java WebSocket客户端断线重连 java WebSocket客户端断线重连的实现方法

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.java-websocket</groupId>
            <artifactId>Java-WebSocket</artifactId>
            <version>1.5.1</version>
        </dependency>

package ai.guiji.csdn.ws.client;
 
import cn.hutool.core.thread.ThreadUtil;
import cn.hutool.core.util.StrUtil;
import lombok.extern.slf4j.Slf4j;
import org.java_websocket.WebSocket;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.framing.Framedata;
import org.java_websocket.handshake.ServerHandshake;
 
import javax.net.ssl.*;
import java.net.Socket;
import java.net.URI;
import java.nio.ByteBuffer;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Consumer;
 
/** @Author huyi @Date 2021/10/15 20:03 @Description: 重连websocket客户端 */
@Slf4j
public class ReConnectWebSocketClient {
  /** 字符串消息回调 */
  private Consumer<String> msgStr;
  /** 字节流消息回调 */
  private Consumer<ByteBuffer> msgByte;
  /** 异常回调 */
  private Consumer<Exception> error;
  /** 连接标识 */
  private String key;
  /** ws服务端连接 */
  private URI serverUri;
  /** 尝试重连标识 */
  private AtomicBoolean tryReconnect;
  /** 需要ping标识 */
  private AtomicBoolean needPing;
  /** websocket连接实体 */
  private WebSocketClient webSocketClient;
  /** 重连次数 */
  private AtomicInteger reConnectTimes;
  /** 连接结束标识 */
  private AtomicBoolean end;
  /** 连接后初始发送报文，这里也可以不需要，如果服务端主动断开连接，重连后可以继续推送报文的话。 */
  private String initReConnectReq;
  /** 结束回调 */
  private Consumer<String> endConsumer;
 
  public ReConnectWebSocketClient(
      URI serverUri,
      String key,
      Consumer<String> msgStr,
      Consumer<ByteBuffer> msgByte,
      Consumer<Exception> error) {
    this.msgStr = msgStr;
    this.msgByte = msgByte;
    this.error = error;
    this.key = key;
    this.serverUri = serverUri;
    this.tryReconnect = new AtomicBoolean(false);
    this.needPing = new AtomicBoolean(true);
    this.reConnectTimes = new AtomicInteger(0);
    this.end = new AtomicBoolean(false);
    this.endConsumer = this::close;
    init();
  }
 
  /** 初始化连接 */
  public void init() {
    // 创建连接
    createWebSocketClient();
    // ping线程
    circlePing();
  }
 
  private void needReconnect() throws Exception {
    ThreadUtil.sleep(10, TimeUnit.SECONDS);
    int cul = reConnectTimes.incrementAndGet();
    if (cul > 3) {
      close("real stop");
      throw new Exception("服务端断连，3次重连均失败");
    }
    log.warn("[{}]第[{}]次断开重连", key, cul);
    if (tryReconnect.get()) {
      log.error("[{}]第[{}]次断开重连结果 -> 连接正在重连，本次重连请求放弃", key, cul);
      needReconnect();
      return;
    }
    try {
      tryReconnect.set(true);
 
      if (webSocketClient.isOpen()) {
        log.warn("[{}]第[{}]次断开重连，关闭旧连接", key, cul);
        webSocketClient.closeConnection(2, "reconnect stop");
      }
      webSocketClient = null;
      createWebSocketClient();
      connect();
      if (StrUtil.hasBlank(initReConnectReq)) {
        send(initReConnectReq);
      }
    } catch (Exception exception) {
      log.error("[{}]第[{}]次断开重连结果 -> 连接正在重连，重连异常:[{}]", key, cul, exception.getMessage());
      needReconnect();
    } finally {
      tryReconnect.set(false);
    }
  }
 
  private void createWebSocketClient() {
    webSocketClient =
        new WebSocketClient(serverUri) {
          @Override
          public void onOpen(ServerHandshake serverHandshake) {
            log.info("[{}]ReConnectWebSocketClient [onOpen]连接成功{}", key, getRemoteSocketAddress());
            tryReconnect.set(false);
          }
 
          @Override
          public void onMessage(String text) {
            log.info("[{}]ReConnectWebSocketClient [onMessage]接收到服务端数据：text={}", key, text);
            msgStr.accept(text);
          }
 
