验证IP是否属于某个IP段

package com.boco.iam.test;

/**
 * @author boco
 * 判断ip是否属于某个区间，例如
 * 10.10.10.116 是否属于固定格式的IP段10.10.1.00-10.10.255.255
 */
public class IpUtil {
	/*
	 * 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 void main(String[] args) {
		String ip = "10.181.211.132";
		String ipSection = "10.181.203.0-10.181.217.255";
		boolean exists = ipExistsInRange(ip, ipSection);
		System.out.println(exists);
		System.out.println(getIp2long(ip));
		System.out.println(getIp2long2(ip));
	}

	/**判断ip是否属于某个区间，例如
	 * 10.10.10.116 是否属于固定格式的IP段10.10.1.00-10.10.255.255
	 * @param ip
	 * @param ipSection
	 * @return
	 */
	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);
	}
	/**ip地址转换成长整型方法1
	 * @param ip
	 * @return
	 */
	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;
	}

	/**ip地址转换成长整型方法2
	 * @param ip
	 * @return
	 */
	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;
	}
}