import java.net.InetAddress;
import java.net.UnknownHostException;
/**
获取IP地址和域名
*/
public class GetIPAddress{
//通过InetAddress静态方法获取本机网络地址信息,在通过InetAddress实例方法获取本机网路IP信息
//host包括hostname/hostaddress
public String getLocalIP()
throws UnknownHostException{
System.out.println("InetAddress-localhost: "+
InetAddress.getLocalHost().toString());
System.out.println("getLocalIP: "+
InetAddress.getLocalHost().getHostAddress());
return InetAddress.getLocalHost().getHostAddress();
}
//通过InetAddress实例方法获取本机的域名或者主机名
public String getHostName()
throws UnknownHostException{
System.out.println("getHostName: "+
InetAddress.getLocalHost().getHostName());
return InetAddress.getLocalHost().getHostName();
}
//通过InetAddress静态方法通过域名获取网络信息(InetAddress)
//getHostAddress()和getHostAddress()是相对的，如果没有指定参数则是相对于本机，如果指定参数就是相对于指定的参数
public String getIPByName(String str)
throws UnknownHostException{
System.out.println("域名为"+str+"的IP： "+
InetAddress.getByName(str).getHostAddress());
return InetAddress.getByName(str).getHostAddress();
}
//通过InetAddress静态方法通过域名获取多IP本机网络信息(InetAddress)
public String[] getAllIPByName(String str)
throws UnknownHostException{
System.out.println("域名为"+str+"的所有IP： "
);
int numIP =
InetAddress.getAllByName(str).length;
InetAddress[] inetAddress =
InetAddress.getAllByName(str);
String[] IPs =
new String[numIP];
for(
int i=0;i<numIP;i++
){
String temp =
inetAddress[i].getHostAddress();
IPs[i] =
temp;
System.out.println("IP["+i+"]： "+
temp);
}
return IPs;
}
public static void main(String[] args)
throws UnknownHostException{
GetIPAddress getIP =
new GetIPAddress();
getIP.getLocalIP();
System.out.println("======================================================"
);
getIP.getHostName();
System.out.println("======================================================"
);
getIP.getIPByName("www.google.cn"
);
System.out.println("======================================================"
);
getIP.getAllIPByName("www.google.cn"
);
}
}
编译执行结果：
G:\maul keyboard\network programming>
javac GetIPAddress.java
G:\maul keyboard\network programming>
java GetIPAddress
InetAddress-localhost: MS-20160816QAVW/10.0.216.208
getLocalIP: 10.0.216.208
======================================================
getHostName: MS-
20160816QAVW
======================================================
域名为www.google.cn的IP： 203.208.40.127
======================================================
域名为www.google.cn的所有IP：
IP[0]： 203.208.40.127
IP[1]： 203.208.40.120
IP[2]： 203.208.40.111
IP[3]： 203.208.40.119
G:\maul keyboard\network programming>
转载于:https://www.cnblogs.com/celine/p/9940067.html
