狼翔天地

public class MD5Util {

    public static String getMD5(String str) {
        try
        {
            // Create MD5 Hash
            MessageDigest md5 = java.security.MessageDigest.getInstance("MD5");
            md5.update(str.getBytes());
            byte messageDigest[] = md5.digest();

            String resultArray = byteArrayToHex(messageDigest);

            return resultArray;
        }
        catch (NoSuchAlgorithmException e)
        {
            e.printStackTrace();
        }
        return "";
    }

    public static String byteArrayToHex(byte[] byteArray) {
        char[] hexDigits = {'0','1','2','3','4','5','6','7','8','9', 'A','B','C','D','E','F' };
        char[] resultCharArray =new char[byteArray.length * 2];
        int index = 0;
        for (byte b : byteArray) {
            resultCharArray[index++] = hexDigits[b>>>4 & 0xf];
            resultCharArray[index++] = hexDigits[b & 0xf];
        }
        return new String(resultCharArray);
    }
}