解密后几个字符丢失

这是我原来的xml：

   12 Mickey Mouse   

这是经过加密/解密过程后的输出

    12 Mickey Mouse  </
 如您所见，缺少一些字符。 
 这是我的代码。 
 import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.CipherInputStream; import javax.crypto.CipherOutputStream; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.SecretKeySpec; public class Decrypter { /** * @param args * @throws IOException * @throws NoSuchPaddingException * @throws NoSuchAlgorithmException * @throws InvalidKeyException * @throws BadPaddingException * @throws IllegalBlockSizeException */ public static void main(String[] args) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException { // TODO Auto-generated method stub File iFile = new File("normal.xml"); FileInputStream fis = new FileInputStream(iFile); File oFile = new File("normal.xml.encrypted"); FileOutputStream fos = new FileOutputStream(oFile); String algorithm = "DESede"; byte[] keyBytes = new byte[] { 0x34, 0x11, 0x12, 0x06, 0x34, 0x11, 0x12, 0x06, 0x34, 0x11, 0x12, 0x06, 0x34, 0x11, 0x12, 0x06, 0x34, 0x11, 0x12, 0x06, 0x34, 0x11, 0x12, 0x06 }; SecretKeySpec key = new SecretKeySpec(keyBytes, algorithm); // generates encrypted output from normal.xml. Cipher cipher = Cipher.getInstance(algorithm); cipher.init(Cipher.ENCRYPT_MODE, key); CipherOutputStream cos = new CipherOutputStream(fos, cipher); int b; while ((b = fis.read()) != -1) { cos.write(b); } fos.close(); fos = null; fis.close(); fis = null; System.out.println("done"); // decrypt encrypted xml to normal xml. File ieFile = new File("normal.xml.encrypted"); FileInputStream fies = new FileInputStream(ieFile); Cipher ieCipher = Cipher.getInstance(algorithm); ieCipher.init(Cipher.DECRYPT_MODE, key); CipherInputStream cis = new CipherInputStream(fies, ieCipher); File oeFile = new File("normal.xml.encrypted.xml"); FileOutputStream foes = new FileOutputStream(oeFile); int c; while ((c = cis.read()) != -1) { foes.write(c); } foes.close(); cis.close(); fies.close(); System.out.println("done done"); } } 
 请帮忙。 谢谢。 







 
	
Answer 1
		      	
 发现了问题。 做 
  cos.close(); 
 在线之前： 
  fos.close(); 
 至少，它固定在我的盒子上。 


Answer 2
		      	
 写完加密输出后，调用 
 cos.close(); 
 代替 
 fos.close(); 
 关闭cos对象也会关闭底层的fos对象。 


Answer 3
		      	
 尝试关闭（或至少刷新）您的CipherOutputStream （ cos ），因为可能有一些字节从未写入原始加密文件。 


Answer 4
		      	
 同意JASON。 您必须关闭密码流而不是文件。 即使您可以显式关闭两者，但请确保先关闭密码流，然后再关闭文件流。 只有冲洗无济于事。 至少它不适合我。  🙂