摘要：
本文将个人实验与在线数据集成相结合。@http://blog.csdn.net/snannan_268/article/details/5511614Stringpath=newFile（application.getRealPath（request.getServletPath（）））.getParent（）；//Path获取jsp文件的绝对路径1.使用System。getProperty（）函数获取当前路径
本文结合个人实验与网上资料整合@http://blog.csdn.net/snannan_268/article/details/5511614
String path = new File(application.getRealPath(request.getServletPath() )).getParent(); //路径获取jsp文件绝对路径
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
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
JAVA中获取路径
关键字: java中获取路径JAVA中获取路径:
1.jsp中取得路径：
以工程名为TEST为例：
(1)得到包含工程名的当前页面全路径：request.getRequestURI()
结果：/TEST/test.jsp
(2)得到工程名：request.getContextPath()
结果：/TEST
(3)得到当前页面所在目录下全名称：request.getServletPath()
结果：如果页面在jsp目录下 /TEST/jsp/test.jsp
(4)得到页面所在服务器的全路径：application.getRealPath("页面.jsp")
结果：D:/resin/webapps/TEST/test.jsp
(5)得到页面所在服务器的绝对路径：absPath=new java.io.File(application.getRealPath(request.getRequestURI())).getParent();
结果：D:/resin/webapps/TEST
2.在类中取得路径：
(1)类的绝对路径：Class.class.getClass().getResource("/").getPath()
结果：/D:/TEST/WebRoot/WEB-INF/classes/pack/
(2)得到工程的路径：System.getProperty("user.dir")
结果：D:/TEST
3.在Servlet中取得路径：
(1)得到工程目录：request.getSession().getServletContext().getRealPath("") 参数可具体到包名。
结果：E:/Tomcat/webapps/TEST
(2)得到IE地址栏地址：request.getRequestURL()
结果：http://localhost:8080/TEST/test
(3)得到相对地址：request.getRequestURI()
结果：/TEST/test
1.jsp中取得路径：
以工程名为TEST为例：
(1)得到包含工程名的当前页面全路径：request.getRequestURI()
结果：/TEST/test.jsp
(2)得到工程名：request.getContextPath()
结果：/TEST
(3)得到当前页面所在目录下全名称：request.getServletPath()
结果：如果页面在jsp目录下 /TEST/jsp/test.jsp
(4)得到页面所在服务器的全路径：application.getRealPath("页面.jsp")
结果：D:/resin/webapps/TEST/test.jsp
(5)得到页面所在服务器的绝对路径：absPath=new java.io.File(application.getRealPath(request.getRequestURI())).getParent();
结果：D:/resin/webapps/TEST
2.在类中取得路径：
(1)类的绝对路径：Class.class.getClass().getResource("/").getPath()
结果：/D:/TEST/WebRoot/WEB-INF/classes/pack/
(2)得到工程的路径：System.getProperty("user.dir")
结果：D:/TEST
3.在Servlet中取得路径：
(1)得到工程目录：request.getSession().getServletContext().getRealPath("") 参数可具体到包名。
结果：E:/Tomcat/webapps/TEST
(2)得到IE地址栏地址：request.getRequestURL()
结果：http://localhost:8080/TEST/test
(3)得到相对地址：request.getRequestURI()
结果：/TEST/test
--ROOT/player.jsp
<%@page language="java" contentType="text/html;charset=utf-8"%>
<%@page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8"%>
<%@page import="java.io.*"%>
<%
String path = new File(application.getRealPath(request.getServletPath() )).getParent(); //路径
out.println(path+" "+request.getServletPath()+"<br/>" );
out.println(System.getProperty("user.dir")+"<br/>");
out.println("-------------------------<br/>");
File directory = new File("");//设定为当前文件夹
out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径
out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径
out.println("-------------------------<br/>");
directory = new File("abc");
out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径
out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径
out.println(directory.getPath()+"<br/>");//获取标准的路径
out.println("-------------------------<br/>");
directory = new File(".");
out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径
out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径
out.println(directory.getPath()+"<br/>");//获取标准的路径
out.println("-------------------------<br/>");
directory = new File("..");
out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径
out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径
out.println(directory.getPath()+"<br/>");//获取标准的路径
out.println("-------------------------<br/>");//<span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">.jsp中取得路径：</span><span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">3.在Servlet中取得路径： </span>
out.println(request.getRequestURI() +"<br/>");
out.println(request.getContextPath() +"<br/>");
out.println(request.getServletPath() +"<br/>");
out.println(application.getRealPath("player.jsp") +"<br/>");
out.println(new File(application.getRealPath(request.getRequestURI())).getParent() +"<br/>");
out.println(request.getSession().getServletContext().getRealPath("") +"<br/>");<span style="font-family: Arial;">//3.在Servlet中取得路径： </span>
out.println(request.getRequestURL() +"<br/>");
%>
结果如下
F:WebSpaceJ2EEwebwebappsROOT /player.jsp C:UsersFuChenD ------------------------- C:UsersFuChenD C:UsersFuChenD ------------------------- C:UsersFuChenDabc C:UsersFuChenDabc abc ------------------------- C:UsersFuChenD C:UsersFuChenD. . ------------------------- C:Users C:UsersFuChenD.. .. ------------------------- /player.jsp /player.jsp null F:WebSpaceJ2EEwebwebappsROOT F:WebSpaceJ2EEwebwebappsROOT http://www.lovedxy.com:8080/player.jsp
--G:/Media/player.jsp
</pre>结果如下<p><pre name="code" class="html">G:Media /player.jsp C:UsersFuChenD ------------------------- C:UsersFuChenD C:UsersFuChenD ------------------------- C:UsersFuChenDabc C:UsersFuChenDabc abc ------------------------- C:UsersFuChenD C:UsersFuChenD. . ------------------------- C:Users C:UsersFuChenD.. .. ------------------------- /Media/player.jsp /Media /player.jsp null G:MediaMedia G:Media http://www.lovedxy.com:8080/Media/player.jsp
--G:/Media/四大名著之三国演义/player.jsp
</pre>结果如下<p><pre name="code" class="html">G:Media四大名著之三国演义 /四大名著之三国演义/player.jsp C:UsersFuChenD ------------------------- C:UsersFuChenD C:UsersFuChenD ------------------------- C:UsersFuChenDabc C:UsersFuChenDabc abc ------------------------- C:UsersFuChenD C:UsersFuChenD. . ------------------------- C:Users C:UsersFuChenD.. .. ------------------------- /Media/%E5%9B%9B%E5%A4%A7%E5%90%8D%E8%91%97%E4%B9%8B%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89/player.jsp /Media /四大名著之三国演义/player.jsp null G:MediaMedia\%E5%9B%9B%E5%A4%A7%E5%90%8D%E8%91%97%E4%B9%8B%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89 G:Media http://www.lovedxy.com:8080/Media/%E5%9B%9B%E5%A4%A7%E5%90%8D%E8%91%97%E4%B9%8B%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89/player.jsp