package unit;

 import javax.crypto.Cipher;

 import javax.crypto.spec.IvParameterSpec;

 import javax.crypto.spec.SecretKeySpec;

 import org.apache.commons.codec.binary.Base64;

 /**

  * AES/CBC/PKCS5Padding 对称加密

  * @author jia

  *

  */

 public class AES_CBC {

      private static final String ALGORITHM = "AES/CBC/PKCS5Padding";

         /**

          * 数据加密

          * @param srcData

          * @param key

          * @param iv

          * @return

          */

         public static String encrypt(String srcData,byte[] key,byte[] iv)

         {

             SecretKeySpec keySpec = new SecretKeySpec(key, "AES");

             Cipher cipher;

             String encodeBase64String = null;

             try {

                 cipher = Cipher.getInstance(ALGORITHM);

                 cipher.init(Cipher.ENCRYPT_MODE, keySpec, new IvParameterSpec(iv));

                 byte[] encData = cipher.doFinal(srcData.getBytes());

                 encodeBase64String = Base64.encodeBase64String(encData);

             } catch (Exception e) {

                 e.printStackTrace();

             }

             return encodeBase64String;

         }

         /**

          * 数据解密

          * @param encDataStr

          * @param key

          * @param iv

          * @return

          */

         public static String decrypt(String encDataStr,byte[] key,byte[] iv)

         {

             byte[] encData = Base64.decodeBase64(encDataStr);

             SecretKeySpec keySpec = new SecretKeySpec(key, "AES");

             Cipher cipher;

             byte[] decbbdt = null;

             try {

                 cipher = Cipher.getInstance(ALGORITHM);

                 cipher.init(Cipher.DECRYPT_MODE, keySpec, new IvParameterSpec(iv));

                 decbbdt = cipher.doFinal(encData);

             } catch (Exception e) {

                 e.printStackTrace();

             }

             return new String(decbbdt);

         }

     public static void main(String[] args) throws Exception {

         String str = "fot4Ginq4iey7kLUUmA+dA==";

         byte[] s = Base64.decodeBase64(str);

         String s2 = "12345678ilkljklkjv";

         String iv = "1234567890123456";

         System.out.println("加密前： "+s2);

         String encrypt = AES_CBC.encrypt(s2, s, iv.getBytes());

         System.out.println("加密后： "+new String(encrypt));

         String decrypt = AES_CBC.decrypt(encrypt, s, iv.getBytes());

         System.out.println("解密后： "+decrypt);

     }

 }