Java端sqlserver数据库des加密 东师理想

1. 在这里以一个Java程序举例说明，分为一个加密、解密类，一个测试类，废话少说，上代码
2. 加密、解密类

   import java.security.Key;
   import java.security.spec.AlgorithmParameterSpec;
   
   import javax.crypto.Cipher;
   import javax.crypto.SecretKeyFactory;
   import javax.crypto.spec.DESKeySpec;
   import javax.crypto.spec.IvParameterSpec;
   
   import sun.misc.BASE64Decoder;
   import sun.misc.BASE64Encoder;
   
   
   /**
    *
    * @author Administrator
    */
   
   public class CryptoTools {
      // DES加密的私钥，必须是8位长的字符串
       private static final byte[] DESkey = "12345678".getBytes();// 设置密钥
   
       private static final byte[] DESIV = "zhoufeng".getBytes();// 设置向量
   
       static AlgorithmParameterSpec iv = null;// 加密算法的参数接口，IvParameterSpec是它的一个实现
       private static Key key = null;
   
       public CryptoTools() throws Exception {
           DESKeySpec keySpec = new DESKeySpec(DESkey);// 设置密钥参数
           iv = new IvParameterSpec(DESIV);// 设置向量
           SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// 获得密钥工厂
           key = keyFactory.generateSecret(keySpec);// 得到密钥对象
   
       }
   
       /**
        * <p>功能:加密</p>
        * @author 周枫
        * @date 2012-4-5
        * @param 
        * @return String
        */
       public String encode(String data) throws Exception {
           Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");// 得到加密对象Cipher
           enCipher.init(Cipher.ENCRYPT_MODE, key, iv);// 设置工作模式为加密模式，给出密钥和向量
           byte[] pasByte = enCipher.doFinal(data.getBytes("utf-8"));
           BASE64Encoder base64Encoder = new BASE64Encoder();
           return base64Encoder.encode(pasByte);
       }
   
       /**
        * <p>功能:解密</p>
        * @author 周枫
        * @date 2012-4-5
        * @param 
        * @return String
        */
       public String decode(String data) throws Exception {
           Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
           deCipher.init(Cipher.DECRYPT_MODE, key, iv);
           BASE64Decoder base64Decoder = new BASE64Decoder();
           byte[] pasByte = deCipher.doFinal(base64Decoder.decodeBuffer(data));
           return new String(pasByte, "UTF-8");
       }
   }

3. 测试类

   //测试
       public static void main(String[] args) throws Exception {
   
           CryptoTools tools = new CryptoTools();
           System.out.println("加密:" + tools.encode("123456"));
           System.out.println("解密:" + tools.decode(tools.encode("123456")));
       }

4. 成功了，哈哈