What is the difference between JSP (JavaServer Pages) and Servlets in a J2EE application, and when would you choose to use one over the other?

```html

Difference between JSP and Servlets in a J2EE application

In a J2EE application, JSP (JavaServer Pages) and Servlets are both used for creating dynamic web pages and handling client requests. The main difference between JSP and Servlets is in their primary focus and usage.

Servlets:

• Serve as Java components that handle the processing of client requests.
• Directly extend the javax.servlet.Servlet interface.
• Provide greater control over the request processing and response generation.

JSP (JavaServer Pages):

• Are essentially HTML templates with embedded Java code for dynamic content generation.
• Are compiled into Servlets before execution.
• Provide a simpler way to create dynamic web pages by separating Java code from HTML.

Choosing between JSP and Servlets:

When deciding whether to use JSP or Servlets in a J2EE application, the choice often depends on the specific requirements of the application and the developer's preferences. Generally:

• Use JSP when:
• Emphasis is on presentation with minimal Java logic.
• Need to create dynamic web pages using HTML templates.
• Use Servlets when:
• Require more control over request processing and response generation.
• Need to implement complex business logic or handle low-level processing.

By understanding the differences and purposes of JSP and Servlets, developers can make informed decisions on when to choose one over the other in a J2EE application.

```