一、自定義原生Servlet

1、啟動類裡面增加註解 @ServletComponentScan

2、Servlet上添加註解  @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、自定義原生Listener

常用的監聽器 servletContextListener、httpSessionListener、servletRequestListener

servletContextListener：服務啟動，一般用於初始化載入

servletRequestListener：訪問啟動，一般用於統計

 1 @WebListener
 2 public class CustomContextListner implements
 
 ServletContextListener{
 3 
 4     @Override
 5     public void contextInitialized(ServletContextEvent sce) {
 6         System.out.println("======contextInitialized========");
 7         //啟動時觸發
 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 }