JSP Architecture

JSP (Java Server Pages) uses a three-tier architecture with a client, web server, and database. When the client sends a request, the web server's JSP engine processes the JSP file by converting it into a servlet, compiling, and executing it. The generated HTML is sent back to the client. The following diagram shows the architecture of JSP.

Architecture of JSP:

JSP (JavaServer Pages): It is a server-side technology used to create dynamic, platform-independent web applications. It allows embedding Java code directly into HTML or XML using JSP tags. When a client sends a request, the JSP file is first converted into a servlet by the JSP container, then compiled and executed.

Below diagram explanation step-by-step working of JSP.

Working of a JSP file

1. When a user accesses a webpage with a .jsp extension, the browser sends an HTTP request to the web server for that JSP file.
2. The web server checks if a compiled version of the JSP already exists. If it does, it uses that. If not, the request is passed to the JSP engine for processing.
3. The JSP engine reads the JSP file and translates it into a Java Servlet by converting the HTML and JSP code into equivalent Java code.
4. This Java Servlet is then compiled into a .class file (bytecode) that the server can execute.
5. The servlet runs on the server, generates dynamic content (usually HTML), and prepares it as a response.
6. Finally, the web server sends this generated HTML back to the user’s browser, which displays the resulting webpage.