核心提示:1、利用System.getProperty()函數獲取當前路徑: System.out.println(System.getProperty(user.dir));//user.dir指定了當前的路徑 2、使用File提供的函數獲取當前路徑: File directory = new File();//設定為當前文件夾 try{ System.out.println(directory.
1、利用System.getProperty()函數獲取當前路徑:
System.out.println(System.getProperty("user.dir"));//user.dir指定了當前的路徑
2、使用File提供的函數獲取當前路徑:
File directory = new File("");//設定為當前文件夾
try{
System.out.println(directory.getCanonicalPath());//獲取標准的路徑
System.out.println(directory.getAbsolutePath());//獲取絕對路徑
}catch(Exceptin e){}
File.getCanonicalPath()和File.getAbsolutePath()大約只是對於new File(".")和new File("..")兩種路徑有所區別。
# 對於getCanonicalPath()函數,“."就表示當前的文件夾,而”..“則表示當前文件夾的上一級文件夾
# 對於getAbsolutePath()函數,則不管”.”、“..”,返回當前的路徑加上你在new File()時設定的路徑
# 至於getPath()函數,得到的只是你在new File()時設定的路徑
比如當前的路徑為 C:\test :
File directory = new File("abc");
directory.getCanonicalPath(); //得到的是C:\test\abc
directory.getAbsolutePath(); //得到的是C:\test\abc
direcotry.getPath(); //得到的是abc
File directory = new File(".");
directory.getCanonicalPath(); //得到的是C:\test
directory.getAbsolutePath(); //得到的是C:\test\.
direcotry.getPath(); //得到的是.
File directory = new File("..");
directory.getCanonicalPath(); //得到的是C:\
directory.getAbsolutePath(); //得到的是C:\test\..
direcotry.getPath(); //得到的是..
另外:System.getProperty()中的字符串參數如下:
System.getProperty()參數大全
# 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