JSP Life Cycle in Java

A JSP page services requests as a servlet. A JSP page life cycle is defined as a process from its translation phase to the destruction phase. Thus, the life cycle of JSP pages is determined by Java Servlet technology.

JSP Life Cycle:

1. Translation: A Java servlet file is generated from a JSP source file. In the translation phase, the container validates the syntactic correctness of the JSP page and tag files.

2. Compilation: The generated java servlet file is compiled into a java servlet class.

3. Classloading: Servlet class that has been loaded from the JSP source is now loaded into the container.

4. Instantiation: In this step, the object and the instance of the class are generated.

5. Initialization: jspinit() method will initiate the servlet instance which was generated from JSP.

6. Execution: This Execution phase is responsible for all JSP interactions and logic executions for all requests until the JSP gets destroyed. As the requested JSP page is loaded and initiated, the JSP engine has to invoke the jspService() method.

7. Destruction: jspdestroy() method is also invoked by the container. This method is called when the container decides it no longer needs the servlet instance to service requests. It is the end of the life cycle.