AES/CBC/PKCS5Padding對稱加密

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 對稱加密
 * @author jia
 *
 */
public class AES_CBC {

     private static final String ALGORITHM = "AES/CBC/PKCS5Padding";
        /**
         * 數據加密
         * @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;
        }

        /**
         * 數據解密
         * @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);
    }
}