System.getProperty()參數大全 http://yueguangyuan.iteye.com/blog/71940
# java.version Java Runtime Environment version
# java.vendor Java Runtime Environment vendor
# java.vendor.url Java vendor URL
#
java.home Java installation directory
#
java.vm.specification.version Java Virtual Machine specification version
#
java.vm.specification.vendor Java Virtual Machine specification vendor
#
java.vm.specification.name Java Virtual Machine specification name
#
java.vm.version Java Virtual Machine implementation
version
# java.vm.vendor Java Virtual Machine
implementation vendor
# java.vm.name Java Virtual
Machine implementation name
# java.specification.version Java Runtime
Environment specification version
# java.specification.vendor Java
Runtime Environment specification vendor
# java.specification.name
Java Runtime Environment specification name
#
java.class.version Java class format version number
#
java.class.path Java class path
#
java.library.path List of paths to search when loading libraries
# java.io.tmpdir Default temp file path
#
java.compiler Name of JIT compiler to use
#
java.ext.dirs Path of extension directory or directories
# os.name Operating system name
#
os.arch Operating system architecture
#
os.version Operating system version
#
file.separator File separator ("/" on UNIX)
#
path.separator Path separator (":" on UNIX)
#
line.separator Line separator ("\n" on UNIX)
#
user.name User's account name
# user.home
User's home directory
#
user.dir
User's current working
directory