java无法使用SpringWebSocket将客户端连接到服务器
我已经用java编写了一个Blackjack服务器,它可以正常启动,但是我在编写一个单独的java客户端来连接到我的服务器时遇到了问题。我遵循了SpringWebSocket文档和示例,它看起来像是我的客户机连接没有任何错误,我希望它能够命中afterConnected()
方法,但它没有达到这一点。客户端运行并完成,没有错误。知道我做错了什么吗
WebSocketConfig。服务器端的java:
package com.lactaoen.blackjack.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.enableSimpleBroker("/topic", "/queue");
registry.setApplicationDestinationPrefixes("/app");
registry.setUserDestinationPrefix("/user");
}
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/connect").withSockJS();
}
}
客户端:
package com.lactaoen.blackjack.client;
import org.springframework.messaging.converter.StringMessageConverter;
import org.springframework.messaging.simp.stomp.*;
import org.springframework.web.socket.client.standard.StandardWebSocketClient;
import org.springframework.web.socket.messaging.WebSocketStompClient;
import org.springframework.web.socket.sockjs.client.RestTemplateXhrTransport;
import org.springframework.web.socket.sockjs.client.SockJsClient;
import org.springframework.web.socket.sockjs.client.Transport;
import org.springframework.web.socket.sockjs.client.WebSocketTransport;
import java.util.ArrayList;
import java.util.List;
public class BlackjackClient {
public static void main(String[] args) {
List<Transport> transports = new ArrayList<>();
transports.add(new WebSocketTransport(new StandardWebSocketClient()));
transports.add(new RestTemplateXhrTransport());
SockJsClient sockJsClient = new SockJsClient(transports);
String stompUrl = "ws://localhost:8080/connect";
WebSocketStompClient stompClient = new WebSocketStompClient(sockJsClient);
stompClient.setMessageConverter(new StringMessageConverter());
stompClient.connect(stompUrl, new BlackjackSessionHandler());
}
private static class BlackjackSessionHandler extends StompSessionHandlerAdapter {
@Override
public void afterConnected(StompSession session, StompHeaders connectedHeaders) {
// I'd expect it to print this out, but it doesn't get here
System.out.println("Hello, world!");
}
}
}
# 1 楼答案
客户端的主要方法是在连接之前完成
在主方法的最后一行放一个
Thread.sleep(60000)
,它应该可以工作# 2 楼答案
客户端将在通信完成(发送或接收)后关闭连接,您应该阻止线程以确保应用程序不会关闭
在主方法末尾添加以下内容: