Springboot: 将字符串加密为32位大写MD5数据

package com.zkfr.unifyplatforminteractserver_gansu.utils;

import java.security.MessageDigest;

public class Md5Util
{
    //加密为MD5-32位大写
    public static String encodeTo32BitCapitalByMd5( String str )
    {
        try
        {
            //确定计算方法
            MessageDigest md5 = MessageDigest.getInstance( "MD5" );

            //加密字符串
            byte[] md5Bytes = md5.digest(str.getBytes());

            //转换为32位大写
            StringBuilder stringBuilder = new StringBuilder();
            for( byte md5Byte : md5Bytes )
            {
                int val = ((int) md5Byte) & 0xff;
                if (val < 16)
                    stringBuilder.append("0");
                stringBuilder.append(Integer.toHexString(val));
            }

            return stringBuilder.toString().toUpperCase();
        }
        catch( Exception e )
        {
            e.printStackTrace();
            return null;
        }
    }
}