日期:2014-05-16 浏览次数:20388 次
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'JSTL_test.jsp' starting page</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> <body> <h1>测试EL表达式</h1> <hr> <li>普通字符串</li> hello(jsp脚本):<%request.getAttribute("hello");%><br> hello(EL表达式使用$和{}):${hello}<br> hello(el表达式,el的隐含对象:pageScope,requestScope,sessionScope,applicationScope<br>如果没有指定scope,则它的搜索顺序为 pageScope ----> applicationScope):${requestScope.hello }<br> <li>结构</li> 姓名:${user.userName}(与对象的方法(get)相关)<br> 年龄:${user.age }<br> 所属组:${user.group.name }<br> <li>输出map</li> mapvalue.key1:${mapvalue.key1 }<br> mapvalue.key2:${mapvalue.key2 }<br> <li>数组输出,采用[]和下标</li> atrarray[2]:${astarray[1] }<br> <li>输出对象数组</li> userarray[3].username:${users[2].username }<br> <li>输出list,采用[]和下标</li> userlist[5].username:${userlist[4].username }<br> <li>el表达式对运算符的支持</li> 1 + 2 = ${1+2 }<br> 10 / 5 = ${10/5 }<br> 10 / 5 = ${10 div 5 }<br> 10 % 3 = ${10%3 }<br> 10 % 3 = ${10 mod 3 }<br> <-- == eq != ne < lt > gt <= le >= ge && and || or ! not / div % mod --> <li>测试empty</li> value1:${not empty value1 }<br> value2:${empty value1 }<br> value3:${empty value1 }<br> value4:${empty value1 }<br> </body> </html>
?