java 限定网站在指定IP段访问

package com.datongsoft.wg.common.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

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 int getExists(String ip){
	    	System.out.println("访问Ip："+ip);
	    	InetAddress addr;
	    	int ext=0;
	    	 boolean exists = false;
	    	try {
				addr = InetAddress.getLocalHost();
				// String ip=addr.getHostAddress().toString(); //获取本机ip 
		    	 //String ipSection="10.163.64.00-10.163.71.255";
				 String ipSection="192.168.0.1-192.168.0.240";
		    	 exists =ipExistsInRange(ip,ipSection);
		    	 if(exists){
		    		 ext=1; 
		    	 }
		    	 
			} catch (UnknownHostException e) {
				e.printStackTrace();
			}  catch (Exception e) {
				e.printStackTrace();
			}  
			return ext;
	    }
	    public static void main(String[] args) throws Exception{

	       //10.10.10.116 是否属于固定格式的IP段10.10.1.00-10.10.255.255
	    /*	InetAddress addr = InetAddress.getLocalHost();   
	        String ip=addr.getHostAddress().toString(); //获取本机ip   
	        String hostName=addr.getHostName().toString(); //获取本机计算机名称 
	        //String ip="10.163.10.116";

	        String ipSection="10.163.64.00-10.163.71.255";

	       boolean exists=ipExistsInRange(ip,ipSection);

	        System.out.println(exists);*/
	    	//System.out.println( getExists());
	        //System.out.println(getIp2long(ip));
	        //System.out.println(getIp2long2(ip));

	    }
	 

	}