Servlet life cycle

The servlet runs in the Web container, and the creation and destruction of its instances are not determined by the programmer, but are controlled by the container. Each servlet follows the following life cycle:

1, the Web container to create a servlet instance;

2. The Web container invokes the servlet's init () method to initialize the servlet;

3, after the servlet initialization, exists in the container, in response to user requests;

4. When the Web container decides to destroy the servlet, the servlet's Destroy () method is called first, and the servlet is typically destroyed when the Web app is closed.

　　

Servlet life cycle