观察Servlet执行过程

package cn.com.yjw.servlet;

import javax.servlet.*;
import javax.servlet.annotation.WebServlet;
import java.io.IOException;
@WebServlet("/demo1")
public class MyServlet implements Servlet {
    @Override
    public void init(ServletConfig servletConfig) throws ServletException {
//init初始化
        System.out.println("初始化Servlet");
    }

    @Override
    public ServletConfig getServletConfig() {
        return null;
    }

    @Override
    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
//service正在执行
        System.out.println("执行Servlet");
}

    @Override
    public String getServletInfo() {
        return null;
    }

    @Override
    public void destroy() {
//destroy释放
        System.out.println("释放Servlet");
    }
}

 

 刷新页面几次后（刷新一次执行一次）init只执行一次（只初始化一次）

 

 初始化以后反复调用

结束tomcat运行以后