Hey guys in this article, you will learn about the JSP Declaration Tag with easy to understand examples
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Overview
- JSP Expressions allows us to include Java code inside the JSP file.
- JSP will process the Java code on the server and return the HTML content
- JSP Declaration allows us to declare a method and call those methods from the same JSP page
| Element | Syntax |
| JSP Expression | <%= //Java code %> |
| JSP Scriptlet | <% //Java code %> |
| JSP Declaration | <%! //Java code %> |
Complete Example
Follow the below steps to understand the complete example
Create a Project
You can check the following post to create a new Dynamic We Project
Create a JSP file
Create JSPDeclaration.jsp file under WebContent and add the following content
<%@page import="java.util.Date"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%!
boolean isEven(int number) {
if(number % 2 == 0) {
return true;
}else {
return false;
}
}
%>
<p>The number 6 is: <%= isEven(6) ? "Even" : "Odd" %></p>
</body>
</html>
Run the file
Right click on the File, choose Run As, choose Run on Server. It will open in a default web browser, you will see the following content
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