How to list contents of a server directory using J

Question

When writing a JSP file, how can I get the current directory of this file at runtime
(to be able to iterate the directory and list its contents)?

Would some file I/O operations be restricted because of some security issues?

I would prefer a solution without accessing some implementation-specific server variables / properties.

EDIT:
I wouldn't ask if it were as simple as new File("."), because this would just give the directory of server's executables.

Answer 1

A correct/working example:

File jsp = new File(request.getRealPath(request.getServletPath()));
File dir = jsp.getParentFile();
File[] list = dir.listFiles();

Answer 2

I have used this one,

File jspFile = new File(request.getRealPath(request.getServletPath()));
        File dir = jspFile.getParentFile();
        String requestURL = request.getRequestURL().toString();
        String urlDir = requestURL.substring(0, requestURL.lastIndexOf('/'));

        File[] files = dir.listFiles(new FilenameFilter() {
            @Override
            public boolean accept(File dir, String name) {
                return name.endsWith(".ipa");
            }
        });

Answer 3

As of Version 2.1 of the Java Servlet API use:

File jsp = new File(request.getSession().getServletContext().getRealPath(request.getServletPath()));
File dir = jsp.getParentFile();
File[] list = dir.listFiles();

Answer 4

        <%@page import="java.io.*" %> 
        <%@page import="java.util.*" %> 
        <%!        public void GetDirectory(String a_Path, Vector a_files, Vector a_folders) {
                File l_Directory = new File(a_Path);
                File[] l_files = l_Directory.listFiles();

                for (int c = 0; c < l_files.length; c++) {
                    if (l_files[c].isDirectory()) {
                        a_folders.add(l_files[c].getName());
                    } else {
                        a_files.add(l_files[c].getName());
                    }
                }


            }
        %> 

        <%
            Vector l_Files = new Vector(), l_Folders = new Vector();
            GetDirectory("C:/mydirectory/", l_Files, l_Folders);

            //folders should be left out... 
            //for( int a = 0 ; a<l_Folders.size() ; a++ ) 
            //out.println( "[<b>"+l_Folders.elementAt(a).toString() + "</b>]<br>") ; 

            //generate files as XML 
            out.println("<music>");

            for (int a = 0; a < l_Files.size(); a++) {
                out.println("<file>" + l_Files.elementAt(a).toString() + "</file>");
            }

            out.println("</music>");
        %> 

Replace "C:/mydirectory/" with your directory

Answer 5

you should know the path of the jsp within your web application so you can pass that to getRealPath()

File jsp = request.getRealPath(pathToJspInWebapp);  //eg. /WEB-INF/jsp/my.jsp
File directory = jsp.getParentFile();
File[] list = directory.listFiles();