如何判断ip是否在规定的ip区间，方法是什么
导读：这篇文章分享给大家的内容是关于如何判断ip是否在规定的ip区间，方法是什么，本文介绍得很详细，内容很有参考价值，希望可以帮到有需要的小伙伴，接下来就让小编带领大家一起了解看看吧。 思路：利用ip和ip区间两端的值调用ipIs...
这篇文章分享给大家的内容是关于如何判断ip是否在规定的ip区间，方法是什么，本文介绍得很详细，内容很有参考价值，希望可以帮到有需要的小伙伴，接下来就让小编带领大家一起了解看看吧。
思路：
利用ip和ip区间两端的值调用ipIsValid方法。
工具类：
import org.apache.commons.lang.StringUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
public class IPUtil {
/**
* 获得当前ip
* @return
*/
public static String getIP(){
ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
if(servletRequestAttributes == null) {
return "127.0.0.1";
}
HttpServletRequest request = servletRequestAttributes.getRequest();
String ip = request.getHeader("x-forwarded-for");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
if ("0:0:0:0:0:0:0:1".equals(ip)) {
ip = "127.0.0.1";
}
return ip;
}
/**
* 判断IP是否在指定范围
* @param ipStart
* @param ipEnd
* @param ip
* @return
*/
public static boolean ipIsValid(String ipStart,String ipEnd, String ip) {
if (StringUtils.isEmpty(ipStart)) {
throw new NullPointerException("起始IP不能为空！");
}
if (StringUtils.isEmpty(ipEnd)) {
throw new NullPointerException("结束IP不能为空！");
}
if (StringUtils.isEmpty(ip)) {
throw new NullPointerException("IP不能为空！");
}
ipStart = ipStart.trim();
ipEnd = ipEnd.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 (!ipStart.matches(REGX_IP) || !ip.matches(REGX_IP) || !ipEnd.matches(REGX_IP)) {
return false;
}
String[] sips = ipStart.split("\\.");
String[] sipe = ipEnd.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;
}
}
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