用Java获取计算机名称 [英] Getting the computer name in Java

问题描述

我想知道是否有一种方法可以用Java获取计算机名称?我已经看到几个具有java.net.InetAddress功能的答案.但是我想知道是否存在不使用网络的方法?

I was wondering if there is a way to get the computer name in Java? I have seen several answers that feature java.net.InetAddress. However I was wondering if there is a way that does not use the network?

(作为一个附带的问题，计算机名称是否仍然只是一个网络事物，因此必须采用这种方式?)

(As a side question, is the computer name only a network thing anyway, so therefore has to be done this way??)

推荐答案

通过操作系统的基础DNS(域名系统)库从IP地址解析计算机名称".没有跨操作系统的计算机名称的通用概念，但DNS通常可用.如果尚未配置计算机名称，以便DNS可以解析它，则它不可用.

The computer "name" is resolved from the IP address by the underlying DNS (Domain Name System) library of the OS. There's no universal concept of a computer name across OSes, but DNS is generally available. If the computer name hasn't been configured so DNS can resolve it, it isn't available.

import java.net.InetAddress;
import java.net.UnknownHostException;

String hostname = "Unknown";

try
{
    InetAddress addr;
    addr = InetAddress.getLocalHost();
    hostname = addr.getHostName();
}
catch (UnknownHostException ex)
{
    System.out.println("Hostname can not be resolved");
}

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