关于Java获取系统信息

本文部分转载自: http://www.cnblogs.com/wuhenke/archive/2011/11/19/2255400.html

我总结的相关类似博客:http://www.cnblogs.com/DreamDrive/p/5760140.html

 一 .获取系统相关参数

  java 通过System.getProperties()获取系统参数

  Properties props=System.getProperties(); //系统属性

public class SystemInfo {
    public static void main(String[] args) {
        Properties sysProperty=System.getProperties(); //系统属性
        Set<Object> keySet = sysProperty.keySet();
        for (Object object : keySet) {
            String property = sysProperty.getProperty(object.toString());
            System.out.println(object.toString()+" : "+property);
        }
    }
}

汉语英语一一对应

public class SystemInfo {
    public static void main(String[] args) {
       System.out.println("Java的运行环境版本："+sysProperty.getProperty("java.version"));
       System.out.println("Java的运行环境供应商："+sysProperty.getProperty("java.vendor"));
       System.out.println("Java供应商的URL："+sysProperty.getProperty("java.vendor.url"));
       System.out.println("Java的安装路径："+sysProperty.getProperty("java.home"));
       System.out.println("Java的虚拟机规范版本："+sysProperty.getProperty("java.vm.specification.version"));
       System.out.println("Java的虚拟机规范供应商："+sysProperty.getProperty("java.vm.specification.vendor"));
       System.out.println("Java的虚拟机规范名称："+sysProperty.getProperty("java.vm.specification.name"));
       System.out.println("Java的虚拟机实现版本："+sysProperty.getProperty("java.vm.version"));
       System.out.println("Java的虚拟机实现供应商："+sysProperty.getProperty("java.vm.vendor"));
       System.out.println("Java的虚拟机实现名称："+sysProperty.getProperty("java.vm.name"));
       System.out.println("Java运行时环境规范版本："+sysProperty.getProperty("java.specification.version"));
       System.out.println("Java运行时环境规范供应商："+sysProperty.getProperty("java.specification.vender"));
       System.out.println("Java运行时环境规范名称："+sysProperty.getProperty("java.specification.name"));
       System.out.println("Java的类格式版本号："+sysProperty.getProperty("java.class.version"));
       System.out.println("Java的类路径："+sysProperty.getProperty("java.class.path"));
       System.out.println("加载库时搜索的路径列表："+sysProperty.getProperty("java.library.path"));
       System.out.println("默认的临时文件路径："+sysProperty.getProperty("java.io.tmpdir"));
       System.out.println("一个或多个扩展目录的路径："+sysProperty.getProperty("java.ext.dirs"));
       System.out.println("操作系统的名称："+sysProperty.getProperty("os.name"));
       System.out.println("操作系统的构架："+sysProperty.getProperty("os.arch"));
       System.out.println("操作系统的版本："+sysProperty.getProperty("os.version"));
       System.out.println("文件分隔符："+sysProperty.getProperty("file.separator"));   //在 unix 系统中是＂／＂
       System.out.println("路径分隔符："+sysProperty.getProperty("path.separator"));   //在 unix 系统中是＂:＂
       System.out.println("行分隔符："+sysProperty.getProperty("line.separator"));   //在 unix 系统中是＂/n＂
       System.out.println("用户的账户名称："+sysProperty.getProperty("user.name"));
       System.out.println("用户的主目录："+sysProperty.getProperty("user.home"));
       System.out.println("用户的当前工作目录："+sysProperty.getProperty("user.dir"));
    }
}

 二、获取系统环境变量

　　Map<String, String> getenv = System.getenv();

        Map<String, String> getenv = System.getenv();
        System.out.println(getenv);

 输出:

{USERPROFILE=C:Userskongxiaohan, 
ProgramData=C:ProgramData, 
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC, 
windows_tracing_logfile=C:BVTBinTestsinstallpackagecsilogfile.log, 
JAVA_HOME=C:Program FilesJavajdk1.7.0_65, 
MAVEN_HOME=D:apache-maven-3.0.5, windows_tracing_flags=3, 
TEMP=C:UsersKONGXI~1AppDataLocalTemp, 
SystemDrive=C:, ProgramFiles=C:Program Files, 
Path=C:/Program Files/Java/jdk1.7.0_65/bin/../jre/bin/client;
C:/Program Files/Java/jdk1.7.0_65/bin/../jre/bin;
C:/Program Files/Java/jdk1.7.0_65/bin/../jre/lib/i386;
C:Program FilesNVIDIA CorporationPhysXCommon;
C:Program FilesJavajdk1.7.0_65in;
C:Windowssystem32;C:Windows;
C:WindowsSystem32Wbem;
C:WindowsSystem32WindowsPowerShellv1.0;
C:Program FilesEmEditor;
D:Program FilesMySQLMySQL Server 5.5in;
D:Program FilesSubversionin;
D:Program FilesTortoiseSVNin;
D:ITCASTjavaday72_NoSql系列之mongoDB数据库mongodb-win32-i386-2.4.3in;
E:insta;tclient_12_1;
D:apache-maven-3.0.5in;
C:Program FilesVanDyke SoftwareClients;
G:eclipse;, HOMEDRIVE=C:, PROCESSOR_REVISION=2502, USERDOMAIN=PC-ACER, ALLUSERSPROFILE=C:ProgramData, VBOX_INSTALL_PATH=C:Program FilesOracleVirtualBox\, PROCESSOR_IDENTIFIER=x86 Family 6 Model 37 Stepping 2, GenuineIntel, SESSIONNAME=Console, TMP=C:UsersKONGXI~1AppDataLocalTemp, CommonProgramFiles=C:Program FilesCommon Files, =::=::\, LOGONSERVER=\PC-ACER, PROCESSOR_ARCHITECTURE=x86, FP_NO_HOST_CHECK=NO, OS=Windows_NT, HOMEPATH=Userskongxiaohan, PROCESSOR_LEVEL=6, APR_ICONV_PATH=D:Program FilesSubversioniconv, LOCALAPPDATA=C:UserskongxiaohanAppDataLocal, COMPUTERNAME=PC-ACER, windir=C:Windows, SystemRoot=C:Windows, NUMBER_OF_PROCESSORS=4, USERNAME=kongxiaohan, PUBLIC=C:UsersPublic, PSModulePath=C:Windowssystem32WindowsPowerShellv1.0Modules\, NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK, LANG=zh_CN, ComSpec=C:Windowssystem32cmd.exe, APPDATA=C:UserskongxiaohanAppDataRoaming}

