express（body-parser插件获取数据）

• npm install body-parser --save

const express = require('express');
const bodyParser = require('body-parser');
const app = express();
// 启动静态资源服务
app.use(express.static('public'));
// 处理表单提交的数据（默认表单的提交格式）
app.use(bodyParser.urlencoded({extended : false}));
// 处理 json 形式数据
app.use(bodyParser.json());
app.post('/login', (req, res) => {
    console.log(req.body);
    if (req.body.username == 'admin' && req.body.password == '123') {
        res.send('success post');
    }else{
        res.send('failure');
    }
});
app.get('/login', (req, res) => {
    console.log(req.query);
    if (req.query.username == 'admin' && req.query.password == '123') {
        res.send('success get');
    }else{
        res.send('failure');
    }
});
app.put('/login', (req, res) => {
    console.log(req.body);
    if (req.body.username == 'admin' && req.body.password == '123') {
        res.send('success put');
    }else{
        res.send('failure');
    }
});
app.delete('/login', (req, res) => {
    console.log(req.body);
    if (req.body.id == '1234') {
        res.send('success delete');
    }else{
        res.send('failure');
    }
})
app.listen(3000, () => {
    console.log('running……');
})

public/login.html

    
        
        
        
        
    
    
        
 ---提交地址和提交的方式
            用户名:

            密  码:

              ----用于正常的表单提交
        
          -----用于ajax