Java 如何从套接字读取JSON数据而不是一行？

我的应用程序通过WiFi直接连接到传感器。然后，它连接到一个套接字，并应该读取数据。数据是JSON，看起来像{“d”：{temp_mC；33416，“湿度_ppm”…更多数据…}。传感器每2分钟发送一次数据。以前我只能读取服务器发送的行，但由于传感器不发送行，我需要重做我的TCPClient类。我认为我可以实现这段代码

ByteArrayOutputStream result = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = socket.getInputStream().read(buffer)) != -1) {
result.write(buffer, 0, length);
}
// StandardCharsets.UTF_8.name() > JDK 7
return result.toString("UTF-8");

为了将JSON数据转换成字符串，我必须对其进行解析，但这是以后的事情

我的旧代码是这样的，有人知道我如何重新编写我的旧代码来实现上述方法或类似的方法，这样我就可以读取JSON数据并将其转换为字符串，以便以后可以解析它吗

TCP客户

public class TcpClient {

....

/**
 * Constructor of the class. OnMessagedReceived listens for the messages received from server
 */
public TcpClient(OnMessageReceived listener) {
    mMessageListener = listener;

}

/**
 * Sends the message entered by client to the server
 *
 * @param message text entered by client
 */

/**
 * Close the connection and release the members
 */
public void stopClient() {

    mRun = false;

    mMessageListener = null;
    mBufferIn = null;
    mServerMessage = null;
}

public void run() {

    mRun = true;

    try {
        //here you must put your computer's IP address.
        InetAddress serverAddr = InetAddress.getByName(SERVER_IP);

        Log.e("TCP Client", "C: Connecting...");

        //create a socket to make the connection with the server
        Socket socket = new Socket(serverAddr, SERVER_PORT);

        try {


            //receives the message which the server sends back
            mBufferIn = new BufferedReader(new InputStreamReader(socket.getInputStream()));


            //in this while the client listens for the messages sent by the server
            while (mRun) {

                mServerMessage = mBufferIn.readLine();

                if (mServerMessage != null && mMessageListener != null) {
                    //call the method messageReceived from MyActivity class
                    mMessageListener.messageReceived(mServerMessage);
                }

            }

            Log.e("RESPONSE FROM SERVER", "S: Received Message: '" + mServerMessage + "'");

        } catch (Exception e) {

            Log.e("TCP", "S: Error", e);

        } finally {
            //the socket must be closed. It is not possible to reconnect to this socket
            // after it is closed, which means a new socket instance has to be created.
            socket.close();
        }

    } catch (Exception e) {

        Log.e("TCP", "C: Error", e);

    }

}

//Declare the interface. The method messageReceived(String message) will must be implemented in the MyActivity
//class at on asynckTask doInBackground
public interface OnMessageReceived {
    public void messageReceived(String message);
}

}

我的班级在其他活动中

  public class ConnectTask extends AsyncTask<String, String, TcpClient> {

    @Override
    protected TcpClient doInBackground(String... message) {

        //we create a TCPClient object
        mTcpClient = new TcpClient(new TcpClient.OnMessageReceived() {
            @Override
            //here the messageReceived method is implemented
            public void messageReceived(String message) {
                //this method calls the onProgressUpdate
                publishProgress(message);
            }
        });
        mTcpClient.run();

        return null;
    }

    @Override
    protected void onProgressUpdate(String... values) {
        super.onProgressUpdate(values);
        CO2 = values[0];
        //response received from server
        Log.d("CO2", values[0]);
        //process server response here....

    }

}

公共类ConnectTask扩展了异步任务{
@凌驾
受保护的TcpClient doInBackground（字符串…消息）{
//我们创建一个TCPClient对象
mTcpClient=新的TcpClient（新的TcpClient.OnMessageReceived（）{
@凌驾
//这里实现了messageReceived方法
已接收公共无效消息（字符串消息）{
//此方法调用onProgressUpdate
出版进度（信息）；
}
});
mTcpClient.run（）；
返回null；
}
@凌驾
受保护的void onProgressUpdate（字符串…值）{
super.onProgressUpdate（值）；
CO2=数值[0]；
//从服务器收到的响应
Log.d（“CO2”，数值[0]）；
//在此处处理服务器响应。。。。
}
}
处理这种情况的正确方法是立即发送整个数据

这可以通过以下方式首先发送数据大小，然后发送数据内容：

outputStream.writeInt(message.length); 
outputStream.write(message);

int len = socketDataInputStream.readInt();                    
byte[] message = new byte[len];
socketDataInputStream.readFully(message, 0, message.length);

阅读消息时，解析长度，然后像这样阅读整个消息：

outputStream.writeInt(message.length); 
outputStream.write(message);

int len = socketDataInputStream.readInt();                    
byte[] message = new byte[len];
socketDataInputStream.readFully(message, 0, message.length);

希望这有帮助，祝好运。
当您说“发送数据大小”时“，你是说从传感器上？因为我无法对传感器进行编程。对不起，我理解错了。如果数据是从一个没有换行符的服务器发送的，这是正常的，你有经验吗？我应该联系制造传感器的公司吗？或者有没有一个解决方案来读取数据，并将每个新数据放在一个单独的字符串中？似乎我误解了您的意思，您是否只需要将JSON消息转换为字符串并在以后解析它？“com.google.code.gson”可以轻松做到这一点。将其作为“compile'com.google.code.gson:gson:2.8.0”包含在你的应用程序gradle中。如果从服务器发送的数据结束时没有换行符，那是因为发送者没有在每次发送后关闭套接字。一个解决办法是检查发送的数据是否小于缓冲区，然后将其视为消息的结尾。