java获取系统属性和属性值
通过java可以获取系统信息，例如
打印出来的效果为：java.runtime.name==Java(TM) SE Runtime Environmentsun.boot.library.path==D:\Java\jdk1.6.0_10\fastdebug\jre\binjava.vm.version==1.6.0_10-ea-fastdebug-b08-fastdebugjava.vm.vendor==Sun Microsystems Inc.java.vendor.url==http://java.sun.com/path.separator==;java.vm.name==Java HotSpot(TM) Client VMfile.encoding.pkg==sun.iosun.java.launcher==SUN_STANDARDuser.country==CNsun.os.patch.level==Service Pack 3java.vm.specification.name==Java Virtual Machine Specificationuser.dir==D:\workspace\Testjava.runtime.version==1.6.0_10-ea-fastdebug-b08java.awt.graphicsenv==sun.awt.Win32GraphicsEnvironmentjava.endorsed.dirs==D:\Java\jdk1.6.0_10\fastdebug\jre\lib\endorsedos.arch==x86java.io.tmpdir==C:\DOCUME~1\baomi\LOCALS~1\Temp\line.separator==java.vm.specification.vendor==Sun Microsystems Inc.user.variant==os.name==Windows XPsun.jnu.encoding==GBKjava.library.path==D:\Java\jdk1.6.0_10java.specification.name==Java Platform API Specificationjava.class.version==50.0sun.management.compiler==HotSpot Client Compileros.version==5.1user.home==C:\Documents and Settings\baomiuser.timezone==java.awt.printerjob==sun.awt.windows.WPrinterJobfile.encoding==UTF-8java.specification.version==1.6java.class.path==D:\workspace\Test\binuser.name==baomijava.vm.specification.version==1.0java.home==D:\Java\jdk1.6.0_10\fastdebug\jresun.arch.data.model==32user.language==zhjava.specification.vendor==Sun Microsystems Inc.awt.toolkit==sun.awt.windows.WToolkitjava.vm.info==mixed modejava.version==1.6.0_10-ea-fastdebugjava.ext.dirs==D:\Java\jdk1.6.0_10\fastdebug\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\extsun.boot.class.path==D:\Java\jdk1.6.0_10\fastdebug\jre\lib\resources.jar;D:\Java\jdk1.6.0_10\fastdebug\jre\lib\rt.jar;D:\Java\jdk1.6.0_10\fastdebug\jre\lib\sunrsasign.jar;D:\Java\jdk1.6.0_10\fastdebug\jre\lib\jsse.jar;D:\Java\jdk1.6.0_10\fastdebug\jre\lib\jce.jar;D:\Java\jdk1.6.0_10\fastdebug\jre\lib\charsets.jar;D:\Java\jdk1.6.0_10\fastdebug\jre\classesjava.vendor==Sun Microsystems Inc.file.separator==\java.vendor.url.bug==http://java.sun.com/cgi-bin/bugreport.cgisun.io.unicode.encoding==UnicodeLittlesun.cpu.endian==littlesun.desktop==windowssun.cpu.isalist==baomi
