java WebSocket 即时通讯服务端代码

ackage org.fh.plugins.ChatServer;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import org.java_websocket.WebSocket;
import org.java_websocket.framing.Framedata;
import org.java_websocket.handshake.ClientHandshake;
import org.java_websocket.server.WebSocketServer;
/**
 * 说明：websocket服务端
 * 作者：FH Admin
 * from：fhadmin.cn
 */
public class ChatServer extends WebSocketServer{
  public BulletChatServer(int port) throws UnknownHostException {
    super(new InetSocketAddress(port));
  }
  public BulletChatServer(InetSocketAddress address) {
    super(address);
  }
  /**
   * 客户端发送消息到服务器时触发事件
   */
  @Override
  public void onMessage(WebSocket conn, String message){
    message = message.toString();
    if(null != message && message.startsWith("[video313596790]")){
      this.userjoin(message.replaceFirst("\\[video313596790\\]", ""),conn);
    }else{
      BulletChatServerPlool.sendMessage(message.toString());//向所有在线用户发送消息
    }
  }
  public void onFragment( WebSocket conn, Framedata fragment ) {
  }
  /**
   * 用户加入处理
   * @param user
   */
  public void userjoin(String user, WebSocket conn){
    BulletChatServerPlool.addUser(user,conn);             //向连接池添加当前的连接对象
  }
  /**
   * 用户下线处理
   * @param user
   */
  public void userLeave(WebSocket conn){
    BulletChatServerPlool.removeUser(conn);               //在连接池中移除连接
  }
  /**
   * 触发连接事件
   */
  @Override
  public void onOpen( WebSocket conn, ClientHandshake handshake ) {}
  /**
   * 触发关闭事件
   */
  @Override
  public void onClose( WebSocket conn, int code, String reason, boolean remote ) {
    userLeave(conn);
  }
  /**
   * 触发异常事件
   */
  @Override
  public void onError( WebSocket conn, Exception ex ) {
    if( conn != null ) {}
  }
  @Override
  public void onStart() {}
}