加密用户密码

Java代码:

public static String encryptPassword(String userName, String password)  

{  

    try 

    {  

        String key1 = "1jjejduuhjdjdHDUEHWHd3ehgfidhwh23hHJCRIOI4HDHDHFKHFD3dhdhrg2djsHSDFHFEDJGW";  

        String key2 = "r347djejDETahe3j%3jd*%%2DDE223fdhahfh%^@21hdhfhzhdDFQ3hH7eh32hdE#@sdqhqhde";  

        String key3 = "gwkjd@wjsdj2324shjsQWeh2dsGed/#21ssdEdhawehrcyzhzeje2#@SDajw2D2sjzahd3#dSa";  

        String str = key1 + userName + key2 + password + key3;  

        MessageDigest alg = MessageDigest.getInstance("MD5");  

        byte[] b = str.getBytes();  

        alg.reset();  

        alg.update(b);  

        byte[] hash = alg.digest();  

        String d = "";  

        for (int i = 0; i < hash.length; i++)  

        {  

            int v = hash[i] & 0xFF;  

            if (v < 16)  

            {  

                d += "0";  

            }  

            d += Integer.toString(v, 16).toUpperCase();  

        }  

        return d;  

    }  

    catch (NoSuchAlgorithmException e)  

    {  

        return null;  

    }  

}