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:\Users\kongxiaohan,
ProgramData=C:\ProgramData,
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC,
windows_tracing_logfile=C:\BVTBin\Tests\installpackage\csilogfile.log,
JAVA_HOME=C:\Program Files\Java\jdk1.7.0_65,
MAVEN_HOME=D:\apache-maven-3.0.5, windows_tracing_flags=3,
TEMP=C:\Users\KONGXI~1\AppData\Local\Temp,
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 Files\NVIDIA Corporation\PhysX\Common;
C:\Program Files\Java\jdk1.7.0_65\bin;
C:\Windows\system32;C:\Windows;
C:\Windows\System32\Wbem;
C:\Windows\System32\WindowsPowerShell\v1.0\;
C:\Program Files\EmEditor;
D:\Program Files\MySQL\MySQL Server 5.5\bin;
D:\Program Files\Subversion\bin;
D:\Program Files\TortoiseSVN\bin;
D:\ITCAST\java\day72_NoSql系列之mongoDB数据库\mongodb-win32-i386-2.4.3\bin;
E:\insta;tclient_12_1;
D:\apache-maven-3.0.5\bin;
C:\Program Files\VanDyke Software\Clients\;
G:\eclipse;, HOMEDRIVE=C:, PROCESSOR_REVISION=2502, USERDOMAIN=PC-ACER, ALLUSERSPROFILE=C:\ProgramData, VBOX_INSTALL_PATH=C:\Program Files\Oracle\VirtualBox\, PROCESSOR_IDENTIFIER=x86 Family 6 Model 37 Stepping 2, GenuineIntel, SESSIONNAME=Console, TMP=C:\Users\KONGXI~1\AppData\Local\Temp, CommonProgramFiles=C:\Program Files\Common Files, =::=::\, LOGONSERVER=\\PC-ACER, PROCESSOR_ARCHITECTURE=x86, FP_NO_HOST_CHECK=NO, OS=Windows_NT, HOMEPATH=\Users\kongxiaohan, PROCESSOR_LEVEL=6, APR_ICONV_PATH=D:\Program Files\Subversion\iconv, LOCALAPPDATA=C:\Users\kongxiaohan\AppData\Local, COMPUTERNAME=PC-ACER, windir=C:\Windows, SystemRoot=C:\Windows, NUMBER_OF_PROCESSORS=4, USERNAME=kongxiaohan, PUBLIC=C:\Users\Public, PSModulePath=C:\Windows\system32\WindowsPowerShell\v1.0\Modules\, NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK, LANG=zh_CN, ComSpec=C:\Windows\system32\cmd.exe, APPDATA=C:\Users\kongxiaohan\AppData\Roaming}

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");
     }
 }