Java MD5 32位加密工具类

淩亂°似流年 2024-04-06 14:45 69阅读 0赞

import java.math.BigInteger;
    import java.security.MessageDigest;
    import java.security.NoSuchAlgorithmException;
    
    /**
    *
    * @description:
    * @author: lkm
    * @date: 2023/6/16 14:32
    **/
    public class MD5Util{
        
    
        public static byte[] mdBytes = null;
    
        /**
        *
        * @description: MD5加密大写
        * @author: lkm
        * @date: 2023/6/16 14:33
        **/
        public static String stringToUpperMD5(String data) {
        
            try {
        
                mdBytes = MessageDigest.getInstance("MD5").digest(
                        data.getBytes());
            } catch (NoSuchAlgorithmException e) {
        
                throw new RuntimeException("MD5不存在！");
            }
            String mdCode = new BigInteger(1, mdBytes).toString(16);
    
            if(mdCode.length() < 32) {
        
                int a = 32 - mdCode.length();
                for (int i = 0; i < a; i++) {
        
                    mdCode = "0"+mdCode;
                }
            }
            return mdCode.toUpperCase();
        }
    
        /**
         *
         * @description: MD5加密小写
         * @author: lkm
         * @date: 2023/6/16 14:33
         **/
        public static String stringToLowerMD5(String data) {
        
            try {
        
                mdBytes = MessageDigest.getInstance("MD5").digest(
                        data.getBytes());
            } catch (NoSuchAlgorithmException e) {
        
                throw new RuntimeException("MD5不存在！");
            }
            String mdCode = new BigInteger(1, mdBytes).toString(16);
    
            if(mdCode.length() < 32) {
        
                int a = 32 - mdCode.length();
                for (int i = 0; i < a; i++) {
        
                    mdCode = "0"+mdCode;
                }
            }
            return mdCode;         
        }
    }