ajax+json+Struts2实现list传递（转载）

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一、首先需要下载JSON依赖的jar包。它主要是依赖如下：

json-lib-2.2.2-jdk15

ezmorph-1.0.4 commons-logging-1.0.4 commons-lang-2.4 commons-collections-3.2.1

commons-beanutils

二、实例。

1、身份证错误信息Bean类(ErrorCondition.java)

/** *@Project: excel *@Author: chenssy *@Date: 2013-4-4 *@Copyright: chenssy All rights reserved. */  
public class ErrorCondition {  private String name; // 姓名  private String idCard; // 身份证  private String status; // 错误状态  private String message; // 错误信息  ErrorCondition(String name,String idCard,String status,String message){  this.name = name;  this.idCard = idCard;  this.status = status;  this.message = message;  }  public String getName() {  return name;  }  public void setName(String name) {  this.name = name;  }  public String getIdCard() {  return idCard;  }  public void setIdCard(String idCard) {  this.idCard = idCard;  }  public String getStatus() {  return status;  }  public void setStatus(String status) {  this.status = status;  }  public String getMessage() {  return message;  }  public void setMessage(String message) {  this.message = message;  }  }

2、JSP页面(index.jsp)

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  
<html>  <head>    <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.7.2.js"></script>  </head>  <body>  <input type="button" value="点我显示数据" id="clickMe">  <table id="showTable" border="1">  <tr>  <td>姓名</td>  <td>身份证</td>  <td>错误状态</td>  <td>错误信息</td>  </tr>  </table>  <script>  $("#clickMe").click(function(){  var url = "json/jsonTest.action";  $.ajax({  type:'get',  url:url,  dataType: 'json',  success:function(data){  $.each(data,function(i,list){  var _tr = $("<tr><td>"+list.name+"</td><td>"+  list.idCard+"</td><td>"+list.status+  "</td><td>"+list.message+"</td></tr>");  $("#showTable").append(_tr);  })  }  })  })  </script>  </body>  
</html>

3、Action处理类(JsonTest_01.java)

/** *@Project: jsonTest *@Author: chenssy *@Date: 2013-4-5 *@Copyright:  chenssy All rights reserved. */  
public class JsonTest_01 {  public String execute() throws IOException{  ErrorCondition r1 = new ErrorCondition("张三", "4306821989021611", "L", "长度错误");  ErrorCondition r2 = new ErrorCondition("李四", "430682198902191112","X", "校验错误");  ErrorCondition r3 = new ErrorCondition("王五", "", "N", "身份证信息为空");  List<ErrorCondition> list = new ArrayList<ErrorCondition>();  list.add(r1);  list.add(r2);  list.add(r3);  //将list转化成JSON对象  JSONArray jsonArray = JSONArray.fromObject(list);  HttpServletResponse response = (HttpServletResponse) ActionContext.getContext().get(ServletActionContext.HTTP_RESPONSE);  response.setCharacterEncoding("UTF-8");   response.getWriter().print(jsonArray);  return null;  }  
}

4、struts.xml配置

<?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">  <!-- 指定struts 2的配置文件的跟元素  -->  
<struts>  <package name="json" namespace="/json" extends="struts-default">  <action name="jsonTest" class="com.json.action.JsonTest_01" method="execute"></action>  </package>  
</struts>

三、运行结果

开始页面如下：