前言：

最近在用JAVA开发一个系统检测的管理软件，其中需要对当前电脑的操作系统是什么做出判断。其实JAVA要获取当前操作系统的相关信息并不难，直接使用System.getProperty("os.name")方法就可以获得操作系统的相关属性。我们只要把通过该方法获取的值和对应的操作系统代码进行比对就可以了。

JAVA判断操作系统代码：

EPlatform.java

public enum EPlatform {
    Any("any"), Linux("Linux"), Mac_OS("Mac OS"), Mac_OS_X("Mac OS X"), Windows("Windows"),
    OS2("OS/2"), Solaris("Solaris"), SunOS("SunOS"), MPEiX("MPE/iX"), HP_UX("HP-UX"), AIX("AIX"),
    OS390("OS/390"), FreeBSD("FreeBSD"), Irix("Irix"), Digital_Unix("Digital Unix"),
    NetWare_411("NetWare"), OSF1("OSF1"), OpenVMS("OpenVMS"), Others("Others");
     
    private EPlatform(String desc) {
        this.description = desc;
    }
     
    public String toString() {
        return description;
    }
     
    private String description;
}

public class OSInfo {
    private static String OS = System.getProperty("os.name").toLowerCase();
    private static OSInfo _instance = new OSInfo();
    private EPlatform  platform;
    private OSInfo() {
    }
    public static boolean isLinux() {
        return OS.indexOf("linux") >= 0;
    }
    public static boolean isMacOS() {
        return OS.indexOf("mac") >= 0 && OS.indexOf("os") > 0 && OS.indexOf("x") < 0;
    }
     
    public static boolean isMacOSX() {
        return OS.indexOf("mac") >= 0 && OS.indexOf("os") > 0 && OS.indexOf("x") > 0;
    }
    public static boolean isWindows() {
        return OS.indexOf("windows") >= 0;
    }
    public static boolean isOS2() {
        return OS.indexOf("os/2") >= 0;
    }
    public static boolean isSolaris() {
        return OS.indexOf("solaris") >= 0;
    }
     
    public static boolean isSunOS() {
        return OS.indexOf("sunos") >= 0;
    }
     
    public static boolean isMPEiX() {
        return OS.indexOf("mpe/ix") >= 0;
    }
     
    public static boolean isHPUX() {
        return OS.indexOf("hp-ux") >= 0;
    }
     
    public static boolean isAix() {
        return OS.indexOf("aix") >= 0;
    }
     
    public static boolean isOS390() {
        return OS.indexOf("os/390") >= 0;
    }
     
    public static boolean isFreeBSD() {
        return OS.indexOf("freebsd") >= 0;
    }
     
    public static boolean isIrix() {
        return OS.indexOf("irix") >= 0;
    }
    public static boolean isDigitalUnix() {
        return OS.indexOf("digital") >= 0 && OS.indexOf("unix") > 0;
    }
    public static boolean isNetWare() {
        return OS.indexOf("netware") >= 0;
    }
    public static boolean isOSF1() {
        return OS.indexOf("osf1") >= 0;
    }
    public static boolean isOpenVMS() {
        return OS.indexOf("openvms") >= 0;
    }
     
    /** 
     * 堆代码 duidaima.com
     * 获取操作系统名字 
     * @return 操作系统名 
     */
    public static EPlatform getOSname() {
        if (isAix()) {
            _instance.platform = EPlatform.AIX;
        } else if (isDigitalUnix()) {
            _instance.platform = EPlatform.Digital_Unix;
        } else if (isFreeBSD()) {
            _instance.platform = EPlatform.FreeBSD;
        } else if (isHPUX()) {
            _instance.platform = EPlatform.HP_UX;
        } else if (isIrix()) {
            _instance.platform = EPlatform.Irix;
        } else if (isLinux()) {
            _instance.platform = EPlatform.Linux;
        } else if (isMacOS()) {
            _instance.platform = EPlatform.Mac_OS;
        } else if (isMacOSX()) {
            _instance.platform = EPlatform.Mac_OS_X;
        } else if (isMPEiX()) {
            _instance.platform = EPlatform.MPEiX;
        } else if (isNetWare()) {
            _instance.platform = EPlatform.NetWare_411;
        } else if (isOpenVMS()) {
            _instance.platform = EPlatform.OpenVMS;
        } else if (isOS2()) {
            _instance.platform = EPlatform.OS2;
        } else if (isOS390()) {
            _instance.platform = EPlatform.OS390;
        } else if (isOSF1()) {
            _instance.platform = EPlatform.OSF1;
        } else if (isSolaris()) {
            _instance.platform = EPlatform.Solaris;
        } else if (isSunOS()) {
            _instance.platform = EPlatform.SunOS;
        } else if (isWindows()) {
            _instance.platform = EPlatform.Windows;
        } else {
            _instance.platform = EPlatform.Others;
        }
        return _instance.platform;
    }
     
    /** 
     * @param args 
     */
    public static void main(String[] args) {
        System.out.println(OSInfo.getOSname());
    }
}

总结：

JAVA获取当前操作系统的主要实现步骤：

1.通过枚举把每个操作系统对应的代码枚举出来

2.通过System.getProperty("os.name")方法获取当前操作系统的代码

3.把从系统获取的代码和枚举中定义的操作系统代码进行比对最终获得当前操作系统的信息。