[java] MD5

MD5 

param = 암호화하려는 문자열

public static String getMD5(String str){
        String rtnMD5 = "";
        try {
            
            MessageDigest md = MessageDigest.getInstance("MD5");
          
            md.update(str.getBytes());
           
            byte byteData[] = md.digest();
            StringBuffer sb = new StringBuffer();
           
            for(byte byteTmp : byteData) {
                sb.append(Integer.toString((byteTmp&0xff) + 0x100, 16).substring(1));
            }
            rtnMD5 = sb.toString();
        } catch (Exception e) {
            e.printStackTrace(); 
            rtnMD5 = null; 
        }
        return rtnMD5;
    }