Java加密算法Triple DES，加密算法tripledes,import javax

Java加密算法Triple DES，加密算法tripledes,import javax

import javax.crypto.Cipher;  import javax.crypto.KeyGenerator;  import javax.crypto.SecretKey;  import javax.crypto.SecretKeyFactory;  import javax.crypto.spec.DESedeKeySpec;  import javax.crypto.spec.IvParameterSpec;  /**  * 三重加密 3DES也作 Triple DES,  *   * @author stone  * @date 2014-03-10 02:14:37  */  public class TripleDES {      // 算法名称      public static final String KEY_ALGORITHM = "DESede";      // 算法名称/加密模式/填充方式      public static final String CIPHER_ALGORITHM_ECB = "DESede/ECB/PKCS5Padding";      public static final String CIPHER_ALGORITHM_CBC = "DESede/CBC/PKCS5Padding";      private KeyGenerator keyGen;      private SecretKey secretKey;      private SecretKey secretKey2;      private Cipher cipher;      private static byte[] encryptData;      public static void main(String[] args) throws Exception {          TripleDES tripleDES = new TripleDES("ECB");          tripleDES.encrypt("sau8jzxlcvm,'123`98(*^&amp;%^^JCB ZX>>A<S<}}{");          System.out.println("加密后：" + new String(encryptData));          System.out.println("解密后："+ new String(tripleDES.decrypt(encryptData)));          tripleDES = new TripleDES("CBC");          tripleDES.encrypt2("sau8jzxlc DQV#><&laquo;|vm,'123`98(*^&amp;%^^JCB ZX>>A<S<}}{");          System.out.println("加密后：" + new String(encryptData));          System.out.println("解密后："+ new String(tripleDES.decrypt2(encryptData)));      }      public TripleDES(String mode) throws Exception {          if ("ECB".equals(mode)) {  //          cipher = Cipher.getInstance(KEY_ALGORITHM);              cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);              keyGen = KeyGenerator.getInstance(KEY_ALGORITHM);              secretKey = keyGen.generateKey();          } else if("CBC".equals(mode)) {              cipher = Cipher.getInstance(CIPHER_ALGORITHM_CBC);              keyGen = KeyGenerator.getInstance(KEY_ALGORITHM);              DESedeKeySpec spec = new DESedeKeySpec(keyGen.generateKey().getEncoded());              secretKey2 = SecretKeyFactory.getInstance(KEY_ALGORITHM).generateSecret(spec);          }      }      /**      * 加密      * @param str      * @return      * @throws Exception      */      public byte[] encrypt(String str) throws Exception {          cipher.init(Cipher.ENCRYPT_MODE, secretKey);          return encryptData = cipher.doFinal(str.getBytes());      }      /**      * 解密      * @param encrypt      * @return      * @throws Exception      */      public byte[] decrypt(byte[] encrypt) throws Exception {          cipher.init(Cipher.DECRYPT_MODE, secretKey);          return encryptData = cipher.doFinal(encrypt);      }      byte[] getIV() {          return "administ".getBytes();      }      /**      * 加密      * @param str      * @return      * @throws Exception      */      public byte[] encrypt2(String str) throws Exception {          cipher.init(Cipher.ENCRYPT_MODE, secretKey2, new IvParameterSpec(getIV()));          return encryptData = cipher.doFinal(str.getBytes());      }      /**      * 解密      * @param encrypt      * @return      * @throws Exception      */      public byte[] decrypt2(byte[] encrypt) throws Exception {          cipher.init(Cipher.DECRYPT_MODE, secretKey2, new IvParameterSpec(getIV()));          return encryptData = cipher.doFinal(encrypt);      }  }