我可以使用哪个库来检查IP地址是否在给定的子网中?我可以找到像Apache Commons SubnetUtils(SubnetUtils.SubnetInfo.isInRange)这样的库,但是很多都不支持IPv6。
答案 0 :(得分:8)
edazdarevic's CIDRUtils支持IPv4和IPv6。该示例未提及boolean isInRange(String ipAddress),但它已实现!
另一个选项是java-ipv6,但它不支持IPv4和requires JDK7。
答案 1 :(得分:5)
使用spring-security-web
' s IpAddressMatcher。与Apache Commons Net不同,它支持ipv4和ipv6。
import org.springframework.security.web.util.matcher.IpAddressMatcher;
...
private void checkIpMatch() {
matches("192.168.2.1", "192.168.2.1"); // true
matches("192.168.2.1", "192.168.2.0/32"); // false
matches("192.168.2.5", "192.168.2.0/24"); // true
matches("92.168.2.1", "fe80:0:0:0:0:0:c0a8:1/120"); // false
matches("fe80:0:0:0:0:0:c0a8:11", "fe80:0:0:0:0:0:c0a8:1/120"); // true
matches("fe80:0:0:0:0:0:c0a8:11", "fe80:0:0:0:0:0:c0a8:1/128"); // false
matches("fe80:0:0:0:0:0:c0a8:11", "192.168.2.0/32"); // false
}
private boolean matches(String ip, String subnet) {
IpAddressMatcher ipAddressMatcher = new IpAddressMatcher(subnet);
return ipAddressMatcher.matches(ip);
}
如果您不愿意在项目中加入Spring,请查看我的其他答案,here。
答案 2 :(得分:1)
The IPAddress Java library以多态方式支持IPv4和IPv6,并支持子网,包括检查包含子网中地址或子网包含的方法。链接中提供了javadoc。免责声明:我是该图书馆的项目经理。
示例代码:
contains("10.10.20.0/30", "10.10.20.3");
contains("10.10.20.0/30", "10.10.20.5");
contains("1::/64", "1::1");
contains("1::/64", "2::1");
contains("1::3-4:5-6", "1::4:5");
contains("1-2::/64", "2::");
contains("bla", "foo");
static void contains(String network, String address) {
IPAddressString one = new IPAddressString(network);
IPAddressString two = new IPAddressString(address);
System.out.println(one + " contains " + two + " " + one.contains(two));
}
输出:
10.10.20.0/30 contains 10.10.20.3 true
10.10.20.0/30 contains 10.10.20.5 false
1::/64 contains 1::1 true
1::/64 contains 2::1 false
1::3-4:5-6 contains 1::4:5 true
1-2::/64 contains 2:: true
bla contains foo false