AES加密算法实现

package com.julongtech.config.util;


import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;


import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;


import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;
import org.apache.log4j.Logger;


import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;


public class AESUtil {
  private static final Logger logger = Logger.getLogger(DESUtil.class);
  private static KeyGenerator keyGenerator = null;
  /**
   * AES加密
   * @param data 加密字符串
   * @param key 密钥 长度为8的倍数
   * @return byte[]
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24上午11:57:04
   */
  public static byte[] encryptMode(String data,String key){
    try {
      keyGenerator = KeyGenerator.getInstance("AES");
      keyGenerator.init(128);
      //生成key
      SecretKey secretKey = new SecretKeySpec(key.getBytes(), "AES");
      byte[] bytes = secretKey.getEncoded();
      //获取key
      Key AESKey = new SecretKeySpec(bytes, "AES");
      Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
      cipher.init(Cipher.ENCRYPT_MODE, AESKey);
      return  cipher.doFinal(data.getBytes());
    } catch (Exception e) {
      // TODO Auto-generated catch block
      logger.error("【AESUtil】加密发生异常",e);
    }
    return null;
  }


  /**
   * byte[]字符串转base64
   * @param bytes
   * @return String
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午01:52:36
   */
  public static String encodeBase64(byte[] bytes){
    return Base64.encode(bytes);
  }
  /**
   * base64 转byte[]
   * @param data
   * @return byte[]
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午02:40:00
   */
  public static byte[] decodeBase64(String data){
    return Base64.decode(data);
  }


  /**
   * AES解密算法
   * @param data 加密数据
   * @param key 密钥 长度为16的倍数
   * @return byte[]
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午02:00:06
   */
  public static byte[] decryptMode(byte[] data,String key){
    try {
      keyGenerator = KeyGenerator.getInstance("AES");
      keyGenerator.init(128);
      //生成key
      SecretKey secretKey = new SecretKeySpec(key.getBytes(), "AES");
      byte[] bytes = secretKey.getEncoded();
      //获取key
      Key AESKey = new SecretKeySpec(bytes, "AES");
      Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
      cipher.init(Cipher.DECRYPT_MODE, AESKey);
      return cipher.doFinal(data);
    } catch (Exception e) {
      // TODO: handle exception
      logger.error("【AESUtil】解密发生异常",e);
    }
    return null;
  }


  /**
   * 格式化为byte[] to  String 
   * @param bytes
   * @return String
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午02:02:29
   */
  public static String formatByteToString(byte[] bytes){
    return new String(bytes);
  }




  /**
   * AES 加密
   * @param data 加密的数据
   * @param key 秘钥
   * @return String
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午02:20:16
   */
  public static String encrypt(String data,String key){
    byte[]  bytes = encryptMode(data, key);
    return Base64.encode(bytes);
  }


  /**
   * AES 解密
   * @param data 加密的数据
   * @param key 秘钥
   * @return String
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午02:23:49
   */
  public static String decrypt(String data,String key){
    byte[] b = decodeBase64(data);
    byte[] bytes = decryptMode(b, key);
    return formatByteToString(bytes);
  }


  /**
   * @param args
   * @author julong
   * @QQ 330359149 
   * @Email [e-mail]
   * @date 2016-8-24下午04:30:04
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub


    String str1 = AESUtil.encrypt("12345julong1222222DAADASDADASDASDQWEQWEQE131231313213121", "1111111100000000");
    System.out.println(str1);
    String str2 = AESUtil.decrypt(str1, "1111111100000000");
    System.out.println(str2);
  }


}