Directory Listing in Java

Hi,
I need to display the directory structure as follows:
Dir Info
Given a directory, traverse them and to find the Size of each individual folders/subfolders in the directory tree, and its depth. Also in a suitable datastruct store the number of files in each dir, number of files by type etc. finally display all the info ie, size and depth of each dir, total number of files in each dir, number of files by type and the overall statistics (total number of files, total number of files by type, total size of the given directory and total number of sub dir etc...
some explanation for depth,the starting directory has a depth 0, 1st level subdirectories have a depth of 1 etc.
Related code will be helpful.
Thanks in advance

Please do not cross post!!!

Similar Messages

How to avoid directory listing in java web applications.

how to avoid directory listing in java web applications.
That is on typing the url of the application it should not the directory listing. Welcome tag in web.xml doesnot fully solve the problem, since still the images folder etc is still accessible

I know of two ways.
If you're using tomcat and have access to the conf directory.
Edit your $TOMCAT/conf/web.xml. Find your default servlet properties and change
<servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
    <init-param>
      <param-name>debug</param-name>
      <param-value>0</param-value>
    </init-param>
    <init-param>
      <param-name>listings</param-name>
      <param-value>true</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>to <servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
    <init-param>
      <param-name>debug</param-name>
      <param-value>0</param-value>
    </init-param>
    <init-param>
      <param-name>listings</param-name>
      <param-value>false</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>And restart your server. This will affect every directory on the server, and return a 405 directory browsing forbidden error.
Another way, is to place an index.jsp inside each directory with a simple one line redirect to your applications CONTEXT_PATH.response.sendRedirect("http://yourserver/yourapp/");This will only affect specific directories which contain these index.jsp files.
Hope this helps

Remote System Directory Listing/Navigation in JTree

Hi
I want my Remote System(Linux) directory listing to be available in a JTree. I need some help on implementing the same. Also How do i constantly get the directory structure of the remote system.
Thanks in Advance

http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html
http://en.wikipedia.org/wiki/Model-view-controller
How you get the data depends on how you access the server. Maybe FTP.

How to apply style sheet (.css) in Weblogic directory listing

Hi,
We are migrating a directory listing application from Apache to Weblogic.
Earlier we did this by Apache httpd.conf entry like below :
<Directory "/opt/apache/httpd-2.1.9/htdocs/Myreportfolder">
IndexOptions FancyIndexing FoldersFirst NameWidth=* XHTML
IndexOrderDefault Descending Date
IndexStyleSheet "/css/style.css"
</Directory>
/opt/apache/httpd-2.1.9/htdocs folder has all it's usual resource files.
We were able to see documents in "Myreportfolder".
Now we have moved to Weblogic and using virtual directory mapping as below and we are trying to achieve the same thing:
<?xml version="1.0" encoding="UTF-8" ?>
- <wls:weblogic-web-app xmlns:wls="http://www.bea.com/ns/weblogic/weblogic-web-app" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd http://www.bea.com/ns/weblogic/weblogic-web-app http://www.bea.com/ns/weblogic/weblogic-web-app/1.0/weblogic-web-app.xsd">
- <wls:container-descriptor>
<wls:index-directory-enabled>true</wls:index-directory-enabled>
<wls:index-directory-sort-by>LAST_MODIFIED</wls:index-directory-sort-by>
</wls:container-descriptor>
- <wls:virtual-directory-mapping>
<wls:local-path>/Myreportfolder</wls:local-path>
<wls:url-pattern>/*</wls:url-pattern>
</wls:virtual-directory-mapping>
<wls:context-root>/getreports</wls:context-root>
</wls:weblogic-web-app>
We are able to view the reports but we do not get look-and-feel of Apache like directory listing.
but we encounter below issues:
1) File/Folder icons are not visible - we want to use style sheets in http header from the response that is returned from weblogic server
2) Filename is limited to 29 characters when it is showing
3) Files are not sortable as Descending order - we sorted using tag <wls:index-directory-sort-by>LAST_MODIFIED</wls:index-directory-sort-by> but the latest file is shown at the last
We are thinking that Weblogic must be having some configuration like Apache httpd.conf where we can apply style sheets (css ).
We would appreciate af anyone can provide better insight into the issue.
or is it possible to extend weblogic.servlet.fileservlet class to serve this purpose.
Thanks & regards,
Rabi