三、获取IP、 计算机名、MAC、 硬盘卷序号

SystemInfo.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Properties;

/**
 * 获取当前系统信息
 */
public class SystemInfo {
    // 当前实例
    private static SystemInfo currentSystem = null;
    private InetAddress localHost = null;

    private SystemInfo() {
        try {
            localHost = InetAddress.getLocalHost();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * 单例模式获取对象
     * 
     * @return
     */
    public static SystemInfo getInstance() {
        if (currentSystem == null)
            currentSystem = new SystemInfo();
        return currentSystem;
    }

    /**
     * 本地IP
     * 
     * @return IP地址
     */
    public String getIP() {
        String ip = localHost.getHostAddress();
        return ip;
    }

    /**
     * 获取用户机器名称
     * 
     * @return
     */
    public String getHostName() {
        return localHost.getHostName();
    }

    /**
     * 获取C盘卷 序列号
     * 
     * @return
     */
    public String getDiskNumber() {
        String line = "";
        String HdSerial = "";// 记录硬盘序列号

        try {

            Process proces = Runtime.getRuntime().exec("cmd /c dir c:");// 获取命令行参数
            BufferedReader buffreader = new BufferedReader(
                    new InputStreamReader(proces.getInputStream()));

            while ((line = buffreader.readLine()) != null) {

                if (line.indexOf("卷的序列号是 ") != -1) { // 读取参数并获取硬盘序列号

                    HdSerial = line.substring(line.indexOf("卷的序列号是 ")
                            + "卷的序列号是 ".length(), line.length());
                    break;
                }
            }

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return HdSerial;
    }

    /**
     * 获取Mac地址
     * 
     * @return Mac地址，例如：F0-4D-A2-39-24-A6
     */
    public String getMac() {
        NetworkInterface byInetAddress;
        try {
            byInetAddress = NetworkInterface.getByInetAddress(localHost);
            byte[] hardwareAddress = byInetAddress.getHardwareAddress();
            return getMacFromBytes(hardwareAddress);
        } catch (SocketException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 获取当前系统名称
     * 
     * @return 当前系统名，例如： windows xp
     */
    public String getSystemName() {
        Properties sysProperty = System.getProperties();
        // 系统名称
        String systemName = sysProperty.getProperty("os.name");
        return systemName;
    }

    private String getMacFromBytes(byte[] bytes) {
        StringBuffer mac = new StringBuffer();
        byte currentByte;
        boolean first = false;
        for (byte b : bytes) {
            if (first) {
                mac.append("-");
            }
            currentByte = (byte) ((b & 240) >> 4);
            mac.append(Integer.toHexString(currentByte));
            currentByte = (byte) (b & 15);
            mac.append(Integer.toHexString(currentByte));
            first = true;
        }
        return mac.toString().toUpperCase();
    }
}

SystemInfoTest.java

public class SystemInfoTest {
    public static void main(String[] args) {
        SystemInfo syso = SystemInfo.getInstance();
        System.out.println("IP地址:"+syso.getIP());
        System.out.println("主机名称:"+syso.getHostName());
        System.out.println("获取C盘卷 序列号"+syso.getDiskNumber());
        System.out.println("Mac地址"+syso.getMac());
        System.out.println("获取当前系统名称"+syso. getSystemName());
    }
}

 输出结果:

IP地址:169.254.247.195
主机名称:pc-acer
获取C盘卷 序列号A0E7-407C
Mac地址08-00-27-00-90-35
获取当前系统名称Windows 7

//================================================================================

关于获取文件编码相关的属性值:

import java.nio.charset.Charset;

public class GetDefaultCharset {
    public static void main(String[] args) {
        // 获取系统默认编码
        System.out.println(System.getProperty("file.encoding"));

        // 获取系统默认的字符编码
        System.out.println(Charset.defaultCharset());

        // 获取系统默认语言
        System.out.println(System.getProperty("user.language"));

        // 获取系统属性列表
         System.getProperties().list(System.out);

        // 设置编码
         System.getProperties().put("file.encoding", "GBK");
    }
}