SpringBoot(10) Servlet3.0的注解：自定义原生Servlet、自定义原生Listener

一、自定义原生Servlet

1、启动类里面增加注解 @ServletComponentScan

2、Servlet上添加注解  @WebServlet(name = "userServlet",urlPatterns = "/v1/api/test/customs")

 1 @WebServlet(name = "userServlet",urlPatterns = "/v1/api/test/customs")
 2 public class UserServlet extends HttpServlet{
 3 
 4      @Override
 5      public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 6          
 7          resp.getWriter().print("custom sevlet");
 8          resp.getWriter().flush();
 9          resp.getWriter().close();
10      }
11 
12     @Override
13     protected void doPost(HttpServletRequest req, HttpServletResponse resp)
14             throws ServletException, IOException {
15         this.doGet(req, resp);
16     }
17     
18 }

 

二、自定义原生Listener

常用的监听器 servletContextListener、httpSessionListener、servletRequestListener

servletContextListener：服务启动，一般用于初始化加载

servletRequestListener：访问启动，一般用于统计

 1 @WebListener
 2 public class CustomContextListner implements ServletContextListener{
 3 
 4     @Override
 5     public void contextInitialized(ServletContextEvent sce) {
 6         System.out.println("======contextInitialized========");
 7         //启动时触发
 8     }
 9 
10     @Override
11     public void contextDestroyed(ServletContextEvent sce) {
12         System.out.println("======contextDestroyed========");
13         
14     }
15 
16 }
 1 @WebListener
 2 public class RequestListener implements ServletRequestListener {
 3 
 4     @Override
 5     public void requestDestroyed(ServletRequestEvent sre) {
 6         // TODO Auto-generated method stub
 7         System.out.println("======requestDestroyed========");
 8     }
 9 
10     @Override
11     public void requestInitialized(ServletRequestEvent sre) {
12         System.out.println("======requestInitialized========");
13         
14     }
15 
16 }

 

posted @ 2018-10-18 15:05  platycoden  阅读(650)  评论(0)  编辑  收藏  举报