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应付学习需要,需要通过ajax来获取后台的List集合里面的值,特做了一个实例并附上演示效果,希望本例对你有所帮助
由于实习需要,需要通过ajax来获取后台的List集合里面的值。由于前面没有接触过,所以今天就来研究下了。 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) 复制代码 代码如下: /** *@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) 复制代码 代码如下: <%@ 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) 复制代码 代码如下: /** *@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 复制代码 代码如下: <?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:
当点击按钮后
返回的结果如下:
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