主流有几种方法，一种是用下面的函数

一种是用命令行来获取

import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.InetAddress;import java.net.NetworkInterface;import java.util.ArrayList;import java.util.Formatter;import java.util.List;import java.util.Locale;import java.util.Map;import java.util.Properties;public class test {    //通过截取cmd流方式得到计算机的配置信息(不好)    public static List
    
      getIpAddress() {        Process p = null;        List
     
       address = new ArrayList
      
       ();        try {            p = new ProcessBuilder("ipconfig", "/all").start();        } catch (Exception e) {            return address;        }        StringBuffer sb = new StringBuffer();        //读取进程输出值        InputStream inputStream = p.getInputStream();        BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));        String s = "";        try {            while ((s = br.readLine()) != null) {                sb.append(s + "\n");            }        } catch (Exception e) {            e.printStackTrace();        } finally {            try {                inputStream.close();            } catch (Exception e) {                e.printStackTrace();            }        }        System.out.println(sb);        return address;    }    public static void getIpconfig() {        Map
       
         map = System.getenv();        System.out.println(map.get("USERNAME"));//获取用户名        System.out.println(map.get("COMPUTERNAME"));//获取计算机名        System.out.println(map.get("USERDOMAIN"));//获取计算机域名    }    //得到计算机的ip地址和mac地址    public static void getConfig() {        try {            InetAddress address = InetAddress.getLocalHost();            NetworkInterface ni = NetworkInterface.getByInetAddress(address);            //ni.getInetAddresses().nextElement().getAddress();            byte[] mac = ni.getHardwareAddress();            String sIP = address.getHostAddress();            String sMAC = "";            Formatter formatter = new Formatter();            for (int i = 0; i < mac.length; i++) {                sMAC = formatter.format(Locale.getDefault(), "%02X%s", mac[i],                        (i < mac.length - 1) ? "-" : "").toString();            }            System.out.println("IP：" + sIP);            System.out.println("MAC：" + sMAC);        } catch (Exception e) {            e.printStackTrace();        }    }    //得到计算机的ip,名称,操作系统名称,操作系统版本    public static void Config() {        try {            InetAddress addr = InetAddress.getLocalHost();            String ip = addr.getHostAddress().toString(); //获取本机ip            String hostName = addr.getHostName().toString(); //获取本机计算机名称            System.out.println("本机IP：" + ip + "\n本机名称:" + hostName);            Properties props = System.getProperties();            System.out.println("操作系统的名称：" + props.getProperty("os.name"));            System.out.println("操作系统的版本：" + props.getProperty("os.version"));        } catch (Exception e) {            e.printStackTrace();        }    }    //其它的一些东西,会有用到的时候的    public static void all() {        Properties props = System.getProperties();        System.out.println("Java的运行环境版本：" + props.getProperty("java.version"));        System.out.println("Java的运行环境供应商：" + props.getProperty("java.vendor"));        System.out.println("Java供应商的URL：" + props.getProperty("java.vendor.url"));        System.out.println("Java的安装路径：" + props.getProperty("java.home"));        System.out.println("Java的虚拟机规范版本：" + props.getProperty("java.vm.specification.version"));        System.out.println("Java的虚拟机规范供应商：" + props.getProperty("java.vm.specification.vendor"));        System.out.println("Java的虚拟机规范名称：" + props.getProperty("java.vm.specification.name"));        System.out.println("Java的虚拟机实现版本：" + props.getProperty("java.vm.version"));        System.out.println("Java的虚拟机实现供应商：" + props.getProperty("java.vm.vendor"));        System.out.println("Java的虚拟机实现名称：" + props.getProperty("java.vm.name"));        System.out.println("Java运行时环境规范版本：" + props.getProperty("java.specification.version"));        System.out.println("Java运行时环境规范供应商：" + props.getProperty("java.specification.vender"));        System.out.println("Java运行时环境规范名称：" + props.getProperty("java.specification.name"));        System.out.println("Java的类格式版本号：" + props.getProperty("java.class.version"));        System.out.println("Java的类路径：" + props.getProperty("java.class.path"));        System.out.println("加载库时搜索的路径列表：" + props.getProperty("java.library.path"));        System.out.println("默认的临时文件路径：" + props.getProperty("java.io.tmpdir"));        System.out.println("一个或多个扩展目录的路径：" + props.getProperty("java.ext.dirs"));        System.out.println("操作系统的名称：" + props.getProperty("os.name"));        System.out.println("操作系统的构架：" + props.getProperty("os.arch"));        System.out.println("操作系统的版本：" + props.getProperty("os.version"));        System.out.println("文件分隔符：" + props.getProperty("file.separator"));        //在 unix 系统中是＂／＂        System.out.println("路径分隔符：" + props.getProperty("path.separator"));        //在 unix 系统中是＂:＂        System.out.println("行分隔符：" + props.getProperty("line.separator"));        //在 unix 系统中是＂/n＂        System.out.println("用户的账户名称：" + props.getProperty("user.name"));        System.out.println("用户的主目录：" + props.getProperty("user.home"));        System.out.println("用户的当前工作目录：" + props.getProperty("user.dir"));    }    public static void main(String[] args) {        getConfig();        Config();        all();    }}