Express 获取参数的三种方法

获取参数

express获取参数有三种方法：

req.query

req.body

req.params

1.

req.query

适合get请求

//获取数据
app.get('/form', function(req, res) {
var num = req.query.num;
res.send("你获取的get数据为:" + num);
});

2.

req.body

适合post请求

body-parser

npm body-parser --save

var express = require('express');
var app = express();
//引入body-parser
var bodyParser = require('body-parser');
app.use(express.static('public'));

//需要use的
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({
extended: true
})); // for parsing application/x-www-form-urlencoded

//获取数据
app.post('/form', function(req, res) {
var num = req.body.num;
res.send("你获取的post数据为:" + num);
});

//设置监听端口
app.listen(3000);

3.

req.params

, 适用于URL获取参数

var express = require('express');
var app = express();

//获取数据
app.get('/form/:num', function(req, res) {
var num = req.params.num;
res.send("你获取到form/后的参数:" + num);
});

//设置监听端口
app.listen(3000);