MD5 加密类使用

/**
 * Created by Administrator on 2017/6/2 0002.
 */

import java.io.IOException;
import java.math.RoundingMode;
import java.security.MessageDigest;
import java.sql.Timestamp;
import java.text.DecimalFormat;


public class MD5 {
    private static final String[] hexDigits = new String[]{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};

    public MD5() {
    }

    public 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 (b < 0) {
            n = b + 256;
        }

        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin) {
        if (origin == null) {
            return null;
        } else {
            String resultString = "";

            try {
                resultString = new String(origin);
                MessageDigest ex = MessageDigest.getInstance("MD5");
                resultString = byteArrayToHexString(ex.digest(resultString.getBytes()));
            } catch (Exception var3) {
                System.out.println("MD5 encode error:" + var3.getMessage());
            }

            return resultString;
        }
    }

    public static String MD5Encode(byte[] b) {
        if (b == null) {
            return null;
        } else {
            String resultString = "";

            try {
                MessageDigest ex = MessageDigest.getInstance("MD5");
                resultString = byteArrayToHexString(ex.digest(b));
            } catch (Exception var3) {
                System.out.println("MD5 encode error:" + var3.getMessage());
            }

            return resultString;
        }
    }

    public static String MoEncode(float f, Timestamp time) {
        String ss = String.valueOf(f * (float) time.getMinutes() + (float) time.getSeconds());
        String en = MD5Encode(ss);
        return en;
    }