1、java 怎麼根據IP地址獲取主機名
//看看這個代碼如何。
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Properties;
import java.util.Set;
public class TestSystemProperties {
public static void main(String [] args){
InetAddress netAddress = getInetAddress();
System.out.println("host ip:" + getHostIp(netAddress));
System.out.println("host name:" + getHostName(netAddress));
Properties properties = System.getProperties();
Set<String> set = properties.stringPropertyNames(); //獲取java虛擬機和系統的信息。
for(String name : set){
System.out.println(name + ":" + properties.getProperty(name));
}
}
public static InetAddress getInetAddress(){
try{
return InetAddress.getLocalHost();
}catch(UnknownHostException e){
System.out.println("unknown host!");
}
return null;
}
public static String getHostIp(InetAddress netAddress){
if(null == netAddress){
return null;
}
String ip = netAddress.getHostAddress(); //get the ip address
return ip;
}
public static String getHostName(InetAddress netAddress){
if(null == netAddress){
return null;
}
String name = netAddress.getHostName(); //get the host address
return name;
}
}
這個代碼簡單明了,就是調用現成的InetAddress類