✅ 1. Simplifies Web Development
Instead of writing HTML inside Java (as in Servlets), you can write HTML first and just insert Java logic where needed. This makes your code:
- Easier to write
- Easier to read
- Easier to maintain
✅ 2. Separates Business Logic from Presentation
- JSP handles presentation (UI/HTML)
- Java classes or servlets handle business logic This separation follows the MVC pattern (Model–View–Controller), making your code more modular and testable.
✅ 3. Reusable Components
You can use:
- JavaBeans for reusable data components
- JSP tag libraries (like JSTL) to reduce Java code in JSP
- Includes (
<jsp:include>) to reuse common page parts like headers and footers
✅ 4. Built-in Session and Request Handling
JSP provides built-in access to:
request,responsesession,applicationout(for writing to the response) You don’t need to manually write boilerplate code to access these.
✅ 5. Automatic Servlet Generation
Behind the scenes, each JSP is compiled into a servlet. This gives you the power and performance of Java servlets, but with much less manual coding.
✅ 6. Integration with Enterprise Tools
JSPs integrate well with:
- JDBC for database access
- Java EE technologies (e.g., Servlets, EJBs)
- Spring MVC and other frameworks
Summary:
We need JSP because it bridges the gap between HTML page design and Java server-side logic. It allows for rapid, dynamic content generation with less code and better organization than using servlets alone.