Question

我正在尝试别人的AES文件加密/解密程序，但问题是它保持提示并说找不到文件，但我确实把文件放在我的netbean中并放了一个目录但仍未找到。有什么问题？这是代码

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Scanner;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;


public class AESEncryptor {

 public void encrypt(String fname) throws Exception{
  KeyGenerator keyGen = KeyGenerator.getInstance("AES");
  keyGen.init(256);  //using AES-256
  SecretKey key = keyGen.generateKey();  //generating key
  Cipher aesCipher = Cipher.getInstance("AES");  //getting cipher for AES
  aesCipher.init(Cipher.ENCRYPT_MODE, key);  //initializing cipher for         encryption with key

  //creating file output stream to write to file
  try(FileOutputStream fos = new FileOutputStream(fname+".aes")){
   //creating object output stream to write objects to file
   ObjectOutputStream oos = new ObjectOutputStream(fos);
   oos.writeObject(key);  //saving key to file for use during decryption

   //creating file input stream to read contents for encryption
   try(FileInputStream fis = new FileInputStream(fname)){
    //creating cipher output stream to write encrypted contents
    try(CipherOutputStream cos = new CipherOutputStream(fos, aesCipher)){
     int read;
     byte buf[] = new byte[4096];
     while((read = fis.read(buf)) != -1)  //reading from file
      cos.write(buf, 0, read);  //encrypting and writing to file
    }
   }
  }

 }

 public void decrypt(String fname)throws Exception{
  SecretKey key =null;

  //creating file input stream to read from file
  try(FileInputStream fis = new FileInputStream(fname)){
   //creating object input stream to read objects from file
   ObjectInputStream ois = new ObjectInputStream(fis);
   key = (SecretKey)ois.readObject();  //reading key used for encryption

   Cipher aesCipher = Cipher.getInstance("AES");  //getting cipher for AES
   aesCipher.init(Cipher.DECRYPT_MODE, key);  //initializing cipher for     decryption with key
   //creating file output stream to write back original contents
   try(FileOutputStream fos = new FileOutputStream(fname+".dec")){
    //creating cipher input stream to read encrypted contents
    try(CipherInputStream cis = new CipherInputStream(fis, aesCipher)){
     int read;
     byte buf[] = new byte[4096];
     while((read = cis.read(buf)) != -1)  //reading from file
      fos.write(buf, 0, read);  //decrypting and writing to file
    }
   }
  }

 }

 public static void main(String[] args) throws Exception {
  AESEncryptor obj = new AESEncryptor();
 File file = new     File("C://Users/Jasmine/Documents/NetBeansProjects/testing/clear.txt");

  obj.encrypt(file.getName());
  obj.decrypt("clear.txt.aes");
 }

}

Answer 1

您只是将文件名作为参数传递给encrypt方法，但是根据encrypt方法，它期望完整路径。确切地说，这行代码：

FileInputStream fis = new FileInputStream(fname)

而不是：

obj.encrypt(file.getName());

使用此：

obj.encrypt(file.getAbsolutePath());

继续跳出java.io.FileNotFoundException

1 个答案: