pom依赖

org.java-websocket Java-WebSocket 1.3.8

    <dependency>  
        <groupId>com.alibaba</groupId>  
        <artifactId>fastjson</artifactId>  
        <version>1.2.75</version>  
    </dependency>

fastjson是用来发送json数据的 可以用自己的

MyWebSocketClient.java

import java.net.URI;
import com.alibaba.fastjson.JSONObject;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
* websocket客户端监听类
* @author 。
*/
public class MyWebSocketClient extends WebSocketClient {

private static Logger logger = LoggerFactory.getLogger(MyWebSocketClient.class);

public MyWebSocketClient(URI serverUri) {  
    super(serverUri);  
}

@Override  
public void onOpen(ServerHandshake serverHandshake) {  
    logger.info(">>>>>>>>>>>websocket open");  
}

@Override  
public void onMessage(String s) {  
    logger.info(">>>>>>>>>> websocket message");

}

@Override  
public void onClose(int i, String s, boolean b) {  
    logger.info(">>>>>>>>>>>websocket close");  
}

@Override  
public void onError(Exception e) {  
    logger.error(">>>>>>>>>websocket error {}",e);  
}

}

使用

public static void main(String[] args) {
try {
MyWebSocketClient myClient = new MyWebSocketClient(new URI("ws://192.168.2.20:8080"));
myClient.connect();
while (!myClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)) {
System.out.println("连接中。。。");
Thread.sleep(1000);
}
// 连接成功往websocket服务端发送数据
JSONObject object = new JSONObject();
object.put("message", "success连接");
myClient.send(object.toJSONString());
} catch (Exception e) {
e.printStackTrace();
}
}

使用完之后 可以调用myClient.close()方法关闭