// 引用expess框架
const express = require('express');
// 处理路径
const path = require('path');
const bodyParser = require('body-parser');
// 创建网站服务器
const app = express();
app.use(bodyParser.urlencoded());
app.get('/first', (req, res) => {
res.send('hello geyao')
})
app.get('/responsdate', (req, res) => {
res.send({ "name": "geyao" })
})
app.post('/post', (req, res) => {
res.send(req.body);
})
app.get('/get', (req, res) => {
res.send(req.query);
})
app.use(express.static(path.join(__dirname)));
// 监听端口
app.listen(3000);
console.log('网站服务器启动成功, 请访问localhost')ajax3.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<p>
<input type="text" id="username">
</p>
<p>
<input type="text" id="age">
</p>
<p>
<input type="button" value="提交" name="" id="btn">
</p>
<script>
var btn = document.getElementById('btn');
var username = document.getElementById('username');
var password = document.getElementById('age');
btn.onclick = function() {
//1创建ajax对象
var xhr = new XMLHttpRequest();
//请求方式
var nameValue = username.value;
var ageValue = age.value;
//
var params = 'username=' + nameValue + '&&age=' + ageValue;
xhr.open('post', 'http://localhost:3000/post');
//设置参数请求格式类型
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send(params);
//发送请求
//获取数据
xhr.onload = function() {
console.log(xhr.responseText);
}
}
</script>
</body>
</html>运行结果