          @Override
          public void onMessage(ByteBuffer bytes) {
            log.info("[{}]ReConnectWebSocketClient [onMessage]接收到服务端数据：bytes={}", key, bytes);
            msgByte.accept(bytes);
          }
 
          @Override
          public void onWebsocketPong(WebSocket conn, Framedata f) {
            log.info(
                "[{}]ReConnectWebSocketClient [onWebsocketPong]接收到服务端数据：opcode={}",
                key,
                f.getOpcode());
          }
 
          @Override
          public void onClose(int i, String s, boolean b) {
            log.info("[{}]ReConnectWebSocketClient [onClose]关闭，s={}，b={}", key, s, b);
            if (StrUtil.hasBlank(s) || s.contains("https")) {
              if (end.get()) {
                return;
              }
              try {
                needReconnect();
              } catch (Exception exception) {
                endConsumer.accept("reconnect error");
                error.accept(exception);
              }
            }
          }
 
          @Override
          public void onError(Exception e) {
            log.info("[{}]ReConnectWebSocketClient [onError]异常，e={}", key, e);
            endConsumer.accept("error close");
            error.accept(e);
          }
        };
    if (serverUri.toString().contains("wss://")) {
      trustAllHosts(webSocketClient);
    }
  }
 
  public void circlePing() {
    new Thread(
            () -> {
              while (needPing.get()) {
                if (webSocketClient.isOpen()) {
                  webSocketClient.sendPing();
                }
                ThreadUtil.sleep(5, TimeUnit.SECONDS);
              }
              log.warn("[{}]Ping循环关闭", key);
            })
        .start();
  }
 
  /**
   * 连接
   *
   * @throws Exception 异常
   */
  public void connect() throws Exception {
    webSocketClient.connectBlocking(10, TimeUnit.SECONDS);
  }
 
  /**
   * 发送
   *
   * @param msg 消息
   * @throws Exception 异常
   */
  public void send(String msg) throws Exception {
    this.initReConnectReq = msg;
    if (webSocketClient.isOpen()) {
      webSocketClient.send(msg);
    }
  }
 
  /**
   * 关闭
   *
   * @param msg 关闭消息
   */
  public void close(String msg) {
    needPing.set(false);
    end.set(true);
    if (webSocketClient != null) {
      webSocketClient.closeConnection(3, msg);
    }
  }
 
  /**
   * 忽略证书
   *
   * @param client
   */
  public void trustAllHosts(WebSocketClient client) {
    TrustManager[] trustAllCerts =
        new TrustManager[] {
          new X509ExtendedTrustManager() {
 
            @Override
            public void checkClientTrusted(
                X509Certificate[] x509Certificates, String s, Socket socket)
                throws CertificateException {}
 
            @Override
            public void checkServerTrusted(
                X509Certificate[] x509Certificates, String s, Socket socket)
                throws CertificateException {}
 
            @Override
            public void checkClientTrusted(
                X509Certificate[] x509Certificates, String s, SSLEngine sslEngine)
                throws CertificateException {}
 
            @Override
            public void checkServerTrusted(
                X509Certificate[] x509Certificates, String s, SSLEngine sslEngine)
                throws CertificateException {}
 
            @Override
            public void checkClientTrusted(X509Certificate[] x509Certificates, String s)
                throws CertificateException {}
 
            @Override
            public void checkServerTrusted(X509Certificate[] x509Certificates, String s)
                throws CertificateException {}
 
            @Override
            public X509Certificate[] getAcceptedIssuers() {
              return null;
            }
          }
        };
 
    try {
      SSLContext ssl = SSLContext.getInstance("SSL");
      ssl.init(null, trustAllCerts, new java.security.SecureRandom());
      SSLSocketFactory socketFactory = ssl.getSocketFactory();
      client.setSocketFactory(socketFactory);
    } catch (Exception e) {
      log.error("ReConnectWebSocketClient trustAllHosts 异常，e={0}", e);
    }
  }
}

  public static void main(String[] args) throws Exception {
    ReConnectWebSocketClient client =
        new ReConnectWebSocketClient(
            new URI(String.format("wss://192.168.1.77:24009")),
            "test",
            // 字符串消息处理
            msg -> {
              // todo 字符串消息处理
              System.out.println("字符串消息:" + msg);
            },
            null,
            // 异常回调
            error -> {
              // todo 字符串消息处理
              System.out.println("异常:" + error.getMessage());
            });
    client.connect();
    client.send("haha");
  }