举个例子 jsp页面：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'ajax.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <script type="text/javascript" src="<%=basePath%>res/jquery-1.4.4.min.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("#button").bind("click",function(){ $.ajax({ type:"post", url:"<%=basePath%>ajax.action", data:"array="+$("#text").val(), datatype:"json", success:function(msg){ alert(msg); }, error:function() { alert("失败"); } }); }) }); </script> </head> <body> <input id = "text" type = "text" > <input id = "button" type = "button" value ="提交"> </body> </html>
后台：
package test;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.Action;
public class ajax {
private String str;
public String ajax()
{
HttpServletRequest request = ServletActionContext.getRequest();
str = "action处理请求后返回给ajax参数："+request.getParameter("array");
System.out.println(request.getParameter("array"));
return Action.SUCCESS;
}
public String getStr() {
return str;
}
public void setStr(String str) {
this.str = str;
}
}
Struts2 配置文件：
<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
<constant name="struts.i18n.encoding" value="UTF-8"/>
<package name="example" extends="json-default">
<action name = "ajax" class = "test.ajax" method = "ajax">
<result type = "json">
<param name = "root">str</param>
</result>
</action>
<action name="*">
<result>/WEB-INF/content/{1}.jsp</result>
</action>
</package>
</struts>
所用到的jar包：
所用到的jQuery文件，自行下载。
转载请注明出处。