四步，搞定一个短信验证码登录！

public class HttpUtil
{
   /**
    * 构造通用参数timestamp、sig和respDataType
    * 
    * @return
    */
   public static String createCommonParam()
   {
      // 时间戳
      SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
      String timestamp = sdf.format(new Date());
      // 签名
      String sig = DigestUtils.md5Hex(Config.ACCOUNT_SID + Config.AUTH_TOKEN + timestamp);
      return "&timestamp=" + timestamp + "&sig=" + sig + "&respDataType=" + Config.RESP_DATA_TYPE;
   }
   /**
    * post请求
    * 
    * @param url
    *            功能和操作
    * @param body
    *            要post的数据
    * @return
    * @throws IOException
    */
   public static String post(String url, String body)
   {
      System.out.println("url:" + System.lineSeparator() + url);
      System.out.println("body:" + System.lineSeparator() + body);
      String result = "";
      try
      {
         OutputStreamWriter out = null;
         BufferedReader in = null;
         URL realUrl = new URL(url);
         URLConnection conn = realUrl.openConnection();
         // 设置连接参数
         conn.setDoOutput(true);
         conn.setDoInput(true);
         conn.setConnectTimeout(5000);
         conn.setReadTimeout(20000);
         conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
         // 提交数据
         out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
         out.write(body);
         out.flush();
         // 读取返回数据
         in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
         String line = "";
         boolean firstLine = true; // 读第一行不加换行符
         while ((line = in.readLine()) != null)
         {
            if (firstLine)
            {
               firstLine = false;
            } else
            {
               result += System.lineSeparator();
            }
            result += line;
         }
      } catch (Exception e)
      {
         e.printStackTrace();
      }
      return result;
   }
   /**
    * 回调测试工具方法
    * 
    * @param url
    * @param reqStr
    * @return
    */
   public static String postHuiDiao(String url, String body)
   {
      String result = "";
      try
      {
         OutputStreamWriter out = null;
         BufferedReader in = null;
         URL realUrl = new URL(url);
         URLConnection conn = realUrl.openConnection();
         // 设置连接参数
         conn.setDoOutput(true);
         conn.setDoInput(true);
         conn.setConnectTimeout(5000);
         conn.setReadTimeout(20000);
         // 提交数据
         out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
         out.write(body);
         out.flush();
         // 读取返回数据
         in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
         String line = "";
         boolean firstLine = true; // 读第一行不加换行符
         while ((line = in.readLine()) != null)
         {
            if (firstLine)
            {
               firstLine = false;
            } else
            {
               result += System.lineSeparator();
            }
            result += line;
         }
      } catch (Exception e)
      {
         e.printStackTrace();
      }
      return result;
   }
}

public class IndustrySMS
{
   private static String operation = "/industrySMS/sendSMS";
   private static String accountSid = Config.ACCOUNT_SID;
   private static String to = "15342349382";
   private static String smsContent = "【小陶科技】登录验证码：{"+runNumber().toString()+"}，如非本人操作，请忽略此短信。";
   /**
    * 验证码通知短信
    */
   public static void execute()
   {
      String tmpSmsContent = null;
       try{
         tmpSmsContent = URLEncoder.encode(smsContent, "UTF-8");
       }catch(Exception e){
       }
       String url = Config.BASE_URL + operation;
       String body = "accountSid=" + accountSid + "&to=" + to + "&smsContent=" + tmpSmsContent
           + HttpUtil.createCommonParam();
       // 提交请求
       String result = HttpUtil.post(url, body);
       System.out.println("result:" + System.lineSeparator() + result);
   }