Get form post request body data in express

There is no API provided in express to get the post request body data, so a plug-in ( body-parser) is needed to get it

1. installation

   npm install --save body-parser
   

2. Configure and use

   let express = require('express');
   // 引入包
   let bodyParser = require('body-parser');
   let app = express();
   //配置body-parser
   // 只要加上这个配置，则在req请求对象上会多出来一个属性：body
   // 因此可以直接通过req.body来获取表单post请求体数据
   app.use(bodyParser.urlencoded({
         
         extended: false}));
   app.use(bodyParser.json());
   app.post('/post',(req,res) => {
         
         
       // 通过req.body来获取表单post请求体数据
       res.send(req.body);
   })