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 ReadIpConfig {    //通过截取cmd流方式得到计算机的配置信息(不好)    public static List< String> getIpAddress(){        Process p = null;        List< String> address  = new ArrayList< String>();        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< String,String> 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();    }}