package test;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import inet.ipaddr.IPAddress;
import inet.ipaddr.IPAddressString;
import inet.ipaddr.ipv4.IPv4Address;
public class TestIpAddr {
public static void main(String[] args) {
//ip转bigint
IPAddress address = new IPAddressString("192.168.1.1").getAddress() ;
System.out.println( address.getValue() );
// bigint转ip
System.out.println(String.join(".",new IPv4Address(toByteArray(3232235777L)).getSegmentStrings()));
//获取子网
List<String> subnetList = getSubnetList("192.168.1.1/255.255.252.0");
for(int i=0;i<subnetList.size() ; i++ ) {
System.out.println(subnetList.get(i) );
}
}
private static byte[] toByteArray(Long a){
ByteArrayOutputStream bos=new ByteArrayOutputStream();
DataOutputStream dos=new DataOutputStream(bos);
try {
dos.writeLong(a);
} catch (IOException e) {
e.printStackTrace();
}
return bos.toByteArray();
}
public static List <String> getSubnetList (String ipAddr){
IPAddress address = new IPAddressString(ipAddr).getAddress();
int prefixLength=address.toAddressString().getNetworkPrefixLength();
List<String> subnetList = new ArrayList<String>();
IPAddress subnet = address.applyPrefixLength(prefixLength).toPrefixBlock();
Iterator<? extends IPAddress> iterator = subnet.iterator();
while (iterator.hasNext()) {
subnetList.add(iterator.next().toCanonicalWildcardString());
}
subnetList.remove(0);
subnetList.remove(subnetList.size()-1);
return subnetList;
}
}
jar包下载地址:
https://www.mvnjar.com/com.github.seancfoley/ipaddress/5.0.2/detail.html
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