JSP Database Connection JSP Standard Tag Library (JSTL)

<c:if> tag

<c:if> tag evaluates an expression, and if the value of the expression is true, it executes its body content.

Syntax Format

<c:if test="<boolean>" var="<string>" scope="<string>">
　　　...
</c:if>

Attribute

The <c:if> tag has the following attributes:

Attribute	Description	Is it necessary	Default Value
test	Condition	Yes	None
var	Used to store the variable for conditional results	No	None
scope	The scope of var attribute	No	page

Demonstration Example

<%@ page language="java" contentType="text/html; charset=UTF-8"
　　　　pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>c:if Tag Example</title>
</head>
<body>
<c:set var="salary" scope="session" value="${2000*2">/>
<c:if test="${salary}　2000}>
　　　<p>My salary is: <c:out value="${salary}"/><p>
</c:if>
</body>
</html>

The running result is as follows:

My salary is:　4000

JSP Standard Tag Library

JSP Database Connection JSP Standard Tag Library (JSTL)

Basic Tutorial on JSP

Advanced Tutorial on JSP

<c:if> tag

Syntax Format

Attribute

Demonstration Example