Md5Util 工具类

刺骨的言语ヽ痛彻心扉 2022-12-31 07:28 143阅读 0赞

1.Md5Util 工具类

>     public class Md5Util {
>         /**
>          * 全局数组
>          */
>         private final static String[] strDigits = {"0", "1", "2", "3", "4", "5",
>                 "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
>     
>         /**
>          * 返回形式为数字跟字符串
>          *
>          * @param bByte
>          * @return
>          */
>         private static String byteToArrayString(byte bByte) {
>             int iRet = bByte;
>             if (iRet < 0) {
>                 iRet += 256;
>             }
>             int iD1 = iRet / 16;
>             int iD2 = iRet % 16;
>             return strDigits[iD1] + strDigits[iD2];
>         }
>     
>         /**
>          * 返回形式只为数字
>          *
>          * @param bByte
>          * @return
>          */
>         @SuppressWarnings("unused")
>         private static String byteToNum(byte bByte) {
>             int iRet = bByte;
>             System.out.println("iRet1=" + iRet);
>             if (iRet < 0) {
>                 iRet += 256;
>             }
>             return String.valueOf(iRet);
>         }
>     
>         /**
>          * 转换字节数组为16进制字串
>          *
>          * @param bByte
>          * @return
>          */
>         private static String byteToString(byte[] bByte) {
>             StringBuffer sBuffer = new StringBuffer();
>             for (int i = 0; i < bByte.length; i++) {
>                 sBuffer.append(byteToArrayString(bByte[i]));
>             }
>             return sBuffer.toString();
>         }
>     
>         public static String GetMD5Code(String strObj) {
>             String resultString = null;
>             try {
>                 resultString = new String(strObj);
>                 MessageDigest md = MessageDigest.getInstance("MD5");
>                 // md.digest() 该函数返回值为存放哈希值结果的byte数组
>                 resultString = byteToString(md.digest(strObj.getBytes()));
>             } catch (NoSuchAlgorithmException ex) {
>                 ex.printStackTrace();
>             }
>             return resultString.toUpperCase();
>         }

2.用法

>     String pass = Md5Util.GetMD5Code(password);
> 
>