整合Servlet,Filter和Listener
阿新 • • 發佈:2020-08-05
Servlet
@WebServlet(urlPatterns = "/myservlet")
public class MyServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("MyServlet");
}
}
Filter
@WebFilter(urlPatterns = "/*") public class MyFilter implements Filter { @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { System.out.println("MyFilter"); filterChain.doFilter(servletRequest,servletResponse); } }
Listener
@WebListener public class MyRequestListener implements ServletRequestListener { @Override public void requestDestroyed(ServletRequestEvent sre) { System.out.println("requestDestroyed"); } @Override public void requestInitialized(ServletRequestEvent sre) { System.out.println("requestInitialized"); } }
加註解