System.getProperty(String key)的常用参数，

System.getProperty(String key)的常用参数，

System.getProperty(String key)的常用参数:

java.version                               Java Runtime Environment version              Java API 实现的版本
java.vendor                               Java Runtime Environment vendor                Java API 实现的厂商java.vendor.url                          Java vendor URL                                         Java API 规范厂商的URL
java.home                                 Java installation directory                              Java安装目录
java.vm.specification.version     Java Virtual Machine specification version      Java虚拟机规范的版本
java.vm.specification.vendor      Java Virtual Machine specification vendor       Java虚拟机规范的厂商
java.vm.specification.name        Java Virtual Machine specification name         Java虚拟机规范的名称
java.vm.version                        Java Virtual Machine implementation version   Java虚拟机的版本
java.vm.vendor                        Java Virtual Machine implementation vendor    Java虚拟机供应厂商
java.vm.name                           Java Virtual Machine implementation name      Java虚拟机实现的名称
java.specification.version         Java Runtime Environment specification version Java API 规范的版本 
java.specification.vendor         Java Runtime Environment specification vendor  Java API 规范的厂商
java.specification.name           Java Runtime Environment specification name     Java API 规范的名称
java.class.version                    Java class format version number                         Java类文件格式的版本
java.class.path                         Java class path                                                      装载类的路径
java.library.path                       List of paths to search when loading libraries       运行类库路径
java.io.tmpdir                           Default temp file path                                            默认的文件路径
java.compiler                            Name of JIT compiler to use                                   java语法分析器
java.ext.dirs                             Path of extension directory or directories
os.name                                   Operating system name                                           当前操作系统名称
os.arch                                    Operating system architecture                                 当前操作系统的体系架构 
os.version                                Operating system version                                        当前操作系统的版本
file.separator                             File separator ("/" on UNIX)                                    操作系统平台目录分割符
path.separator                          Path separator (":" on UNIX)                                  操作系统平台路径分割符
line.separator                            Line separator ("/n" on UNIX)                                平台文本行的分隔符
user.name                                 User's account name                                               用户的名称
user.home                                 User's home directory                                             当前用户根目录
user.dir                                      User's current working directory                             当前工作目录