如何加密一个Java对象

Question

public class A{
   private String a;
   public String getA(){
      return a;
   }   public void setA(String a){
      this.a = a;
   }
}A aa = new A();
aa.setA("aaa");现在需要把aa这个对象加密后写入到本地文件，请问把aa对象加密这一步怎么做？谢谢

Answer 1

// 加密             try {
            A aa = new A();
            File file = new File("c:\\aa.dat");            // 加密的
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(baos);
            out.writeObject(aa);
            
            byte[] domBytes = baos.toByteArray();
            // Panoweaver stitching parameter DES encrypt key
            byte[] desKeyData = "pspDESek".getBytes();
            DESKeySpec desKeySpec = new DESKeySpec(desKeyData);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey desKey = keyFactory.generateSecret(desKeySpec);
            Cipher des = Cipher.getInstance("DES");
            des.init(Cipher.ENCRYPT_MODE, desKey);
            FileOutputStream fout = new FileOutputStream(file);
            CipherOutputStream cout = new CipherOutputStream(fout, des);
            cout.write(domBytes);
            cout.flush();
            cout.close();
            baos.close();
        } catch (InvalidKeyException ex) {
            ex.printStackTrace();
        } catch (NoSuchAlgorithmException ex) {
            ex.printStackTrace();
        } catch (InvalidKeySpecException ex) {
            ex.printStackTrace();
        } catch (NoSuchPaddingException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }

Answer 2

java本身就有加密的，DES算法好象可以直接调用的。

Answer 3

哦,还是DES算法呢.我倒没注意过.chenweionline(键盘上的舞者),写的比较详细的.
其中:
byte[] desKeyData = "pspDESek".getBytes();
desKeyData,应是密钥.实际应用中保存到其它地方为宜.