Hi Vikash,
Check the below links which will you idea on the same.
Stylesheet for WDA without integrating in SAP Portal
Apply custom css to WebDynpro application
Thanks
KH

List() in java.io.file

Hallo everybody!
Can someone solve a little problem for me?
I want to list files and directories in a directory. If one of the files is a dirctory I want to put an "/" to the end of it. I works well if I list the current directory but not if I try to list a path like c:\temp.
Here is my code :
public class Lista {
//int i;
int i = 0;
//File Katalog;
// constructors
public Lista() {
usage();
public Lista(String[] l_files) {
list_files(l_files);
// methods
// method called if 1 argument is passed to main
private void list_files(String[] lf) {
// first check if katalog is a file
File katalog = new File(lf[0]);
// String c = new String(lf[1]);
if (katalog.isFile()) {
System.out.println(katalog + " is a file");
System.exit(1);
// check if katalog exists
if (katalog.exists()) {
String[] en_lista = katalog.list();
while (i < en_lista.length) {
File f = new File(en_lista);
if (f.isDirectory() == true) {
//if (f.isFile()) {
//f.getParent();
System.out.println(f + "/");
else {
System.out.println(f);
i++;
else
System.out.println(katalog + " doesn't exist");
// method called if no or more than 1 argument are passed to main
private void usage() {
System.out.println("\nusage : " + "\njava Lista directory");
System.exit(0);
public static void main(String[] args) {
// depending on the number of arguments passed to main different constructors are called
if (args.length < 1 || args.length > 2) {
new Lista();
else if (args.length == 1) {
new Lista(args);

**** example 1 ******
Here it works as I want it to do
java Lista . givs the output
directory/ (the slash mark that it is a directory)
Lista.class
Lista.java
**** example 2 ******
If I list like below it doesn't work
java Lista c:\temp givs the output
directory
file.txt
(I want to have the slash in the end of the directory to mark it's a directory but it doesn't)

Directory listing for a directory within the webapplication

Hi,
I have a the code which does the directory listing of a given directory using its absolute path. eg new File("c:/webapp/tempdir");).
I want to do the directory listing by giving a path relative to the context path of the webapp like(new File("/temp");)
When I try to do
<%
File f1=new File("/tempDir");
f1.exists(); --> returns flase
%>
tempDir is a directory in my webapplication. How should I reference this? Should I have to use file:// or http://?
Looking forward for your help
Thanks in advance

There is a method in ServletContext: getRealPath.
http://java.sun.com/j2ee/1.4/docs/api/javax/servlet/ServletContext.html
It turns a website relative path into a real location on disk.
// only need this line in a servlet. "application" is already defined in a jsp
ServletContext application = getServletConfig().getServletContext();
String filePath = application.getRealPath("/tempDir");
File f1 = new File(filePath);Some issues with using this approach:
If your application is in an unexploded WAR file, then getRealPath() can return null, as there isn't really a location on disk that it relates to.

Directory Listing

Hi All,
I want to beable to display a directory listing in a JSP page, like filename and if possible size and creation date.
I found this example :
http://forum.java.sun.com/thread.jspa?forumID=45&threadID=271208
But it doesn't do much. This example show how many files it's found but
doesn't show them.
Any other examples?
Thanks!

All you need is the File class. Check out the api docs (java.io.File), and more specifically the listFiles() method.

Directory lister for the web.

