需要在java中执行特定IP地址的反向DNS查找 [英] Need to perform a reverse DNS lookup of a particular IP address in java

问题描述

我需要获取DNS地址，例如http://stackoverflow.com/questions/ask。我使用以下代码，并能以192.X.X.X的形式获取。

I need to get the DNS address, for example "http://stackoverflow.com/questions/ask". I used the following code and able to get in the form of 192.X.X.X.

  Hashtable env = new Hashtable();
  env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.dns.DnsContextFactory");
  DirContext ictx = new InitialDirContext(env);
  String dnsServers = (String) ictx.getEnvironment().get("java.naming.provider.url");

  System.out.println("DNS Servers: " + dnsServers ); 

推荐答案

InetAddress ia = InetAddress.getByAddress(new byte[] {74,125,127,106});
// or 
ia = InetAddress.getByName("74.125.127.106");
System.out.println(ia.getCanonicalHostName());

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