What I posted was an excerpt from a jsp page writing the index of a
folder -- no Struts in sight. "directory" was just an arbitrary request
parameter for example purposes:
http://localhost:8080/myWebApp/imageList.jsp?directory=%2fsome%2fdirectory
It doesn't really matter how you get that string. In your case, you
don't even need the for loop -- just write the count or store it in the
pageContext for later use in a tag like <c:out value="${fileCount}" />
For getting the count of files, just replace the contents of the if
(dirFile.isDirectory()) block with this one statement:
pageContext.setAttribute( "fileCount", dirFile.list().length ) ;
And then you can write it out later using the c:out tag as above or
<%=pageContext.getAttribute( "fileCount" )%>
--David
maya wrote:
yes I know, eventually I want to do this whole webapp in struts.. for
now just want to be able to count how many images in 'images' folder..
(what I don't get here is first line.. where does the reqParameter
come from? (this method is usu. used to get params from request (user
input, query string, etc..) so don't get where "directory" is coming
from here..)
thank you very much..
David Smith wrote:
Ok... I think I'm starting to see the picture here. You want to be
able to write a jsp that can list the directory contents of a
folder. This is very crude, no error checking, untested, etc. but
you'll catch on....
<ul>
<%
String reqParameter = request.getParameter( "directory" ) ;
URI dirURI = this.getServletContext().getResource( reqParameter
).toURI() ;
File dirFile = new File( dirURI ) ;
if ( dirFile.isDirectory() ) {
String[] fileList = dirFile.list() ;
for ( int index = 0; index < fileList.length; index++ ) {
out.println( "<li>" + fileList[ index ] + "</li>" ) ;
}
}
%>
</ul>
And it does comply with the servlet spec.
--David
maya wrote:
thank you.. someone in another forum said the same thing.. problem
is, if I have trouble accessing directory, how will I tell these
methods to "get Resource" for that dir????? :)
(also, alas, don't quite remember how to use methods of interfaces
-- since interfaces can't be instantiated, didn't find getInstance()
method for this interface.. but well, can look this up elsewhere, I
suppose....:)
thank you...
David Smith wrote:
I'm not sure what you're attempting to do here, but have you
thought about ServletContext.getResource() and
ServletContext.getResourceAsStream() ? Both are safe methods of
reading resources from the webapp whether it be in a compressed
archive or not. There is also getRealPath(), but it will only work
if the webapp is expanded (ie not a .war file).
I can't recommend it enough -- read the servlet spec. It really
does help.
--David
maya wrote:
File dir = new File("C:\\apache-tomcat-5.5.17\\webapps\\india\\delhi\
\images");
this works fine in my machine locally, but on my website.. if, say,
I'm in dir where 'images' dir is, this doesn't work...
File dir = new File("images")
starting @ root of webapp also doesn't work...
File dir = new File("/india/delhi/images");
names of directors are good, they are all lowercase...
have conditional to test...
if (imgsList == null)
out.println("null");
always prints 'null' on my website...
do paths in this constructor have to be absolute? so on my website
path would have to start with "http..."?????
is this an access problem? if so, do I need to ask my webhosting
folks? I know this is not a very "kosher" way of doing it, but am
running this code in a JSP for now (still don't know enough struts
and such to do this kind of stuff in a stand-alone class.. but of
course eventually will have to.. all I want to do is count how
many images are in 'images' dir.. that's it..)
thank you...
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