请问：如何得到jsp所在的物理路径和web虚拟路径?

问题点数：50、回复次数：1Top

1 楼x86（大雪）回复于 2000-12-25 11:33:00 得分 50

You   should   use   the   ServletContext.getRealPath   method    
  to   access   files   in   your   context.      
  In   JSP,   the   ServletContext   is   exposed   through   the   implicit   object  
  "application".     For   example:  
  new   File(application.getRealPath("/WEB-INF/")   +   "mydatafile.txt");  
  or  
  new   File(application.getRealPath("/WEB-INF/mydatafile.txt");  
  As   you   notice   the   File   parameter   is   given   in   the   form   of   a   URL  
  that   starts   off   with   "/".     The   file   URL   is   relative   to   your  
  Servlet   Context   although   it   starts   off   with   "/".  
  The   above   getRealPath   call   from   a   Servlet   may   look   like:  
  new   File(getServletContext().getRealPath("/WEB-INF/")   +   "mydatafile.txt");  
  or  
  new   File(getServletContext().getRealPath("/WEB-INF/mydatafile.txt");  
   
  Another   method   to   use   to   access   Files   is   ServletContext.getResourceAsStream.  
  ServletContext.getResourceAsStream   is   used   in   the   follwing   manner:  
  String   text   =   null;  
  InputStream   mi   =   application.getResourceAsStream("/WEB-INF/data.txt");  
  int   av   =   mi.available();  
  if   (av   >   0)  
  {  
  byte[]   b   =   new   byte[av];  
  mi.read(b,0,av);  
  text   =   new   String   (b);  
  }  
  Top

相关问题

• application
• mydatafile
• getrealpath
• servletcontext
• getresourceasstream
• av
• inf
• txt
• mi

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