Shop/src/com/tenpay/util/MD5Util.java

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package com.tenpay.util;

import java.security.MessageDigest;

public class MD5Util
{

    private static final String hexDigits[] = {
        "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", 
        "a", "b", "c", "d", "e", "f"
    };

    public MD5Util()
    {
    }

    private static String byteArrayToHexString(byte b[])
    {
        StringBuffer resultSb = new StringBuffer();
        for(int i = 0; i < b.length; i++)
        {
            resultSb.append(byteToHexString(b[i]));
        }

        return resultSb.toString();
    }

    private static String byteToHexString(byte b)
    {
        int n = b;
        if(n < 0)
        {
            n += 256;
        }
        int d1 = n / 16;
        int d2 = n % 16;
        return (new StringBuilder(String.valueOf(hexDigits[d1]))).append(hexDigits[d2]).toString();
    }

    public static String MD5Encode(String origin)
    {
        String resultString = null;
        try
        {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
        }
        catch(Exception exception) { }
        return resultString;
    }

}