JSP中的EL (Express Language表达式语言)

EL语言的目的:

用于无java代码的JSP页面

JSP中的EL (Express Language表达式语言)

 

创建el1.jsp,el2.jsp

el1.jsp

 

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<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
  <form action="el2.jsp">
    username: <input type="text" name="username">
    <input type="submit" value="submit">
  </form>
  <% session.setAttribute("hello", "world"); %>
</body>
</html>

  

el2.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%= request.getParameter("username") %><br>
el表达式:  ${param.username}
 
<br>
<%= session.getAttribute("hello") %><br>
el表达式: ${sessionScope.hello}
</body>
</html>

  

效果图

JSP中的EL (Express Language表达式语言)



本文转自Work Hard Work Smart博客园博客,原文链接:http://www.cnblogs.com/linlf03/p/7710422.html,如需转载请自行联系原作者
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