package com.infynova.udi.common.utils;


import java.security.MessageDigest;

/**
 * MD5工具类
 */
public class MD5Util {

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

    /**
     * 将字节数组转换成为16进制的字符串
     */
    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();
    }

    /**
     * 返回形式为数字和字符串
     */
    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    /**
     * 获取MD5的值
     */
    public static String getMD5(String origin) {
        return encode(origin, "UTF-8");
    }

    public static String encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    public static void main(String[] args) {
        Long l = System.currentTimeMillis();
        System.out.println(l);

        String signString = l.toString() + "j6ZACIDd" + "9aae7756510d70fd7e420f5391950f01b7a744ed";
        String signature = MD5Util.getMD5(signString);
        System.out.println(signature);


//        token + timestamp + nonce
//       String data= "12345678954556"+"8882872e-cc12-4e51-8f6a-591bbf423feb" + "1658909039296" +"112";
//        String datas = MD5Util.getMD5(data);
//        System.out.println(datas);

    }
}