Hi
Here iam attaching my project code for my particualr aplication
The source code for a directory lister for the web. You give it
one or more URLs as arguments and its not displays the formatted results .. can any body will help me
import java.util.*;
import java.net.*;
import java.io.*;
public class WebList extends abcd.Application
static final String progName = "WebList";
public static void main( String[] args )
(new WebList()).compat( args );
public int newMain( String[] args )
int argc = args.length;
if ( argc == 0 )
usage();
return -1;
for ( int argn = 0; argn < argc; argn++ )
if ( argc > 1 )
if ( argn > 0 )
out.println( "" );
out.println( args[argn] + ":" );
list( args[argn] );
return 0;
private void usage()
err.println( "usage: " + progName + " URL ..." );
void list( String urlStr )
String base = abcd.Utils.baseUrlStr( urlStr );
Enumeration as;
try
as = new abcd.Spider( urlStr, err );
catch ( MalformedURLException e )
err.println( e );
return;
while ( as.hasMoreElements() )
URLConnection uc = as.nextElement();
if ( uc == null )
continue;
URL thisUrl = uc.getURL();
String thisUrlStr = thisUrl.toExternalForm();
if ( thisUrlStr.startsWith( base ) )
thisUrlStr = thisUrlStr.substring( base.length() );
if ( thisUrlStr.length() == 0 )
thisUrlStr = ".";
String mimeType = uc.getContentType();
int len = uc.getContentLength();
long mod = uc.getLastModified();
Date modDate = new Date( mod );
String modDateStr = abcd.Utils.lsDateStr( modDate );
out.println(
abcd.Fmt.fmt( mimeType, 14, abcd.Fmt.LJ ) + " " +
abcd.Fmt.fmt( len, 8 ) + " " +
modDateStr + " " + thisUrlStr );
try
InputStream in = uc.getInputStream();
in.close();
catch ( IOException e ) {}
}

Hi,
It is enumerating the files reachable at or
below those URLs, i hope it will full fill your application requirements.
and also in the for loop you have to do pre increment not post increment so it may be the casue for entier your logic ..
as per my knowledge iam changing the code .. i hope it will work for your application...
still if you have any querys please post me with details of your projects so that i can help you more..
here is modified code:
=================
import java.util.*;
import java.net.*;
import java.io.*;
public class WebList extends abcd.Application
static final String progName = "WebList";
public static void main( String[] args )
(new WebList()).compat( args );
public int newMain( String[] args )
int argc = args.length;
if ( argc == 0 )
usage();
return -1;
for ( int argn = 0; argn < argc; ++argn )
if ( argc > 1 )
if ( argn > 0 )
out.println( "" );
out.println( args[argn] + ":" );
list( args[argn] );
return 0;
private void usage()
err.println( "usage: " + progName + " URL ..." );
void list( String urlStr )
String base = abcd.Utils.baseUrlStr( urlStr );
Enumeration as;
try
as = new abcd.Spider( urlStr, err );
catch ( MalformedURLException e )
err.println( e );
return;
while ( as.hasMoreElements() )
URLConnection uc = (URLConnection) as.nextElement();
if ( uc == null )
continue;
URL thisUrl = uc.getURL();
String thisUrlStr = thisUrl.toExternalForm();
if ( thisUrlStr.startsWith( base ) )
thisUrlStr = thisUrlStr.substring( base.length() );
if ( thisUrlStr.length() == 0 )
thisUrlStr = ".";
String mimeType = uc.getContentType();
int len = uc.getContentLength();
long mod = uc.getLastModified();
Date modDate = new Date( mod );
String modDateStr = abcd.Utils.lsDateStr( modDate );
out.println(
abcd.Fmt.fmt( mimeType, 14, abcd.Fmt.LJ ) + " " +
abcd.Fmt.fmt( len, 8 ) + " " +
modDateStr + " " + thisUrlStr );
try
InputStream in = uc.getInputStream();
in.close();
catch ( IOException e ) {}
Regards,
TirumalaRao.
Developer Technical support,
sun MicroSystem, India.

Directory monitor in Java, help

Hey everyone,
I'm attempting to write a directory monitor in java but I'm stuck. I'm trying to find something in Java that is like FileSystemWatcher in .NET but I don't think java does. From what I read is that you have to continually poll the directory for changes. What I would like to know is that are there any events and/or signals raised when a changes are made so that one could catch and process them? If not, could someone explain how to simply poll the directory for changes?
Thanks
Barefoot

