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  • 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

    创建el1.jsp,el2.jsp

    el1.jsp

    <%@ 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

    <%@ 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

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  • 原文地址:https://www.cnblogs.com/linlf03/p/7710422.html
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