Java判断用户ip是否在指定IP段范围内

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 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 void main(String[] args){

//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));

}

}