Java套接字损坏PNG图像

Question

我目前正试图使用Socket将PNG或JPEG图像从一个客户端发送到另一个客户端（在Java中），但图像总是被损坏（当我试图打开它时，它只是说因为它损坏、有故障或太大而无法打开）。我已经尝试过将图像加载到byte[]中的方法，如果我只是将一个图像加载到字节[]中，然后将其保存下来，它就可以完美地工作，所以问题一定出在字节[]的发送上。以下是我用于发送的功能：

/**
 * Attempts to send data through the socket with the BufferedOutputStream. <p>
 * Any safety checks should be done beforehand
 * @param data - the byte[] containing the data that shall be sent
 * @return - returns 'true' if the sending succeeded and 'false' in case of IOException
 */
public boolean sendData(byte[] data){
    try {
        //We simply try to send the data
        outS.write(data, 0, data.length);
        outS.flush();
        return true;    //Success
    } catch (IOException e) {
        e.printStackTrace();
        return false;   //Failed
    }
}
/**
 * Attempts to receive data sent to the socket. It uses a BufferedInputStream
 * @param size - the number of bytes that should be read
 * @return - byte[] with the received bytes or 'null' in case of an IOException
 */
public byte[] receiveData(int size){
    try {
        int read = 0, r;
        byte[] data = new byte[size];
        do{
            //We keep reading until we have gotten all data
            r = inS.read(data, read, size-read);
            if(r > 0)read += r;
        }while(r>-1 && read<size);  //We stop only if we either hit the end of the 
                            //data or if we have received the amount of data we expected
        return data;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

到达的图像似乎大小正确，所以数据至少到达了，只是被破坏了。

Answer 1

放弃receiveData()方法，使用DataInputStream.readFully()。