也许我缺少了一些东西，但就我而言，它可以正常工作。您能否仅通过更改fileToBeCrypted，fileToBeDecrypted和fileDecryptedOutput变量来尝试以下类？
package test;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.security.InvalidKeyException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Arrays;import javax.crypto.Cipher;import javax.crypto.CipherInputStream;import javax.crypto.CipherOutputStream;import javax.crypto.NoSuchPaddingException;import javax.crypto.spec.SecretKeySpec;public class TestCrypt{ private static final String salt = "t784"; private static final String cryptPassword = "873147cbn9x5'2 79'79314"; private static final String fileToBeCrypted = "c:\Temp\sampleFile.conf"; private static final String fileToBeDecrypted = "c:\Temp\sampleFile.conf.crypt"; private static final String fileDecryptedOutput = "c:\Temp\sampleFile.conf.decrypted"; public static void main(String[] args) throws Exception { for (int i=0; i<100; i++) { encryptfile(fileToBeCrypted, cryptPassword); decrypt(fileToBeDecrypted, cryptPassword, fileDecryptedOutput); System.out.println(i); } } public static void encryptfile(String path,String password) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException { FileInputStream fis = new FileInputStream(path); FileOutputStream fos = new FileOutputStream(path.concat(".crypt")); byte[] key = (salt + password).getBytes("UTF-8"); MessageDigest sha = MessageDigest.getInstance("SHA-1"); key = sha.digest(key); key = Arrays.copyOf(key,16); SecretKeySpec sks = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, sks); CipherOutputStream cos = new CipherOutputStream(fos, cipher); int b; byte[] d = new byte[8]; while((b = fis.read(d)) != -1) { cos.write(d, 0, b); } cos.flush(); cos.close(); fis.close(); } public static void decrypt(String path,String password, String outPath) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException { FileInputStream fis = new FileInputStream(path); FileOutputStream fos = new FileOutputStream(outPath); byte[] key = (salt + password).getBytes("UTF-8"); MessageDigest sha = MessageDigest.getInstance("SHA-1"); key = sha.digest(key); key = Arrays.copyOf(key,16); SecretKeySpec sks = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.DECRYPT_MODE, sks); CipherInputStream cis = new CipherInputStream(fis, cipher); int b; byte[] d = new byte[8]; while((b = cis.read(d)) != -1) { fos.write(d, 0, b); } fos.flush(); fos.close(); cis.close(); }}我可以多次迭代而不会出错！我正在使用Oracle JDK 1.8，但在1.7兼容模式下运行。
希望这可以帮助你。
