/**
   * achieve the num of people him/her fellowed
   *
   * @param doc
   * @return
   */
  private String getFellowPeopleNum(Document doc) {
    Elements friendHtml = doc.select("div[id=\"friend\"]");
    Elements fellowPeopleNumHtml = null;

    if (friendHtml != null) {
      fellowPeopleNumHtml = friendHtml.select("a");
      // 关注人数
      if (fellowPeopleNumHtml != null) {
        String fellowPeopleNum =
            UtilsMethod.findFirstStringByRegex("成员[0-9]+", fellowPeopleNumHtml.text());
        if (fellowPeopleNum != null) {
          fellowPeopleNum = fellowPeopleNum.replaceAll("[\\D]+", "");
          if (fellowPeopleNum != null) {
            return fellowPeopleNum;
          } else {
            return null;
          }
        } else {
          return null;
        }
      } else {
        return null;
      }
    } else {
      return null;
    }
  }
 /**
  * achieve the person join douban date
  *
  * @param doc
  * @return
  */
 private String getJoinDate(Document doc) {
   Elements joinDateHtml = doc.select("div[class=\"user-info\"] div[class=\"pl\"]");
   if (joinDateHtml != null) {
     return UtilsMethod.findFirstStringByRegex(
         "[0-9]{4}\\-[0-9]{2}\\-[0-9]{2}", joinDateHtml.text());
   } else {
     return null;
   }
 }
 /**
  * achieve the num of people fellow him/her
  *
  * @param doc
  * @return
  */
 private String getFellowedPeopleNum(Document doc) {
   Elements friendHtml = doc.select("p[class=\"rev-link\"]");
   if (friendHtml != null) {
     String fellowedPeopleNum =
         UtilsMethod.findFirstStringByRegex("被[0-9]+人关注", friendHtml.text());
     if (fellowedPeopleNum != null) {
       fellowedPeopleNum = fellowedPeopleNum.replaceAll("[\\D]+", "");
       if (fellowedPeopleNum != null) {
         return fellowedPeopleNum;
       } else {
         return null;
       }
     } else {
       return null;
     }
   } else {
     return null;
   }
 }