content: 
  package com.platform.utils;
  
  import javax.crypto.Cipher;
  import javax.crypto.SecretKey;
  import javax.crypto.SecretKeyFactory;
  import javax.crypto.spec.DESKeySpec;
  import javax.crypto.spec.IvParameterSpec;
  import java.nio.charset.StandardCharsets;
  
  /**
   * 加密
   * @author AllDataDC
   * @date 2023-01-27
   */
  
  public class EncryptUtils {
  
      private static final String STR_PARAM = "Passw0rd";
  
      private static Cipher cipher;
  
      private static final IvParameterSpec IV = new IvParameterSpec(STR_PARAM.getBytes(StandardCharsets.UTF_8));
  
      private static DESKeySpec getDesKeySpec(String source) throws Exception {
          if (source == null || source.length() == 0){
              return null;
          }
          cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
          String strKey = "Passw0rd";
          return new DESKeySpec(strKey.getBytes(StandardCharsets.UTF_8));
      }
  
      /**
       * 对称加密
       */
      public static String desEncrypt(String source) throws Exception {
          DESKeySpec desKeySpec = getDesKeySpec(source);
          SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
          SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
          cipher.init(Cipher.ENCRYPT_MODE, secretKey, IV);
          return byte2hex(
                  cipher.doFinal(source.getBytes(StandardCharsets.UTF_8))).toUpperCase();
      }
  
      /**
       * 对称解密
       */
      public static String desDecrypt(String source) throws Exception {
          byte[] src = hex2byte(source.getBytes(StandardCharsets.UTF_8));
          DESKeySpec desKeySpec = getDesKeySpec(source);
          SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
          SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
          cipher.init(Cipher.DECRYPT_MODE, secretKey, IV);
          byte[] retByte = cipher.doFinal(src);
          return new String(retByte);
      }
  
      private static String byte2hex(byte[] inStr) {
          String stmp;
          StringBuilder out = new StringBuilder(inStr.length * 2);
          for (byte b : inStr) {
              stmp = Integer.toHexString(b & 0xFF);
              if (stmp.length() == 1) {
                  // 如果是0至F的单位字符串，则添加0
                  out.append("0").append(stmp);
              } else {
                  out.append(stmp);
              }
          }
          return out.toString();
      }
  
      private static byte[] hex2byte(byte[] b) {
          int size = 2;
          if ((b.length % size) != 0){
              throw new IllegalArgumentException("长度不是偶数");
          }
          byte[] b2 = new byte[b.length / 2];
          for (int n = 0; n < b.length; n += size) {
              String item = new String(b, n, 2);
              b2[n / 2] = (byte) Integer.parseInt(item, 16);
          }
          return b2;
      }
  }
  