java - 如何从 TCP 套接字获取数据到 ByteBuffer

Question

我需要将传入数据从套接字获取到 ByteBuffer 中，但我不知道该怎么做。我是这个领域的新手，因此不确定最好的开始方式。我发现了以下内容，但这不是我想要的，因为它获取了在线数据，但我需要将所有数据保存在字节缓冲区中以用于其他目的。

ServerSocket welcomeSocket = new ServerSocket(Integer.parseInt(ibmPort));
while (true) {
    Socket connectionSocket = welcomeSocket.accept();                   
    BufferedReader inFromClient =  new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
    DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
    clientSentence = inFromClient.readLine();
    System.out.println("Received: " + clientSentence);
    setRequestDataFromCT(clientSentence);
    capitalizedSentence = clientSentence.toUpperCase() + '\n';
    outToClient.writeBytes(capitalizedSentence);
}

Answer 1

此代码将读取所有字节并将它们存储在 ByteBuffer 中，您可能需要调整 bufferSize 以存储您需要的所有数据。

int bufferSize = 8192;
ServerSocket welcomeSocket = new ServerSocket(Integer.parseInt(ibmPort));
while (true) {
    Socket connectionSocket = welcomeSocket.accept();
    ByteBuffer bf = ByteBuffer.allocate(bufferSize);
    BufferedInputStream inFromClient = new BufferedInputStream(connectionSocket.getInputStream());
    while (true) {
        int b = inFromClient.read();
        if (b == -1) {
            break;
        }
        bf.put( (byte) b);
    }
    connectionSocket.close();
}