public static void main(String[] args) {
		Socket socket = null;
		try {
			socket = new Socket(host,port);
			// 请求连接为低成本连接
			socket.setTrafficClass(0x02);
			// 请求高性能与最小延时
			socket.setTrafficClass(0x04|0x10);
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			if(socket!=null)
				try {
					socket.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}