content: package org.superboot.utils;
  
  
  import com.xiaoleilu.hutool.lang.Base64;
  import com.xiaoleilu.hutool.util.StrUtil;
  
  import javax.crypto.Cipher;
  import javax.crypto.KeyGenerator;
  import javax.crypto.spec.SecretKeySpec;
  import java.math.BigInteger;
  
  /**
   * <b> AES加解密工具类 </b>
   * <p>
   * 功能描述:提供基于AES的加解密算法
   * </p>
   */
  public class AESUtil {
  
      /**
       * 密钥 长度必须为16位
       */
      private static final String KEY = "key1310645891304";
  
      /**
       * 算法
       */
      private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
  
      public static void main(String[] args) throws Exception {
          String content = "123456";
          System.out.println("加密前：" + content);
  
          System.out.println("加密密钥和解密密钥：" + KEY);
  
          String encrypt = aesEncrypt(content, KEY);
          System.out.println("加密后：" + encrypt);
  
          String decrypt = aesDecrypt(encrypt, KEY);
          System.out.println("解密后：" + decrypt);
      }
  
      /**
       * aes解密
       *
       * @param encrypt 内容
       * @return
       * @throws Exception
       */
      public static String aesDecrypt(String encrypt) throws Exception {
          return aesDecrypt(encrypt, KEY);
      }
  
      /**
       * aes加密
       *
       * @param content
       * @return
       * @throws Exception
       */
      public static String aesEncrypt(String content) throws Exception {
          return aesEncrypt(content, KEY);
      }
  
      /**
       * 将byte[]转为各种进制的字符串
       *
       * @param bytes byte[]
       * @param radix 可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制
       * @return 转换后的字符串
       */
      public static String binary(byte[] bytes, int radix) {
          return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数
      }
  
      /**
       * base 64 encode
       *
       * @param bytes 待编码的byte[]
       * @return 编码后的base 64 code
       */
      public static String base64Encode(byte[] bytes) {
          return Base64.encode(bytes);
      }
  
      /**
       * base 64 decode
       *
       * @param base64Code 待解码的base 64 code
       * @return 解码后的byte[]
       * @throws Exception
       */
      public static byte[] base64Decode(String base64Code) throws Exception {
          return StrUtil.isEmpty(base64Code) ? null : Base64.decode(base64Code);
      }
  
  
      /**
       * AES加密
       *
       * @param content    待加密的内容
       * @param encryptKey 加密密钥
       * @return 加密后的byte[]
       * @throws Exception
       */
      public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
          KeyGenerator kgen = KeyGenerator.getInstance("AES");
          kgen.init(128);
          Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
          cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
  
          return cipher.doFinal(content.getBytes("utf-8"));
      }
  
  
      /**
       * AES加密为base 64 code
       *
       * @param content    待加密的内容
       * @param encryptKey 加密密钥
       * @return 加密后的base 64 code
       * @throws Exception
       */
      public static String aesEncrypt(String content, String encryptKey) throws Exception {
          return base64Encode(aesEncryptToBytes(content, encryptKey));
      }
  
      /**
       * AES解密
       *
       * @param encryptBytes 待解密的byte[]
       * @param decryptKey   解密密钥
       * @return 解密后的String
       * @throws Exception
       */
      public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
          KeyGenerator kgen = KeyGenerator.getInstance("AES");
          kgen.init(128);
  
          Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
          cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
          byte[] decryptBytes = cipher.doFinal(encryptBytes);
  
          return new String(decryptBytes);
      }
  
  
      /**
       * 将base 64 code AES解密
       *
       * @param encryptStr 待解密的base 64 code
       * @param decryptKey 解密密钥
       * @return 解密后的string
       * @throws Exception
       */
      public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
          return StrUtil.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
      }
  
  }
  