# node+express创建简单接口

**Repository Path**: paofuniuniu/Create-a-simple-interface-with-node-and-express

## Basic Information

- **Project Name**: node+express创建简单接口
- **Description**: 使用node.js和express框架，制作简单的get、post增删改查接口
- **Primary Language**: Unknown
- **License**: BSD-3-Clause
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2023-10-17
- **Last Updated**: 2024-10-10

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# node+express创建简单接口

#### 介绍
使用node.js和express框架，制作简单的get、post增删改查接口

#### 安装教程
1.  npm install
2.  npm run dev
3.  用postman等工具分别访问4个接口，查看结果
- get: http://localhost:8888/books/select
- post: http://localhost:8888/books/del/id/1
- post: http://localhost:8888/books/update/id/1/name/newname
- post: http://localhost:8888/books/add/name/demobook


#### 说明
1. 全局安装node和express
2. 全局安装express应用生成器，用于调试，npm install express-generator -g，并在package.json-scripts里配置好
安装这个工具后，不需要每次更改文件后都重新编译整个项目
```
"scripts": {
    "start": "node ./bin/www",
    "dev": "nodemon ./bin/www"
  },
```
3. 在routers目录下创建文件books.js，用于编写4个接口

```
var express = require('express');
var router = express.Router();

var BOOKS = [
  { id:1, name:'book1' },
  { id:2, name:'book2' },
  { id:3, name:'book3' },
]

/* books listing. */
// 查询所有图书 get:http://localhost:8888/books/select
router.get('/select', function(req, res, next) {
  res.send(BOOKS);
});

// 删除某本图书 post:http://localhost:8888/books/del/id/1
router.post('/del/id/:id', function(req, res, next) {
  let id = parseInt(req.params.id)
  BOOKS = BOOKS.filter(it=>it.id !== id)
  res.send(BOOKS);
});

// 修改某本图书 post:http://localhost:8888/books/update/id/1/name/newname
router.post('/update/id/:id/name/:name', function(req, res, next) {
  let {id,name} = req.params
  BOOKS = BOOKS.map(it=>{
    if(it.id === parseInt(id)){
      return{
        id:it.id,
        name,
      }
    }else return it
  })
  res.send(BOOKS);
});

// 新增图书 post:http://localhost:8888/books/add/name/demobook
router.post('/add/name/:name', function(req, res, next) {
  let name = req.params.name
  BOOKS.push({
    id:parseInt(BOOKS.length+1),
    name,
  })
  res.send(BOOKS);
});

module.exports = router;
```

5.在app.js中注入接口

```
var booksRouter = require('./routes/books');
app.use('/books', booksRouter);
```