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Category: java

Introduction to jsp and jsp life cycle

Published on 30 Sep 2026

Explanation

JSP, or JavaServer Pages, is a server-side technology used to create dynamic web pages using HTML with Java-based server-side features.

Code:

<html>
<body>
    <h1>Welcome to JSP</h1>
</body>
</html>

Explanation

A JSP page is translated into a servlet by the JSP container before it is executed.

Code:

JSP Page
   ↓
Translation
   ↓
Servlet Source
   ↓
Compilation
   ↓
Servlet Class
   ↓
Execution

Explanation

The JSP lifecycle includes translation, compilation, initialization, request processing, and destruction.

Code:

JSP
 ↓
Translation
 ↓
Compilation
 ↓
_jspInit()
 ↓
_jspService()
 ↓
_jspDestroy()

Explanation

The _jspService() method is generated by the JSP container and handles requests to the JSP page.

Code:

Browser
   |
   v
JSP
   |
   v
_jspService(request, response)
   |
   v
HTML Response

Explanation

JSP is commonly used as the View layer in traditional Java MVC applications.

Code:

Browser
   ↓
Servlet Controller
   ↓
Service / Model
   ↓
Servlet
   ↓
JSP View
   ↓
Browser

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