code: public static void send(String host, int port, InputStream ins, OutputStream ops, int timeout) {
          Socket socket = null;
          try {
              socket = new Socket();
              socket.connect(new InetSocketAddress(host, port), timeout);
              // 发送关闭命令
              OutputStream sOut = socket.getOutputStream();
              Streams.write(sOut, ins);
              sOut.flush();
  
              // 接收服务器的反馈
              if (!socket.isClosed()) {
                  InputStream sReturn = socket.getInputStream();
                  Streams.write(ops, sReturn);
              }
          }
          catch (IOException e) {
              throw Lang.wrapThrow(e);
          }
          finally {
              Streams.safeClose(ins);
              Streams.safeClose(ops);
              safeClose(socket);
          }
      }
docs: 向某主机发送一些字节内容，并将返回写入输出流
  
  @param host
  主机
  @param port
  端口
  @param ins
  发送的内容
  @param ops
  主机返回的输入流