Hey guys in this article, you will learn about the JSP Expression Language Syntax with easy to understand examples
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Table of Contents
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
| Element | Syntax |
| JSP Expression | <%= //Java code %> |
| JSP Scriptlet | <% //Java code %> |
| JSP Declaration | <%! //Java code %> |
Examples
Following are some of the examples for Java expression
<p>Current date and time is <%= new Date(System.currentTimeMillis()) %> </p>
This will display the following HTML content
Current date and time is Fri Oct 08 13:47:29 IST 2021
We can even compare the 2 values.
<p>Is 5 greater than to 10? <%= 5 > 10 %> </p>
This will display the following HTML content
Is 5 greater than to 10? false
We can even write the mathematical expressions
<p>The sum of 2 number is <%= 5 + 5 %> </p>
This will display the following content
The sum of 2 number is 10
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 JSPExpressions.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>
<p>Current date and time is <%= new Date(System.currentTimeMillis()) %> </p>
<p>Is 5 greater than to 10? <%= 5 > 10 %> </p>
<p>The sum of 2 number is <%= 5 + 5 %> </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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