利用Ajax实现在脚本里传值实例介绍

function ajaxSave(URLS) { 
//定义一个变量用于存放XMLHttpRequest对象 
var xmlhttp; 
//定义一个变量用于存放 从服务器返回的响应结果 
var responseContext = ""; 
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari 
xmlhttp = new XMLHttpRequest(); 
} else {// code for IE6, IE5 
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
} 
xmlhttp.onreadystatechange = function() { 
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) { 

responseContext = xmlhttp.responseText; 
alert(responseContext); 
} 
} 

xmlhttp.open("POST", URLS, true); 
xmlhttp.setRequestHeader("Content-Type", 
"application/x-www-form-urlencoded"); 
xmlhttp.send(); 
} 
 
后台方法： 
 代码如下:

Boolean boolean1; 
String reponseText = ""; 
if(boolean1){ 
reponseText="保存成功！"; 
} 
else{ 
reponseText="保存失败！"; 
} 
HttpServletResponse response = ServletActionContext.getResponse(); 
response.setContentType("text/plain"); 
response.setCharacterEncoding("UTF-8"); 
PrintWriter out = response.getWriter(); 
out.println(reponseText); 
out.flush(); 
out.close(); 
return null;