如何从Java中的域名获取IP地址？

Question

I am writing an application where I need the IP address. I have a domain name and I would like to know how to get the IP address from it. For example, "www.girionjava.com". How could I get the IP address of this website by programming in Java? Thanks.

Answer 1

InetAddress giriAddress = java.net.InetAddress.getByName("www.girionjava.com");

然后，如果您想将IP作为字符串

String address = giriAddress.getHostAddress();

Answer 2

This should be simple.

InetAddress[] machines = InetAddress.getAllByName("yahoo.com");
for(InetAddress address : machines){
  System.out.println(address.getHostAddress());
}

Answer 3

InetAddress.getByName("www.girionjava.com")

Answer 4

(Extra mask in printing sine java considers all integers to be signed, but an IP address is unsigned)

InetAddress[] machines = InetAddress.getAllByName("yahoo.com");
for(InetAddress address : machines){
  byte[] ip = address.getAddress();
  for(byte b : ip){
    System.out.print(Integer.toString(((int)b)&0xFF)+".");
  }
  System.out.println();
}

Answer 5

The .netAddress class in java.net has some static methods to do this.

        InetAddress a = InetAddress.getByName ("www.girionjava.com");
        System.out.println(a.getHostAddress());     

This is very basic stuff, for more complete control over DNS queries, you will have to use additional libraries.