ServletRequestListener接口
MyServletRequestListener
public class MyServletRequestListener implements ServletRequestListener { public void requestDestroyed(ServletRequestEvent sre) { HttpServletRequest request = (HttpServletRequest)sre.getServletRequest(); System.out.println("请求对象"+request.getRequestURI() + "被销毁了"); }
public void requestInitialized(ServletRequestEvent sre) { HttpServletRequest request = (HttpServletRequest)sre.getServletRequest(); System.out.println("请求对象"+request.getRequestURI() + "被创建了"); } } |
ServletRequestListener的实际用途:统计网站的请求数量,可以计算网站性能(实际应用不多)
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实现的接口:ServletRequestListener,HttpSessionListener,ServletContextListener 工程的大致步骤: 1.自定义实现三个监听器的类 2.使用注解的方法注册监听器 3.部署工程并运行,在控制台会输出相应的信息