Hey guys in this article, you will learn about the JSP Scriptlet Syntax 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 Scriptlet allows us to insert 1 to many lines of java code
| Element | Syntax |
| JSP Expression | <%= //Java code %> |
| JSP Scriptlet | <% //Java code %> |
| JSP Declaration | <%! //Java code %> |
Examples
Following are some of the examples for JSP scriptlets
<%
out.println("2 + 3 = "+(2 + 3));
out.println("<br/>3 - 2 = "+(3 - 2));
out.println("<br/>2 * 3 = "+(2 * 3));
out.println("<br/>5 / 2 = "+(5 / 2));
%>
It produces the following output
2 + 3 = 5
3 - 2 = 1
2 * 3 = 6
5 / 2 = 2
We can include loops inside the scriptlets, consider the following example
<%
out.println("<br/>Even numbers are:");
for(int i = 0; i < 10; i++) {
if(i % 2 == 0) {
out.println("<br/>"+i);
}
}
%>
It produces the following output
Even numbers are:
0
2
4
6
8
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 JSPScriptlets.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>
<%
out.println("<br/>Even numbers are:");
for(int i = 0; i < 10; i++) {
if(i % 2 == 0) {
out.println("<br/>"+i);
}
}
%>
</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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