Annotation配置Servlet
@WebServlet(urlPatterns="/hello")
public class HelloServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
resp.getWriter().print("<h1>hello world!</h1>");
}
}
配置Filter
@WebFilter(urlPatterns="/*")
public class MyFilter implements Filter {
}
配置监听器
@WebListener
public class MyListener implements ServletContextListener {
}