java语言例子

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.security.Key;
import java.security.MessageDigest;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class DessMonitorOpenApi
{
    /** dessmonitor开放平台API访问地址. */
    private static String OPEN_API_URI = "http://api.dessmonitor.com/public/";

    public static final void main(String[] args)
    {
        DessMonitorOpenApi.reg();
        DessMonitorOpenApi.authSource();
        DessMonitorOpenApi.authSourcePassed();
    }

    /** 认证接口. */
    private static final void authSource()
    {
        String usr = "vplant"; /* 平台分配的账号, 密码, 厂家标识. */
        String pwd = "vplant";
        String companyKey = "0123456789ABCDEF";
        String salt = System.currentTimeMillis() + ""; /* 盐值. */
        String sha1Pwd = DessMonitorOpenApi.sha1ToLowerCase(pwd.getBytes()); /* SHA-1(pwd). */
        String action = "&action=authSource&usr=" + usr /* 注意: 中文需URLEncoder.encode. */ + "&company-key=" + companyKey;
        String sign = DessMonitorOpenApi.sha1ToLowerCase((salt + sha1Pwd + action).getBytes()); /* SHA-1(slat + SHA-1(pwd) + action). */
        String request = DessMonitorOpenApi.OPEN_API_URI + "?sign=" + sign + "&salt=" + salt + action;
        System.out.println(request);
    }

    /** 注册电站业主账号接口. */
    private static final void reg()
    {
        String usr = "plant-user-01";
        String pwd = "plant-user-01";
        String mobile = "15889700000";
        String email = "eybond@eybond.com";
        String pn = "0123456789ABCD";
        String sn = pn;
        String companyKey = "0123456789ABCDEF";
        String salt = System.currentTimeMillis() + ""; /* 盐值. */
        String pwdSha1 = DessMonitorOpenApi.sha1ToLowerCase(pwd.getBytes()); /* SHA-1(PWD). */
        String pnSha1 = DessMonitorOpenApi.sha1ToLowerCase(pn.getBytes()); /* SHA-1(PN). */
        byte[] rc4 = DessMonitorOpenApi.rc4enc(pnSha1.getBytes(), pwdSha1.getBytes(), 0, pwdSha1.getBytes().length); /* RC4(SHA-1(PN), SHA-1(PWD)). */
        String action = "&action=reg&usr=" + usr /* 注意: 中文需URLEncoder.encode. */ + "&pwd=" + DessMonitorOpenApi.byte2HexStr(rc4, 0, rc4.length).toLowerCase();
        action += "&mobile=" + mobile + "&email=" + email + "&sn=" + sn + "&company-key=" + companyKey;
        String sign = DessMonitorOpenApi.sha1ToLowerCase((salt + pwdSha1 + action).getBytes());
        String request = DessMonitorOpenApi.OPEN_API_URI + "?sign=" + sign + "&salt=" + salt + action;
        System.out.println(request);
    }

    /** 认证通过后的业务API接口. */
    private static final void authSourcePassed()
    {
        String secret = "ffa1655ee3726840822063a02ac5017795809b18"; /* 认证通过后的secret与token. */
        String token = "88d22d819e31897eea2d9d5b9f7792cf4065ac5372aad3672f5e4e147cd25b5f";
        String salt = System.currentTimeMillis() + ""; /* 盐值. */
        String action = "&action=queryCollectorInfo&pn=G0916522248153";
        String sign = DessMonitorOpenApi.sha1ToLowerCase((salt + secret + token + action).getBytes()); /* SHA-1(slat + secret + token + action). */
        String request = DessMonitorOpenApi.OPEN_API_URI + "?sign=" + sign + "&salt=" + salt + "&token=" + token + action;
        System.out.println(request);
    }

    /** 将字节流转换成十六进制字符串(紧凑格式, 无空格). */
    private static final String byte2HexStr(byte by[], int ofst, int len)
    {
        if (len < 1)
            return "";
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        PrintStream ps = new PrintStream(bos);
        for (int i = ofst; i < ofst + len; i++)
            ps.printf("%02X", by[i]);
        return bos.toString();
    }

    /** SHA-1摘要算法. */
    private static final String sha1ToLowerCase(byte[] by)
    {
        try
        {
            byte dat[] = MessageDigest.getInstance("SHA-1").digest(by);
            return DessMonitorOpenApi.byte2HexStr(dat, 0, dat.length).toLowerCase();
        } catch (Exception e)
        {
            e.printStackTrace();
            return null;
        }
    }

    /** RC4加密. */
    public static final byte[] rc4enc(byte key[], byte[] org, int ofst, int len)
    {
        try
        {
            Key k = new SecretKeySpec(key, "RC4");
            Cipher cip = Cipher.getInstance("RC4");
            cip.init(Cipher.ENCRYPT_MODE, k);
            return cip.doFinal(org, ofst, len);
        } catch (Exception e)
        {
            e.printStackTrace();
            return null;
        }
    }
}