The Scriptlet Tag in JSP is used to embed Java code directly into a JSP page. The code written inside the <% %> tag is executed on the server whenever a request is made, helping generate dynamic content. It is one of the basic scripting elements provided by JSP.
- Allows writing control statements like loops and conditions (if, for, while)
- Can access request parameters and session data
- Used for processing logic, not just displaying output
Syntax:
<%
// Java code here
%>
Example:
<html>
<body>
<%
int num = 10;
out.println("Value of num is: " + num);
%>
</body>
</html>
Output:
Value of num is: 10
Implementation of JSP Scriptlet Tag
Step 1. Create a New Dynamic Web Project
- Go to: File ->New ->Dynamic Web Project
- Project Name: Geeks
- Target Runtime: Select Apache Tomcat v9.0 (or any installed version)
- Dynamic Web Module Version: 3.1
- Click Finish
Step 2: Create index.html file
Right-click on WebContent -> New -> Html File
- File name: index.html.
<!--index.html -->
<!-- Example of JSP code which prints the Username -->
<html>
<body>
<form action="Geeks.jsp">
<!-- move the control to Geeks.jsp when Submit button is click -->
Enter Username:
<input type="text" name="username">
<input type="submit" value="Submit"><br/>
</form>
</body>
</html>
Step 3: Create Geeks.jsp file
Right-click on WebContent -> New -> JSP File
- File name: Geeks.jsp
<%@ page language="java" 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>Insert title here</title>
</head>
<body>
<%
String name=request.getParameter("username");
out.print("Hello "+name);
%>
</body>
</html>
Run Project in Eclipse with Apache Tomcat
Right-click project ->Run As ->Run on Server (select Apache Tomcat). And access in Browser using given url.
http://localhost:8080/Geeks/
click submit:
