我如何加密BufferedImage才能被程序讀取？

Question

我有這樣的方法在這裏一類名爲緩衝區：

private static BufferedImage load(String s){ 
    BufferedImage image; 
      try{ 
       image = ImageIO.read(Buffers.class.getResourceAsStream(s)); 
       return image; 
      }catch(Exception e){ 
       e.printStackTrace(); 
      } 
      return null; 
} 

這一切都在項目中的圖形內容用來加載圖像。例如：

public static BufferedImage background = load("/path/"); 

---

我想知道是否有一種方法可以僅負載加密圖像，然後當用這種方法稱爲僅解密。

如果對我想問什麼有任何疑問，請告訴我。

謝謝！

Answer 1

辦法有加密的文件是使用CipherInputStream和CipherOutputStream：

private BufferedImage load(String s){ 
BufferedImage image; 
     try{ 
      image = ImageIO.read(getDecryptedStream(Buffers.class.getResourceAsStream(s))); 
      return image; 
     }catch(Exception e){ 
      e.printStackTrace(); 
     } 
     return null; 
} 

private InputStream getDecryptedStream(InputStream inputStream) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException{ 
    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); 
    cipher.init(Cipher.DECRYPT_MODE, this.key); 
    CipherInputStream input = new CipherInputStream(inputStream, cipher); 

    return input; 
} 

使用的OutputStream將文件保存

private OutputStream getEncryptedStream(OutputStream ouputStream) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException{ 
    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); 
    cipher.init(Cipher.ENCRYPT_MODE, this.key); 
    CipherOutputStream output = new CipherOutputStream(ouputStream, cipher); 

    return output; 
}