<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
</body>
<script type="text/javascript">
//ajax_all_Filed
// https://blog.csdn.net/qq_33285292/article/details/76147450
// 封装ajax函数
// @param {string}opt.type http连接的方式，包括POST和GET两种方式
// @param {string}opt.url 发送请求的url
// @param {boolean}opt.async 是否为异步请求，true为异步的，false为同步的
// @param {object}opt.data 发送的参数，格式为对象类型
// @param {function}opt.success ajax发送并接收成功调用的回调函数
function ajax(opt) {
try{
opt = opt || {};
opt.method = opt.method.toUpperCase() || ‘POST‘;
opt.url = opt.url || ‘‘;
opt.async = opt.async || true;
opt.data = opt.data || null;
opt.success = opt.success || function () {};
opt.error = opt.error || function () {};
var xmlHttp = null;
if (XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
}
else {
xmlHttp = new ActiveXObject(‘Microsoft.XMLHTTP‘);
}var params = [];
for (var key in opt.data){
params.push(key + ‘=‘ + opt.data[key]);
}
var postData = params.join(‘&‘);
if (opt.method.toUpperCase() === ‘POST‘) {
xmlHttp.open(opt.method, opt.url, opt.async);
xmlHttp.setRequestHeader(‘Content-Type‘, ‘application/x-www-form-urlencoded;charset=utf-8‘);
xmlHttp.setRequestHeader(‘Accept‘, ‘application/json, text/javascript, */*‘);
xmlHttp.send(postData);
}
else if (opt.method.toUpperCase() === ‘GET‘) {
xmlHttp.open(opt.method, opt.url + ‘?‘ + postData, opt.async);
xmlHttp.send(null);
}
xmlHttp.onreadystatechange = function () {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
var res = JSON.parse(xmlHttp.responseText);
if(res.code !=200){
//全局处理异常
}
opt.success(res);
}else if(xmlHttp.readyState == 4 && xmlHttp.status == 0){
opt.error("Your url is error");//错误
}else if(xmlHttp.readyState == 4 && xmlHttp.status != 200){
opt.error(xmlHttp.responseText);//错误
}
//console.log(xmlHttp.readyState,xmlHttp.status);
//console.log(xmlHttp.readyState,xmlHttp.status);
};
}catch(e){
opt.error(e);//错误
}
}
// 使用
// error:function(ev) {
ajax({
method: ‘get‘,
url: ‘http://106.15.196.194:3333/Getlist‘,
async:true,
data: {
name1: ‘value1‘,
name2: ‘value2‘
},
success: function (response) {
//console.log(response);
},
error:function(e){
console.log(e);
}
});
</script>
</html>
原文：https://www.cnblogs.com/shaozhu520/p/10917863.html