用jstl和el表达式获取List<Map<String,Object>>中的值

来源：互联网发布：河南安全教育网络平台编辑：程序博客网时间：2024/06/06 10:59

使用jstl时要引入这么一句话

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<%@ page language="java" pageEncoding="UTF-8" import="java.util.*" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html:html lang="true">   <head>     <html:base />         <title>MyJsp.jsp</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">     -->  </head><!-- 测试用数据，一般通过request.attribute跳转过来--> <%      List<Map<String,Object>> students = new ArrayList<Map<String,Object>>();         Map<String,Object> s1 = new HashMap<String,Object>();         s1.put("name","jim");         s1.put("age","15");         students.add(s1);            Map<String,Object> s2 = new HashMap<String,Object>();         s2.put("name","lucy");         s2.put("age","12");         students.add(s2);                request.setAttribute("students",students);  %>    <body>     <table>        <tr>         <td>姓名         </td>         <td>年龄         </td>        </tr>        <!--  loop begin -->        <c:forEach var="student" items="${students}" >           <tr>           <td> <c:out value="${student.name}" default="wang"/>           </td>                          <td>            <c:out value="${student.age}" default="wang"/>           </td>           </tr>        </c:forEach>        <!-- loop end  -->     </table>   </body> </html:html>

在foreach中也可以这么写

<td><c:out value="${student.get('name')}" default="wang" /></td><td>${student.name }</td>

都是可以的

运行结果如下：

姓名年龄

jim 15

lucy 12

阅读全文

0 0