struts2下实现的json传递list,object。

必须的jar：

java bean:

package upload.progress.action;

public class music {

    private String name;

    private String singer;

    private String source;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getSinger() {

        return singer;

    }

    public void setSinger(String singer) {

        this.singer = singer;

    }

    public String getSource() {

        return source;

    }

    public void setSource(String source) {

        this.source = source;

    }

}

struts2.xml配置：

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <!--

    <constant name="struts.enable.DynamicMethodInvocation" value="false" />

    <constant name="struts.devMode" value="false" />

    <include file="example.xml"/>

    <package name="default" namespace="/" extends="struts-default">

        <default-action-ref name="index" />

        <action name="index">

            <result type="redirectAction">

                <param name="actionName">HelloWorld</param>

                <param name="namespace">/example</param>

            </result>

        </action>

    </package>

     -->

     <package name="default" namespace="/Fileupload" extends="struts-default">

        <action name="practice" class="action.PracticeAction" method="practice_one">

            <result type="redirect" name="success">

                /js/uploadify.jsp

            </result>

        </action>

    </package>

    <!-- Add packages here -->

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

        <action name="ajaxTest1" class="action.ajaxTest1" method="ajaxTest">

            <result type="stream">

                <param name="contentType">text/html</param>

                <param name="inputName">inputStream</param>

            </result>

        </action>

        <action name="json" class="upload.progress.action.jsonTest1" method="returnMessage">

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

        </action>

        <action name="jsonMusic" class="upload.progress.action.jsonTest1" method="returnMusic">

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

        </action>

         <action name="jsonMusicList" class="upload.progress.action.jsonTest1" method="returnMusicList">

            <result name="success" type="json">

                <param name="root">musicList</param>

            </result>

        </action>

    </package>

</struts>

jsp页面：

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<%

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 'jsonTest1.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="">

    <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 src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

<script type="text/javascript">

    $(function(){

    $("#showMessage").click(function(){

        $.ajax({

            type: "POST",

            dataType: "json",

            url: "ajax/json.action",

            success: function(data){

                $("#message").html("<font color='red'>"+data.message+"</font>");

            }

        });

        });

        $("#showMusic").click(function(){

                $.ajax({

                    type : "POST",

                    dataType : "json",

                    url : "ajax/jsonMusic.action",

                    success : function(data){

                        $.each(data,function(i,item){

                            if(item!=null){

                                alert(item.name);

                            }

                        })

                    }

                });

            });

    $("#showList").click(function(){

                $.ajax({

                    type : "POST",

                    dataType : "json",

                    url : "ajax/jsonMusicList.action",

                    success : function(data){

                        $.each(data,function(i,item){

                            if(item!=null){

                            alert(item.name);

                            }

                        })

                    }

                });

            });

    });

</script>

  </head>

  <body>

    <table align="center">

        <tr>

            <td id="showMessage">Message</td>

            <td id="showMusic">showMusic</td>

            <td id="showList">showList</td>

        </tr>

    </table>

    <div id="message"></div>

  </body>

</html>

action：

package upload.progress.action;

import java.util.ArrayList;

import java.util.List;

import org.json.JSONArray;

import com.opensymphony.xwork2.ActionSupport;

public class jsonTest1 extends ActionSupport {

    /**

     * 处理json的action

     */

    private static final long serialVersionUID = -1519192049194890338L;

    private String message;

    private music Music;

    private List<music> musicList;

    public String returnMessage(){

        System.out.println("json invoking");

        message="json 字符串";

        return SUCCESS;

    }

    public String returnMusic(){

        Music =new music();

        Music.setName("忘情水");

        Music.setSinger("刘德华");

        Music.setSource("百度");

        return SUCCESS;

    }

    public String returnMusicList(){

        musicList=new ArrayList<music>();

        music Music1 =new music();

        Music1.setName("忘情水1");

        Music1.setSinger("刘德华1");

        Music1.setSource("百度1");

        music Music2 =new music();

        Music2.setName("忘情水2");

        Music2.setSinger("刘德华2");

        Music2.setSource("百度2");

        music Music3 =new music();

        Music3.setName("忘情水3");

        Music3.setSinger("刘德华3");

        Music3.setSource("百度3");

        musicList.add(Music1);

        musicList.add(Music2);

        musicList.add(Music3);

        return SUCCESS;

    }

    public String jsonArray(){

        List<String> list=new ArrayList<String>();

        JSONArray jsonArray=new JSONArray(list);

        return SUCCESS;

    }

    public String getMessage() {

        return message;

    }

    public void setMessage(String message) {

        this.message = message;

    }

    public music getMusic() {

        return Music;

    }

    public void setMusic(music music) {

        Music = music;

    }

    public List<music> getMusicList() {

        return musicList;

    }

    public void setMusicList(List<music> musicList) {

        this.musicList = musicList;

    }

    public static long getSerialversionuid() {

        return serialVersionUID;

    }

}

使用流的方式：

action：

package action;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.util.List;

import org.hibernate.Query;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import Util.HibernateUtil;

import com.opensymphony.xwork2.ActionSupport;

public class ajaxTest1 extends ActionSupport {

    /**

     * 判断姓名是否存在

     */

    private static final long serialVersionUID = 1L;

    private InputStream inputStream;

    private String name;

    private String location;

    @SuppressWarnings("unchecked")

    public String ajaxTest() throws UnsupportedEncodingException{

        if(name.equals("")){

            inputStream=new ByteArrayInputStream("姓名不可以是空值哦。".getBytes("utf-8"));

            System.out.println("AJAX invoing-------------name="+name);

        }else{

            //inputStream=new ByteArrayInputStream("姓名可以使用".getBytes("utf-8"));

            SessionFactory sessionFactory= HibernateUtil.getSessionFactory();

            Session session=sessionFactory.getCurrentSession();

            Transaction tr= session.beginTransaction();

            String hql="from domain.user where name='"+name+"' ";

            Query query=session.createQuery(hql);

            List<domain.user> list=query.list();

            //System.out.println(list.get(0).getName());

            if(!list.isEmpty()){

                inputStream=new ByteArrayInputStream("姓名已存在。".getBytes("utf-8"));

            }else{

                inputStream=new ByteArrayInputStream("姓名可以使用。".getBytes("utf-8"));

            }

            session.clear();

            session.flush();

            tr.commit();

        }

        return SUCCESS;

    }

    public InputStream getInputStream() {

        return inputStream;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getLocation() {

        return location;

    }

    public void setLocation(String location) {

        this.location = location;

    }

    public static long getSerialversionuid() {

        return serialVersionUID;

    }

}

jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<%

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>ajaxTest1</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">

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

<script type="text/javascript" src="../js/jquery.js"></script>

<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

<script type="text/javascript">

    $(function(){

    alert();

    $("#examine").focusout(function(){

        test();

    });

});

function test(){

    $.ajax({

            type: "POST",

            url: "ajax/ajaxTest1.action",

             data: "name="+$("#examine").val(),

             success: function(msg){

                 alert( "Data Saved: " + msg );

            }

        });

        }

</script>

  </head>

  <body>

  <form action="" method="post"  enctype="multipart/form-data"></form>

  <table>

      <tr>

          <td>姓名：</td>

          <td></td>

          <td>密码：</td>

      </tr>

      <tr>

          <td> <input name="username" type="text" maxlength="40" id="examine"></td>

          <td></td>

          <td> <input name="password" type="password" maxlength="40" ></td>

      </tr>

  </table>

  </body>

</html>

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