Question

我遇到以下代码问题。

如果我使用ObjectOutputStream，一切运行正常但是当我尝试使用CipherOutputStream时，我在服务器端遇到以下错误。

如果我发送一个文件，我就不会完全收到。如果我发送了多个文件，则最后一个文件没有完全收到，但前面的文件是。

它可能是什么？

我见过其他帖子，但他们没有帮助我。

java.lang.ArrayIndexOutOfBoundsException
    at java.lang.System.arraycopy(Native Method)
    at java.io.BufferedOutputStream.write(BufferedOutputStream.java:128)
    at myCloudServer$myCloudServerThread.run(myCloudServer.java:257)

客户端代码。发送文件。

SocketFactory socketFactory = SSLSocketFactory.getDefault();
clientSocket = socketFactory.createSocket(serverAddress[0], Integer.parseInt(serverAddress[1]));

ObjectInputStream objectInputStream = new ObjectInputStream(clientSocket.getInputStream());
ObjectOutputStream objectOutputStream = new ObjectOutputStream(clientSocket.getOutputStream());

[...]

byte[] buffer = new byte[1024];
objectOutputStream.writeObject(sendingClientFiles.size());

for (File sendingClientFile : sendingClientFiles) {
    [...]

    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(128);
    SecretKey secretKeyEncrypt = keyGenerator.generateKey();    

    Cipher cipherEncrypt = Cipher.getInstance("AES");   
    cipherEncrypt.init(Cipher.ENCRYPT_MODE, secretKeyEncrypt);
    CipherOutputStream cipherOutputStream = new CipherOutputStream(objectOutputStream, cipherEncrypt);    

    BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(sendingClientFile));
    int count = 0;
    while ((count = bufferedInputStream.read(buffer, 0, buffer.length)) != -1) {
        //objectOutputStream.write(buffer, 0, count);
        cipherOutputStream.write(buffer, 0, count);
    }

    bufferedInputStream.close();
    //objectOutputStream.flush();
    cipherOutputStream.flush();
}

服务器代码。收到文件。

ServerSocketFactory serverSocketFactory = SSLServerSocketFactory.getDefault();
serverSocket = serverSocketFactory.createServerSocket(port);

Socket clientSocket = serverSocket.accept();

ObjectOutputStream objectOutputStream = new ObjectOutputStream(clientSocket.getOutputStream());
ObjectInputStream  objectInputStream  = new ObjectInputStream(clientSocket.getInputStream());

[...]

byte[] buffer = new byte[1024];
int i = 0;
int receivingClientFiles = (int) objectInputStream.readObject();

while(i < receivingClientFiles) {
    [...]

    BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(diretorio + "/" + fileName));
    int count = 0;                      
    int received = 0;
    while (received < fileLength) {
        count = objectInputStream.read(buffer, 0,  buffer.length);
        bufferedOutputStream.write(buffer, 0, count);
        received += count;
    }
    //while ((count = objectInputStream.read(buffer, 0, buffer.length)) != -1) {
    //  bufferedOutputStream.write(buffer, 0, count);
    //}

    bufferedOutputStream.close();

    i++;
}

Answer 1

在count = objectInputStream.read(buffer, 0, buffer.length);中，您应该最大化文件大小（因为您可能会从下一个文件中读取字节）。并且该特定文件大小必须是流的加密长度，而不是原始文件大小（如果它们不同，那就是）。

CipherOutputStream无法正常工作

1 个答案: