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我写的加解密代码如下

import java.io.*;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.crypto.BadPaddingException;
import java.nio.file.Files;
import java.util.Scanner;

public class EncryptFile
{
    public static void main(String args[]) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
//Encrypt Mode
        FileOutputStream outputStream = new FileOutputStream(new File("D:\\encryptedNewStringFile.txt"));
        Key secretKey = new SecretKeySpec("encKey".getBytes(), "Blowfish");
        Cipher cipher = Cipher.getInstance("Blowfish");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] getFileBytes = "writing a file using encryption ".getBytes();
        byte[] outputBytes = cipher.doFinal(getFileBytes);
        outputStream.write(outputBytes);
        getFileBytes …