java如何判断IP是内网还是外网 java判断ip段

Java判断IP是否在指定网段中，看代码

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1. /**
2.      * 判断ip是否在指定网段中
3.      * @author dh
4.      * @param iparea
5.      * @param ip
6.      * @return boolean
7.      */  
8. public static boolean ipIsInNet(String iparea, String ip) {  
9. if (iparea == null)  
10. throw new NullPointerException("IP段不能为空！");  
11. if (ip == null)  
12. throw new NullPointerException("IP不能为空！");  
13.         iparea = iparea.trim();  
14.         ip = ip.trim();  
15. 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)";  
16. final String REGX_IPB = REGX_IP + "//-" + REGX_IP;  
17. if (!iparea.matches(REGX_IPB) || !ip.matches(REGX_IP))  
18. return false;  
19. int idx = iparea.indexOf('-');  
20. 0, idx).split("//.");  
21. 1).split("//.");  
22. "//.");  
23. long ips = 0L, ipe = 0L, ipt = 0L;  
24. for (int i = 0; i < 4; ++i) {  
25. 8 | Integer.parseInt(sips[i]);  
26. 8 | Integer.parseInt(sipe[i]);  
27. 8 | Integer.parseInt(sipt[i]);  
28.         }  
29. if (ips > ipe) {  
30. long t = ips;  
31.             ips = ipe;  
32.             ipe = t;  
33.         }  
34. return ips <= ipt && ipt <= ipe;  
35.     }  
 
1. public class IpTest {  
2. public static void main(String[] args) {  
3. "192.168.1.127", "192.168.1.64/26"));  
4. "192.168.1.2", "192.168.0.0/23"));  
5. "192.168.0.1", "192.168.0.0/24"));  
6. "192.168.0.0", "192.168.0.0/32"));  
7.     }  
8. public static boolean isInRange(String ip, String cidr) {  
9. "\\.");  
10. int ipAddr = (Integer.parseInt(ips[0]) << 24)  
11. 1]) << 16)  
12. 2]) << 8) | Integer.parseInt(ips[3]);  
13. int type = Integer.parseInt(cidr.replaceAll(".*/", ""));  
14. int mask = 0xFFFFFFFF << (32 - type);  
15. "/.*", "");  
16. "\\.");  
17. int cidrIpAddr = (Integer.parseInt(cidrIps[0]) << 24)  
18. 1]) << 16)  
19. 2]) << 8)  
20. 3]);  
21.   
22. return (ipAddr & mask) == (cidrIpAddr & mask);  
23.     }  
24. }