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What does the syntax of expressions in jsp begin with?

(*-*)浩Original: 2019-05-20 15:48:453986browse

JSP expression is used to output information to the page. Its syntax format is as follows:

##<%= Expression%>, Starts with "<%=" and ends with "%>"

Parameter description:

Expression: It can be a complete expression of any Java voice. The final result of the expression will be converted to a string.

Here are some simple examples:

<%@ page language="java" import="java.util.*"
	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>测试JSP表达式的使用</title>
</head>
<body>
 
	<!-- 输出变量 -->
	<%
	    String manager = "小李";
	%>
	管理员：<%=manager%>
	<%="管理员：" + manager%>
 
	<!-- 输出表达式计算结果 -->
	<%=1 + 2%>
 
	<!-- 执行Java代码 -->
	<%
	    int x = 10;
	    out.println(x);
	%>
 
	<!--  将表达式插入到HTML标记中-->
	<%
	    String url = "test.png";
	%>
	<img src="images/<%=url%>" />
 
	<br>
	<!-- 输出系统时间 -->
	<%=new Date()%>
 
	<!-- 执行多个片断 -->
	<%
	    for (int i = 0; i < 5; i++) {
	%>
 
	<H2>http://blog.csdn.net/u010142437</H2>
 
	<%
	    }
	%>
 
 
</body>
</html>

Related learning recommendations:
java basic tutorial

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