<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
//1. 创建核心对象
var xhttp;
if (window.XMLHttpRequest){
xhttp = new XMLHttpRequest();
}else {
//code for IE6 IE5
xhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
//2. 发送请求
xhttp.open("GET","http://localhost:8080/ajax-demo/ajaxServlet");
xhttp.send();
//3. 获取响应
xhttp.onreadystatechange = function () {
if (xhttp.readyState == 4 && xhttp.status == 200){
alert(xhttp.responseText);
}
}
</script>
</body>
</html>
标签：status,XMLHttpRequest,入门,xhttp,AJAX,new,快速 From： https://www.cnblogs.com/Karl-hut/p/17522966.html