页面脚本：

复制代码 代码如下:

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：

复制代码 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;