JSP, or JavaServer Pages, is a technology used in web development to create dynamic web pages. It’s a server-side scripting language that allows developers to embed Java code within HTML pages. JSP is often used in conjunction with Java Servlets to build web applications.
Here are some key features and concepts related to JSP:
- Server-Side Technology: JSP is a server-side technology, meaning that the Java code embedded in JSP pages is executed on the web server, and the resulting HTML is sent to the client’s web browser. This allows for the generation of dynamic content on the server before it’s sent to the client.
- Integration with HTML: JSP pages are primarily HTML pages with embedded Java code. You can use standard HTML tags for creating the structure and layout of your web pages and use JSP tags to insert dynamic content or execute Java code.\
- JSP Tags: JSP provides a set of custom tags that enable you to interact with Java objects, perform database operations, control flow, and more. These tags are often referred to as JSTL (JSP Standard Tag Library) and allow for cleaner and more modular code.
- Scriptlet Code: In addition to JSP tags, you can embed Java code directly into JSP pages using scriptlet code enclosed within <% %> tags. This code is executed when the page is processed on the server.
- Expression Language (EL): JSP supports Expression Language, which provides a simplified way to access and manipulate data within JSP pages. EL expressions are enclosed within ${ } and are often used to display dynamic data.
- MVC Architecture: JSP is commonly used in the Model-View-Controller (MVC) architectural pattern. Java Servlets typically handle the controller part, while JSP handles the view part, allowing for a separation of concerns in web application development.
- Java Integration: Since JSP allows you to embed Java code, you can leverage the power of the Java language and its vast ecosystem of libraries and frameworks to build feature-rich web applications.
- Precompilation: JSP pages can be precompiled into servlets, improving performance by reducing the runtime overhead associated with parsing and compiling JSP pages on each request.
