el表达式-白红宇

el表达式

阅读量：6608 次

发布时间：2019-06-24

本文共 1324 字，大约阅读时间需要 4 分钟。

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><%@ page import="com.lzp.domain.*" %><%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>      My JSP 'el.jsp' starting page        
         
         
             
         
         
               
         <%    request.setAttribute("username", "requestusername");    session.setAttribute("username", "sessionusername");    pageContext.setAttribute("username", "pageContextusername");    application.setAttribute("username", "applicationusername");     %>     
          ${username }     
               ${pageScope.username}
     ${applicationScope.username }
     ${sessionScope.username}
     ${requestScope.username}
          javaBean与el相结合的使用
     <%     Person p =new Person();     p.setAge(22);     p.setName("王小明");     request.setAttribute("p", p);           %>     ${p.age }${p.name }          其他对象
     ${param.XXX }     ${paramValues.YYY[0] }     ${paramValues.YYY[1] }          ${cookie.JSESSIONID.value}=${cookie.JSESSIONID.name}          ${pageContext.request.contextPath }               ${fn:length(paramValues)}     ${fn:toLowerCase(param.XXX)}