barefootsanders wrote:
This is exactly what I need to do. Now, i already have been working on the last modified time comparison which is relatively simple. What I was stuck on was finding what was different between the two file lists. Would I have to iterate through the entirety of the list and compare each item to find what was different or is there a more efficient way of doing this?The simplest thing to do would be to use Collection's removeAll method to get the difference between the two. This will show you which files have been added (using newList.removeAll(oldList)) and which have been removed (using oldList.removeAll(newList)).
A few notes:
* removeAll modifies the collection on which you call it, so you'll need to make copies.
* File's equals method docs say: Returns true if and only if the argument is not null and is an abstract pathname that denotes the same file or directory as this abstract pathname. Whether or not two abstract pathnames are equal depends upon the underlying system. On UNIX systems, alphabetic case is significant in comparing pathnames; on Microsoft Windows systems it is not.
So you'll need to decide if that's good enough, or if you want to implement your own comparison for files. Also, it's not clear from the above how shortcuts or symbolic links are handled--whether the shortcut and the original are considered equal or not.
* Based on the above, you may get different results with a List vs. a Set, so play around and see which one better suits your needs.
* I think a directory's mod time only changes if you add or remove or rename files, or explicitly change it, as with the touch command in unix. I don't think modifying the contents of an existing directory cause that directory's mod time to be updated. If you want to know when a file has changed, you'll probably have to poll that file's mod time explicitly.
In light of the above, I suggest you start by writing a small program that does nothing but poll a directory every, say, 5 or 10 or 30 seconds and print out whether it's changed or not. Then, while that program is running, do various things like add, delete, rename, rename with same letters but different case, etc. and see if the program gives you the results you want. If not, you'll have to tweak it based on your findings.

Directory Listing Using Weblogic Server

Hi all,
I need to be able to browse few directories via web page using Weblogic as WebServer ( on Linux RedHat 5.0)
for example the directory to be browsed are:
/home/oracle/swift
/home/oracle/payables
Please let me know how I can achieve this !!
Thanks
KS

maybe it's a bit overkill to use the JCA File Adapter
http://docs.oracle.com/cd/E21764_01/integration.1111/e10231/adptr_file.htm#BABFGIEJ
which has a "directory listing" feature
but I think it's not very recommended to use directly the java.io.File class to perform this operation...
any other thoughts?

How to disable the Directory listing for the whole server or a particular a

Please let me know how to disable the Directory listing for the whole server or a particular application.
Thank You

I want to disable the tab focusing( tab index) for a JTextField objectsLook through the API and find methods with the word "focus" in the method name.
Also can u tell me about how to change the tab index orders for JTextFields."How to Use the Focus Sub System":
http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html

Overriding Tomcat's directory listing

I made my own directory listing JSP which includes thumbnails of pictures. Right now I have to copy the file, index.jsp, into every directory to make it the directory listing. How can I stop this?

It doesn't seem to be working, but I suspect it is a newbie error on my part. Here' s my server.xml (I tried it as shown below, in my apps-project.xml file, and outside the <server> key:
<?xml version="1.0" encoding="ISO-8859-1"?>
<Server>
    
    <ContextManager workDir="work" >
<StaticInterceptor listing="false" />
      
        <LoaderInterceptor11 useApplicationLoader="true" />
        <TrustedLoader />
        <LogSetter name="tc_log" timestamps="true"
             verbosityLevel="INFORMATION" />
        <LogEvents enabled="false" />
        
        <ContextXmlReader config="conf/server.xml" />
        
        <ContextXmlReader config="conf/apps.xml" />
        <AutoDeploy source="modules" target="modules"
              redeploy="true" />
        <AutoWebApp dir="modules" host="DEFAULT" trusted="true"/>
        <AutoDeploy source="webapps" target="webapps" />
        <AutoWebApp dir="webapps" host="DEFAULT" />
        <PolicyLoader securityManagerClass="java.lang.SecurityManager"
                policyFile="conf/tomcat.policy" />
        <SimpleMapper1 />
        <SessionExpirer checkInterval="60" />
        
        <SessionIdGenerator randomClass="java.security.SecureRandom"
                            randomFile="/dev/urandom" />
        
        
        <LogSetter name="servlet_log"
             timestamps="true"
             verbosityLevel = "INFORMATION"
             path="logs/servlet-${yyyyMMdd}.log"
             />
        <LogSetter name="JASPER_LOG"
             timestamps="true"
             path="logs/jasper-${yyyyMMdd}.log"
             verbosityLevel = "INFORMATION" />
        <WebXmlReader validate="true" />
        <ErrorHandler showDebugInfo="true" />
        <WorkDirSetup cleanWorkDir="false" />
        <Jdk12Interceptor />
        
