1, 利用 System.getProperty() 函数获取当前路径:
System.out.println(System.getProperty("user.dir"));//user.dir 指定了当前的路径
2, 使用 File 提供的函数获取当前路径:
- File directory = new File("");// 设定为当前文件夹
- try{
- System.out.println(directory.getCanonicalPath());// 获取标准的路径
- System.out.println(directory.getAbsolutePath());// 获取绝对路径
- }catch(Exceptin e){}
File.getCanonicalPath() 和 File.getAbsolutePath() 大约只是对于 new File(".") 和 new File("..") 两种路径有所区别.
- # 对于 getCanonicalPath() 函数,"." 就表示当前的文件夹, 而 ".." 则表示当前文件夹的上一级文件夹
- # 对于 getAbsolutePath() 函数, 则不管 ".","..", 返回当前的路径加上你在 new File() 时设定的路径
- # 至于 getPath() 函数, 得到的只是你在 new File() 时设定的路径
比如当前的路径为 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() 中的字符串参数如下:
System.getProperty() 参数大全
- # 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
来源: http://www.bubuko.com/infodetail-2766768.html