2月8

Java判断用户ip是否在指定IP段范围内

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10:00编程杂谈  From: 本站原创
  /*验证IP是否属于某个IP段
   *
   * ipSection    IP段(以'-'分隔)
   * ip           所验证的IP号码
   *
   */
  public static boolean ipExistsInRange(String ip, String ipSection) {
    ipSection = ipSection.trim();
    ip = ip.trim();
    int idx = ipSection.indexOf('-');
    String beginIP = ipSection.substring(0, idx);
    String endIP = ipSection.substring(idx + 1);
    return getIp2long(beginIP) <= getIp2long(ip) && getIp2long(ip) <= getIp2long(endIP);
  }

  public static long getIp2long(String ip) {
    ip = ip.trim();
    String[] ips = ip.split("\\.");
    long ip2long = 0L;
    for (int i = 0; i < 4; ++i) {
      ip2long = ip2long << 8 | Integer.parseInt(ips[i]);
    }

    return ip2long;
  }

  public static long getIp2long2(String ip) {
    ip = ip.trim();
    String[] ips = ip.split("\\.");
    long ip1 = Integer.parseInt(ips[0]);
    long ip2 = Integer.parseInt(ips[1]);
    long ip3 = Integer.parseInt(ips[2]);
    long ip4 = Integer.parseInt(ips[3]);
    long ip2long = 1L * ip1 * 256 * 256 * 256 + ip2 * 256 * 256 + ip3 * 256 + ip4;

    return ip2long;
  }

  public static boolean isIntranetIP(String ip) {
  ipExistsInRange(ip, "172.16.0.0-172.31.255.255") || ip.startsWith("10.");
        //10.10.10.116 是否属于固定格式的IP段10.10.1.00-10.10.255.255

        String ip="10.10.10.116";

        String ipSection="10.10.1.00-10.10.255.255";

        boolean exists=ipExistsInRange(ip,ipSection);

        System.out.println(exists);

        System.out.println(getIp2long(ip));

        System.out.println(getIp2long2(ip));
  }

来源:Heck's Blog
地址:https://www.heckjj.com/post/534/
转载时须以链接形式注明作者和原始出处及本声明,否则将追究法律责任,谢谢配合!
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