Merge pull request #490 from blacklit/dev

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *    http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package cn.escheduler.common.utils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * http utils

 */

public class IpUtils {

  private static final Logger logger = LoggerFactory.getLogger(IpUtils.class);

  public static final String DOT = ".";

  /**

   * ip str to long <p>

   *

   * @param ipStr ip string

   */

  public static Long ipToLong(String ipStr) {

    String[] ipSet = ipStr.split("\\" + DOT);

    return Long.parseLong(ipSet[0]) << 24 | Long.parseLong(ipSet[1]) << 16 | Long.parseLong(ipSet[2]) << 8 | Long.parseLong(ipSet[3]);

  }

  /**

   * long to ip

   * @param ipLong the long number converted from IP

   * @return String

   */

  public static String longToIp(long ipLong) {

    long[] ipNumbers = new long[4];

    long tmp = 0xFF;

    ipNumbers[0] = ipLong >> 24 & tmp;

    ipNumbers[1] = ipLong >> 16 & tmp;

    ipNumbers[2] = ipLong >> 8 & tmp;

    ipNumbers[3] = ipLong & tmp;

    StringBuilder sb = new StringBuilder(16);

    sb.append(ipNumbers[0]).append(DOT)

            .append(ipNumbers[1]).append(DOT)

            .append(ipNumbers[2]).append(DOT)

            .append(ipNumbers[3]);

    return sb.toString();

  }

  public static void main(String[] args){

    long ipLong = ipToLong("11.3.4.5");

    logger.info(longToIp(ipLong));

  }

}