jsp el

1，简单值
(1) List: 
<c:forEach var="student" items="${sessionScope.list}"  varStatus="status"> 
  <font size=5 color=blue>
    index:${status.index }<br>
    ID:${student.id }<br>
    Name:${student.name }<br>
    Country:${student.address.country }<br> 
    City:${student.address.city }<br> 
    Street:${student.address.street } <br>
  </font> 
</c:forEach>

(2) map
<c:forEach var="entry" items="${sessionScope.map}" begin="0" end="4" step="1" varStatus="status" > 
  <font size=5 color=red>
    index:${status.index }<br> 
    ID:${entry.key }<br> Name:${entry.value.name }<br> 
    Country:${entry.value.address.country }<br> 
    City:${entry.value.address.city }<br> 
    Street:${entry.value.address.street }<br> </font> 
</c:forEach>

(3) Array
< c:forEach var = "color" items = "${sessionScope.colors}" >
    ${color}< br >  
</c:forEach > 


2，取对象的对象。
UserInfo里面已经有了DataObject data了，然后request.setAttribute("userInfo",userInfo)，页面上就${userinfo.data.sex} 与${userinfo.data.age}

算了,直接写吧.
request.setAttribute("userinfo",userinfo);

然后页面
<c:set var="userinfo" value="${requestScope.userinfo}"/>
username:${userinfo.username}
password:${userinfo.password}
<c:set var="dataObject" value="${userinfo.dataObject}"/>
age:${dataObject.age}
sex:${dataObject.sex}

不知道这样对不,<bean>标签不怎么用,不熟悉,:)

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

<%@ page language=”java” pageEncoding=”GBK” %>

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