java 判断ip网段代码

 

package com.test;

public class IpTest {

	/**
	 * 判断IP是否在指定范围；
	 */
	boolean i;

	public static boolean ipIsValid(String ipSection, String ip) {
		if (ipSection == null)
			throw new NullPointerException("IP段不能为空！");
		if (ip == null)
			throw new NullPointerException("IP不能为空！");
		ipSection = ipSection.trim();
		ip = ip.trim();
		final String REGX_IP = "((25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]\\d|\\d)\\.){3}(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]\\d|\\d)";
		final String REGX_IPB = REGX_IP + "\\-" + REGX_IP;
		if (!ipSection.matches(REGX_IPB) || !ip.matches(REGX_IP))
			return false;
		int idx = ipSection.indexOf('-');
		String[] sips = ipSection.substring(0, idx).split("\\.");
		String[] sipe = ipSection.substring(idx + 1).split("\\.");
		String[] sipt = ip.split("\\.");
		long ips = 0L, ipe = 0L, ipt = 0L;
		for (int i = 0; i < 4; ++i) {
			ips = ips << 8 | Integer.parseInt(sips[i]);
			ipe = ipe << 8 | Integer.parseInt(sipe[i]);
			ipt = ipt << 8 | Integer.parseInt(sipt[i]);
		}
		if (ips > ipe) {
			long t = ips;
			ips = ipe;
			ipe = t;
		}
		return ips <= ipt && ipt <= ipe;
	}

	public static void main(String[] args) {
		if (ipIsValid("102.168.1.1-192.168.1.100", "192.168.1.54")) {
			System.out.println("ip属于该网段");
		} else
			System.out.println("ip不属于该网段");
	}

}