表达式语言

来源：互联网发布：硬质合金的重量算法编辑：程序博客网时间：2024/05/20 18:41

访问集合操作

package cn.mldn.lxh.servlet.el ;

import java.io.* ;

import java.util.* ;

import javax.servlet.* ;

import javax.servlet.http.* ;

public class ELServletDemo04 extends HttpServlet

{

public void doGet(HttpServletRequest req,HttpServletResponse resp) throws IOException,ServletException

{

List l = new ArrayList() ;

Simple s = null ;

s = new Simple() ;

s.setName("LiXingHua") ;

l.add(s) ;

s = new Simple() ;

s.setName("MLDN") ;

l.add(s) ;

s = new Simple() ;

s.setName("mole") ;

l.add(s) ;

req.setAttribute("all",l) ;

// 服务器端跳转

req.getRequestDispatcher("eldemo06.jsp").forward(req,resp) ;

}

public void doPost(HttpServletRequest req,HttpServletResponse resp) throws IOException,ServletException

{

this.doGet(req,resp) ;

}

};

<servlet-name>el02</servlet-name>

<servlet-class>cn.mldn.lxh.servlet.el.ELServletDemo02</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>el02</servlet-name>

<url-pattern>/eldemo/el_2</url-pattern>

</servlet-mapping>

//使用Iternate输出

<%@page import="java.util.*"%>

<%--

要使用Iterator进行输出

--%>

// List要使用Iterator输出

List l = (List)request.getAttribute("all") ;

Iterator iter = l.iterator() ;

while(iter.hasNext())

{

// 将取出的对象放在page范围之中

pageContext.setAttribute("sim",iter.next()) ;

<h1>${pageScope.sim.name}</h1>

}