Long型转换成IP段String、StringIP段转换成Long型

     /** 把long类型的Ip转为一般Ip类型：xx.xx.xx.xx
       *
       * @param ip
       * @return */
      public static String getIpFromLong(Long ip) {
        String s1 = String.valueOf((ip & 4278190080L) / 16777216L);
        String s2 = String.valueOf((ip & 16711680L) / 65536L);
        String s3 = String.valueOf((ip & 65280L) / 256L);
        String s4 = String.valueOf(ip & 255L);
        return s1 + "." + s2 + "." + s3 + "." + s4;
      }

      /** 把xx.xx.xx.xx类型的转为long类型的
       *
       * @param ip
       * @return */
      public static Long getIpFromString(String ip) {
        Long ipLong = 0L;
        String ipTemp = ip;
        ipLong = ipLong * 256 + Long.parseLong(ipTemp.substring(0, ipTemp.indexOf(".")));
        ipTemp = ipTemp.substring(ipTemp.indexOf(".") + 1, ipTemp.length());
        ipLong = ipLong * 256 + Long.parseLong(ipTemp.substring(0, ipTemp.indexOf(".")));
        ipTemp = ipTemp.substring(ipTemp.indexOf(".") + 1, ipTemp.length());
        ipLong = ipLong * 256 + Long.parseLong(ipTemp.substring(0, ipTemp.indexOf(".")));
        ipTemp = ipTemp.substring(ipTemp.indexOf(".") + 1, ipTemp.length());
        ipLong = ipLong * 256 + Long.parseLong(ipTemp);
        return ipLong;
      }