LifeServlet.java ~~~ package zyw.servlet; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet(name = "LifeServlet1",urlPatterns = "/life") public class LifeServlet extends HttpServlet { @Override public void init() throws ServletException { System.out.println("init 被执行了"); super.init(); } @Override public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException { System.out.println("service被执行了"); super.service(req, res); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("doget被执行了"); } @Override public void destroy() { System.out.println("destory被执行了"); super.destroy(); } } ~~~ 启动时  关闭项目