1.用jQuery发送Ajax请求
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</head>
<body>
<div class="container">
<h2 class="page-header">jQuery发送AJAX请求</h2>
<button class="btn btn-primary">GET</button>
<button class="btn btn-danger">POST</button>
<button class="btn btn-info">通用型方法AJAX</button>
</div>
<script>
$('button').eq(0).click(function(){
$.get('http://127.0.0.1:8000/jquery',{a:100,b:200},function(data){
console.log(data);
},'json')
})
$('button').eq(1).click(function(){
$.post('http://127.0.0.1:8000/jquery',{a:100,b:200},function(data){
console.log(data);
})
})
$('button').eq(2).click(function(){
$.ajax({
// url
url:'http://127.0.0.1:8000/jquery',
// 参数
data:{a:100,b:200},
// 请求类型
type:'GET',
// 成功的回调
success:function(data){
console.log(JSON.parse(data));
},
// 超时时间
timeout:2000,
// 失败的回调
error:function(){
console.log('出错啦!!!');
},
// 头信息
headers:{
c:300,
d:400
}
})
})
</script>
</body>
</html>
服务器用express框架创建简单的本地服务器
// 1.引入express
const express = require('express');
// 2.创建应用对象
const app = express();
// 3.创建路由规则
// request 是对请求报文的封装
// response 是对响应报文的封装
// jQuery 服务
app.all('/jquery',(request,response)=>{
response.setHeader('Access-Control-Allow-Origin','*');
response.setHeader('Access-Control-Allow-Headers','*');
const data = {
name:'yangy'
}
response.send(JSON.stringify(data));
})
// axios服务
app.all('/axios',(request,response)=>{
response.setHeader('Access-Control-Allow-Origin','*');
response.setHeader('Access-Control-Allow-Headers','*');
const data = {
name:'yangy'
}
response.send(JSON.stringify(data));
})
// fetch服务
app.all('/fetch',(request,response)=>{
response.setHeader('Access-Control-Allow-Origin','*');
response.setHeader('Access-Control-Allow-Headers','*');
const data = {
name:'yangy'
}
response.send(JSON.stringify(data));
})
// 4.监听端口启动
app.listen(8000,()=>{
console.log("服务已经启动，8000端口监听中...");
})
2.用axios发送请求
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
<script crossorigin="anonymous" src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.js"></script>
<title>axios 发送AJAX请求</title>
</head>
<body>
<button class="btn btn-primary">GET</button>
<button class="btn btn-success">POST</button>
<button class="btn btn-info">AJAX</button>
<script>
const btns = document.querySelectorAll('button');
// 配置 baseURL
axios.defaults.baseURL = 'http://127.0.0.1:8000';
btns[0].onclick = function(){
// GET请求
axios.get('/axios',{
// url 参数
params:{
id:100,
vip:7
},
// 请求头信息
headers:{
name:'yangy',
age:21
}
}).then(value =>{
console.log(value);
})
}
btns[1].onclick = function(){
axios.post('/axios',{ username:'admin',password:'admin' },{
// url
params:{
id:200,
vip:9
},
// 请求头参数
headers:{
height:180,
weight:180,
}
})
}
btns[2].onclick = function(){
axios({
// 请求方法
method:'POST',
// url
url:'/axios',
// url参数
params:{
vip:10,
level:30
},
// 头信息
headers:{
a:100,
b:200
},
// 请求体参数
data:{
username:'admin',
password:'admin'
}
}).then(response =>{
console.log(response);
// 响应状态码
console.log(response.status);
// 响应状态字符串
console.log(response.statusText);
// 响应头信息
console.log(response.headers);
// 响应体
console.log(response.data);
})
}
</script>
</body>
</html>
3.使用fetch函数发送ajax请求
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>fetch 发送 AJAX</title>
</head>
<body>
<button>AJAX请求</button>
<script>
const btn = document.querySelector('button');
btn.onclick = function () {
fetch('http://127.0.0.1:8000/fetch?vip=10', {
// 请求方法
method: 'POST',
// 请求头
headers: {
name: 'yangy'
},
// 请求体
body: 'username=admin&password=123456'
}).then(response => {
return response.json();
}).then(response=>{
console.log(response);
})
}
</script>
</body>
</html>
