Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

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

    public static String md5Three(String clientId, String pwd, String timestamp) {
        clientId = clientId == null ? "" : clientId;
        pwd = pwd == null ? "" : pwd;
        timestamp = timestamp == null ? "" : timestamp;
        while (timestamp.length() < 10) {
            timestamp = "0" + timestamp;
        }
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e.getMessage());
        }
        md.update(clientId.getBytes());
        md.update(new byte[7]);
        md.update(pwd.getBytes());
        md.update(timestamp.getBytes());

        return byteArrayToHexString(md.digest());
    }

    public static String byteArrayToHexString(byte[] b) {
        String result = "";
        for (int i = 0; i < b.length; i++) {
            result = result + byteToHexString(b[i]);
        }
        return result;
    }

    public static String byteToHexString(byte b) {
        int n = b;
        if (n < 0) {
            n = 256 + n;
        }
        int d1 = n / 16;
        int d2 = n % 16;
        return HexCode[d1] + HexCode[d2];
    }
}