这几天一直在搞Java,模板引擎系列和程序猿执业修养系列都暂停了,在Java上忙的不亦乐乎!由于对Java还不太熟悉,经历了各种纠结终于完成了任务。以下是关于Java获取当前目录的方法的备忘录。
原文地址:http://www.cnblogs.com/diyunpeng/archive/2011/06/06/2073567.html
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
http://www.cnblogs.com/ymind/archive/2012/04/22/2465629.html
java获得当前文件路径:
第一种:
File f = new File(this.getClass().getResource("/").getPath());
System.out.println(f);
结果:
C:\Documents%20and%20Settings\Administrator\workspace\projectName\bin
获取当前类的所在工程路径;
如果不加“/”
File f = new File(this.getClass().getResource("").getPath());
System.out.println(f);
结果:
C:\Documents%20and%20Settings\Administrator\workspace\projectName\bin\com\test
获取当前类的绝对路径;
第二种:
File directory = new File("");//参数为空
String courseFile = directory.getCanonicalPath() ;
System.out.println(courseFile);
结果:
C:\Documents and Settings\Administrator\workspace\projectName
获取当前类的所在工程路径;
第三种:
URL xmlpath = this.getClass().getClassLoader().getResource("selected.txt");
System.out.println(xmlpath);
结果:
file:/C:/Documents%20and%20Settings/Administrator/workspace/projectName/bin/selected.txt
获取当前工程src目录下selected.txt文件的路径
第四种:
System.out.println(System.getProperty("user.dir"));
结果:
C:\Documents and Settings\Administrator\workspace\projectName
获取当前工程路径
第五种:
System.out.println( System.getProperty("java.class.path"));
结果:
C:\Documents and Settings\Administrator\workspace\projectName\bin
获取当前工程路径
http://www.cnblogs.com/lostyue/archive/2011/06/27/2091686.html