java实现MD5加密

1 加密方法：

java.security.MessageDigest

 public class MD5Utils {     public static String stringToMD5(String plainText) {         byte[] secretBytes = null;         try {             secretBytes = MessageDigest.getInstance("md5").digest(                     plainText.getBytes());         } catch (NoSuchAlgorithmException e) {             throw new RuntimeException("没有这个md5算法！");         }         String md5code = new BigInteger(1, secretBytes).toString(16);         for (int i = 0; i < 32 - md5code.length(); i++) {             md5code = "0" + md5code;         }         return md5code;     }  }

org.springframework.util.DigestUtils

 DigestUtils.md5DigestAsHex("1234".getBytes())

• 1

2 使用方法：

 @Test public void testMd5() throws NoSuchAlgorithmException{     MessageDigest md = MessageDigest.getInstance("MD5");     // java自带工具包MessageDigest       String resultString = MD5Utils.md5("123456");     System.out.println(resultString);     // e10adc3949ba59abbe56e057f20f883e     String resultString1 = MD5Utils.md5("1234");     System.out.println(resultString1);     //81dc9bdb52d04dc20036dbd8313ed055      // spring自带工具包DigestUtils     System.out.println(DigestUtils.md5DigestAsHex("1234".getBytes()));     // 81dc9bdb52d04dc20036dbd8313ed055 }

来源：51CTO

作者：那些年的代码

链接：https://blog.csdn.net/weixin_44018338/article/details/100121504