3des加密与解密

 // 向量  
    private final static String iv = "09876543" ;  
    // 加解密统一使用的编码方式  
    private final static String encoding = "utf-8" ;  
    private static final String ALGORITHM = "3DES"; // 加密算法名
   
    
 // 生成密钥  
    private static String getSecretKey() throws Exception {  
        KeyGenerator keyGenerator = null;  
        String key="";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String timer = sdf.format(new Date());
      
        
        try {  
            keyGenerator = KeyGenerator.getInstance(ALGORITHM); // Get the key generator  
            key=timer+Base64Utils.encode(keyGenerator.generateKey().toString().getBytes()).toString();
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
       
        return key; // Generate the secret key  
    }  
      
    /**
     * 3DES加密
     *  
     * @param plainText 普通文本
     * @return
     * @throws Exception  
     */
    public static String encode(String plainText,String secretKey) throws Exception {  
        Key deskey = null ;
       
        DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());  
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );  
        deskey = keyfactory.generateSecret(spec);  
       
        Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );  
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());  
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);  
        byte [] encryptData = cipher.doFinal(plainText.getBytes(encoding));  
        return Base64Utils.encode(encryptData);  
    }  
       
    /**
     * 3DES解密
     *  
     * @param encryptText 加密文本
     * @return
     * @throws Exception
     */
    public static String decode(String encryptText,String secretKey) throws Exception {  
        Key deskey = null ;  
        
        DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());   
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );  
        deskey = keyfactory.generateSecret(spec);  
        Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );  
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());  
        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);  
       
        byte [] decryptData = cipher.doFinal(Base64Utils.decode(encryptText));  
       
        return new String(decryptData, encoding);  
    }  

   

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