System.getProperties()可以确定当前的系统属性 获取当前运行路径
Key Meaning ------------------- ------------------------------ "file.separator" File separator (e.g., "/") "java.class.path" Java classpath "java.class.version" Java class version number "java.home" Java installation directory "java.vendor" Java vendor-specific string
"java.vendor.url" Java vendor URL "java.version" Java version number "line.separator" Line separator "os.arch" Operating system architecture "os.name" Operating system name
"path.separator" Path separator (e.g., ":") "user.dir" User's current working directory //获取当前运行路径 "user.home" User home directory "user.name" User account name