts
│   ├── main.js
│   ├── main.js.map
│   ├── modules
│   └── tsconfig.build.tsbuildinfo
├── nest-cli.json // nestjs配置文件
├── package.json // npm 包文件
├── src // 开发源码文件
│   ├── app.controller.spec.ts
│   ├── app.controller.ts // 控制器路由
│   ├── app.module.ts // 模块文件
│   ├── app.service.ts // 服务文件
│   └── main.ts // 入口主文件
├── tsconfig.build.json
├── tsconfig.json
└── yarn.lock

yarn start:dev
or
npm run start:dev
[10:01:56 PM] Starting compilation in watch mode...
[10:01:58 PM] Found 0 errors. Watching for file changes.
[Nest] 36861   - 01/31/2023, 10:01:59 PM   [NestFactory] Starting Nest application...
[Nest] 36861   - 01/31/2023, 10:01:59 PM   [InstanceLoader] AppModule dependencies initialized +15ms
[Nest] 36861   - 01/31/2023, 10:01:59 PM   [RoutesResolver] AppController {}: +8ms
[Nest] 36861   - 01/31/2023, 10:01:59 PM   [RouterExplorer] Mapped {, GET} route +3ms
[Nest] 36861   - 01/31/2023, 10:01:59 PM   [NestApplication] Nest application successfully started +2ms

// 创建控制器 hello
nest g controller hello 
or
nest g co hello

// 创建服务 hello
nest g service hello
or
nest g s hello

// 创建模块 hello
nest g module hello
or
nest g mo hello

// 创建一个功能模块资源
nest g resource hello
or 
nest g res hello

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  await app.listen(3000);
}
bootstrap();

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
@Module({
  imports: [],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

import { Controller, Get } from '@nestjs/common';
import { AppService } from './app.service';
@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}
  @Get()
  getHello(): string {
    return this.appService.getHello();
  }
}

import { Injectable } from '@nestjs/common';
@Injectable()
export class AppService {
  getHello(): string {
    return 'Hello World!';
  }
}