content: package org.jeecg.common.util.encryption;
  
  import org.apache.shiro.codec.Base64;
  
  import javax.crypto.Cipher;
  import javax.crypto.spec.IvParameterSpec;
  import javax.crypto.spec.SecretKeySpec;
  
  /**
   * AES 加密
   */
  public class AesEncryptUtil {
  
      //使用AES-128-CBC加密模式，key需要为16位,key和iv可以相同！
      private static String KEY = EncryptedString.key;
      private static String IV = EncryptedString.iv;
  
      /**
       * 加密方法
       * @param data  要加密的数据
       * @param key 加密key
       * @param iv 加密iv
       * @return 加密的结果
       * @throws Exception
       */
      public static String encrypt(String data, String key, String iv) throws Exception {
          try {
  
              Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");//"算法/模式/补码方式"NoPadding PkcsPadding
              int blockSize = cipher.getBlockSize();
  
              byte[] dataBytes = data.getBytes();
              int plaintextLength = dataBytes.length;
              if (plaintextLength % blockSize != 0) {
                  plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
              }
  
              byte[] plaintext = new byte[plaintextLength];
              System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
  
              SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
              IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
  
              cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
              byte[] encrypted = cipher.doFinal(plaintext);
  
              return Base64.encodeToString(encrypted);
  
          } catch (Exception e) {
              e.printStackTrace();
              return null;
          }
      }
  
      /**
       * 解密方法
       * @param data 要解密的数据
       * @param key  解密key
       * @param iv 解密iv
       * @return 解密的结果
       * @throws Exception
       */
      public static String desEncrypt(String data, String key, String iv) throws Exception {
          try {
  			byte[] encrypted1 = Base64.decode(data);
  
              Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
              SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
              IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
  
              cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
  
              byte[] original = cipher.doFinal(encrypted1);
              String originalString = new String(original);
              return originalString;
          } catch (Exception e) {
              e.printStackTrace();
              return null;
          }
      }
  
      /**
       * 使用默认的key和iv加密
       * @param data
       * @return
       * @throws Exception
       */
      public static String encrypt(String data) throws Exception {
          return encrypt(data, KEY, IV);
      }
  
      /**
       * 使用默认的key和iv解密
       * @param data
       * @return
       * @throws Exception
       */
      public static String desEncrypt(String data) throws Exception {
          return desEncrypt(data, KEY, IV);
      }
  
  
  
  //    /**
  //     * 测试
  //     */
  //    public static void main(String args[]) throws Exception {
  //        String test1 = "sa";
  //        String test =new String(test1.getBytes(),"UTF-8");
  //        String data = null;
  //        String key =  KEY;
  //        String iv = IV;
  //        // /g2wzfqvMOeazgtsUVbq1kmJawROa6mcRAzwG1/GeJ4=
  //        data = encrypt(test, key, iv);
  //        System.out.println("数据："+test);
  //        System.out.println("加密："+data);
  //        String jiemi =desEncrypt(data, key, iv).trim();
  //        System.out.println("解密："+jiemi);
  //    }
  
  }
  