获取域中存储List集合、Map集合的值

获取域中存储List集合和Map集合的值

list集合:${域名称.键名[索引]}

jsp代码

<%@ page import="java.util.ArrayList" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>获取域中存储List集合的值</title>
</head>
<body>
    <%
        ArrayList list = new ArrayList();
        list.add("aaa");
        list.add("bbb");

        request.setAttribute("list",list);
    %>
<h3>获取List集合的值</h3>
${list}<br>
${list[0]}<br>
${list[1]}<br>

</body>
</html>

运行结果

 

 map集合:

${域名称.键名.key名称}

${域名称.键名[key名称]}

jsp代码

<%@ page import="java.util.ArrayList" %>
<%@ page import="java.util.Map" %>
<%@ page import="java.util.HashMap" %>
<%@ page import="com.bai.dao.User" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>获取域中存储map集合的值</title>
</head>
<body>
    <%
        Map map=new HashMap();
        map.put("sname","李四");
        map.put("gender","男");
        request.setAttribute("map",map);
    %>
<h3>获取map集合的值</h3>
${map.gender}<br>
${map["gender"]}<br>

</body>
</html>

运行结果

posted @ 2022-08-16 17:29  baimingze  阅读(49)  评论(0)    收藏  举报