Familiarisez-vous avec les avantages des différentes versions des mises à niveau de Tomcat

@WebServlet(name = "HelloServlet", urlPatterns = {"/hello"})
public class HelloServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.getWriter().println("Hello, World!");
    }
}

@WebServlet(name = "AsyncServlet", urlPatterns = {"/async"}, asyncSupported = true)
public class AsyncServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        AsyncContext asyncContext = request.startAsync();
        asyncContext.start(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(5000); // 模拟耗时操作
                    HttpServletResponse asyncResponse = (HttpServletResponse) asyncContext.getResponse();
                    asyncResponse.getWriter().println("Async Task Completed");
                    asyncContext.complete();
                } catch (Exception e) {
                    // 异常处理
                }
            }
        });
    }
}

@ServerEndpoint("/websocket")
public class WebSocketServer {
    @OnOpen
    public void onOpen(Session session) {
        // 连接建立时的处理逻辑
    }

    @OnMessage
    public void onMessage(String message, Session session) {
        // 接收到消息时的处理逻辑
    }

    @OnClose
    public void onClose(Session session, CloseReason closeReason) {
        // 连接关闭时的处理逻辑
    }
}