ip2Long2

package com;

public class T {
	/**
	 * long 转 ip
	 * 
	 * @param ip
	 * @return
	 */
	public static String long2ip(long ip) {
		long mask = 0xFF;
		long ip1 = ip & mask;// 0~7
		long ip2 = (ip >> 8) & mask;// 8~15
		long ip3 = (ip >> 16) & mask;// 16~23
		long ip4 = (ip >> 24) & mask;// 24~31
		String ips = new StringBuffer().append(ip4).append(".").append(ip3).append(".").append(ip2).append(".").append(ip1).toString();
		return ips;
	}

	/**
	 * ip转long
	 * 
	 * @param ip
	 * @return
	 */
	public static long ip2Long(String ip) {
		String[] ipAdress = ip.split("\\.");
		long ipLong = 16777216L * Long.parseLong(ipAdress[0]) + 65536 * Integer.parseInt(ipAdress[1]) + 256 * Integer.parseInt(ipAdress[2]) + Integer.parseInt(ipAdress[3]);
		return ipLong;
	}

}