struts2 ajax一个很经典的小例子

转载自：http://blog.163.com/zhk_hoba/blog/static/140738113201301623833461/

1、将struts2的json插件加入web工程的lib，jsonplugin的下载地址：http://code.google.com/p/jsonplugin/downloads/list

2、struts.xml添加专为ajax使用的package

<package name="ajax" extends="json-default">

        <action name="ajaxRequest"

            class="org.david.struts2.HelloWorld">

            <result type="json"></result>

        </action>

    </package>

3、helloworld.jsp

           <SCRIPT type="text/javascript" src="js/jquery-1.2.6.min.js"></script>

        <SCRIPT type="text/javascript">

            function clickButton()

            {    

                var url = 'ajaxRequest.action';

                var params = {

                        name:$('#name').attr('value')

                };

                jQuery.post(url, params, callbackFun, 'json');

            }

            function callbackFun(data)

            {

                alert(data.result);//对应HelloWorld类的message属性

                    //获取数据后渲染页面

            }

        </SCRIPT>

        <input id="name" type="text">

        <input type="button" value="ok" onclick="javascript:clickButton();">

4、HelloWorld.java

package org.david.struts2;

public class HelloWorld {

    private String name;

    private String result;

    // ajax请求参数赋值

    public void setName(String name) {

        this.name = name;

    }

    // ajax返回结果

    public String getResult() {

        return result;

    }

    public String execute() {

        this.result = "Hello! " + this.name + ".";

        return "success";

    }

}