Detailed Explanation of the Use of Expressions in JSP
- 2021-12-11 18:39:47
- OfStack
The JSP expression is used to output information to the page, and its syntax format is as follows:
<%= 表达式 %>
Parameter description:
Expression: It can be a complete expression of any Java speech. The final result of the expression will be converted to a string.
Here are one simple example to demonstrate:
<%@ 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> Test JSP Use of expressions </title>
</head>
<body>
<!-- Output variable -->
<%
String manager = " Xiao Li ";
%>
Administrator: <%=manager%>
<%=" Administrator: " + manager%>
<!-- Output expression evaluation results -->
<%=1 + 2%>
<!-- Execute Java Code -->
<%
int x = 10;
out.println(x);
%>
<!-- Inserts an expression into the HTML Mark in -->
<%
String url = "test.png";
%>
<img src="images/<%=url%>" />
<br>
<!-- Output system time -->
<%=new Date()%>
<!-- Execute multiple fragments -->
<%
for (int i = 0; i < 5; i++) {
%>
<H2>http://blog.csdn.net/u010142437</H2>
<%
}
%>
</body>
</html>