        <InvokerInterceptor />
        
        <JspInterceptor keepGenerated="true"
               largeFile="false"
               useJspServlet="false"
               />
        <StaticInterceptor listings="true" />
        <ReloadInterceptor fullReload="true" />
        <SimpleSessionStore maxActiveSessions="-1" />
        <AccessInterceptor />
        <CredentialsInterceptor />
        <SimpleRealm filename="conf/users/global-users.xml" />
       
        
        <LoadOnStartupInterceptor />
        <Servlet22Interceptor />
        
        
        
        <DecodeInterceptor />
        <SessionId cookiesFirst="true" noCookies="false" />
        
        <ApacheConfig noRoot="true" />
        <IISConfig noRoot="true" />
        <NSConfig noRoot="true" />
         
      
       
        <Http10Connector   port="8080"
                  secure="false"
                  maxThreads="100"
                  maxSpareThreads="50"
                  minSpareThreads="10" />
        
        
        
        <JniConnector />
        
        <Ajp12Connector      port="8007" />
        
        <Ajp13Connector port="8009" />
      
    </ContextManager>
</Server>

Get directory listing or files contained in a folder which is placed on a s

Hello,
I want to get the directory listing of a particular folder say 'xyz' which is placed on the server.
I am using tomcat. I want to use Http to do it. How do it do it.
Please guide.
Regards,
JAVA_student

JAVA_student ,
as pointed out file list is (in productional environments) usually turned off for security reasons.
But I had a similiar requirement to the one you posted. I had a directory with thousands of image files with the name pattern <id>.jpg and the id's stored in a database. Not for every id in the database there existed a file. I wanted to show an image or in case the image file did not exist a default jpg. I could not set the error pages in web.xml to do it.
So I had to take the id (a parameter in the request to the servlet I wrote for that), had to concat it with the 'virtual' directory name used in the applicationserver for the img directory. Then I had to check the existance of the file and to load it it and display it, if it existed otherwise I had to load and display the default picture.
The problem is similiar to yours as the problem basically is to map a directory in a web application to a real directory in a filesystem (which works for files and directories.
The answer is use getRealPath(String) of the ServletContext-object.
Note: This only allows access to files and directories in the web application.
e.g.
http://www.theserver.com/mywebapp/img/ is a folder containing img files. The server does not allow directory listing.
In a jsp within the application mywebapp you want to show a list of the files in /mywebapp/img/ .
<HTML>
<BODY>
<%
// in a jsp application gives you access to the context
String sRealPath = application.getRealPath("/img") ;
java.io.File fDir = new java.io.File(sRealPath) ;
java.io.File[] allFiles = fDir.listFiles() ;
for (int i = 0 ; i < allFiles.length;i++) {
String sName = allFiles.getName() ;
%>
<%=sName%><br>
<%
%>
</BODY>
</HTML>

Very slow network directory listing - but fast data transfer speed once listed?

Hello,
I have really tried to sort this myself before opening up to the community, however I have run out of ideas, and hope someone can offer the magic solution I have missed.
I am currently using the 3.4ghz i7 iMac on a 1GB LAN, running OSX10.7.2 - connecting to a Windows Server 2008 (Running Release 2) over ethernet.
If i go to a network directory that i haven't recently accessed it can take up to 60 seconds to show the contents of that directory. Once i have accessed that folder, if i come out of it and go back in it will be instant again - but the first time it lists the directory it looks like i have opened an empty folder - which after anything from 10seconds to 1 minute will suddenly show the files that are there.
Internet connectivity is fast through the network, and file transfers across the LAN are fast. (showing as approx 300mb per second) I can play and edit HD content across the network with no slowdown so I am confident that this issue is not related to the network speed itself, and is more to do with a setting on this mac.
Symptoms are very similar to this post: https://discussions.apple.com/message/12245148?messageID=12245148&amp%3b#1224514 8 - however i understand that in OSX Lion - SMB was removed - so i cannot find this file to edit.
I have tried bypassing additional hubs in the network by wiring direct cables to the switch that is connected to the file server, this made no difference.
I have also tried disconnecting the ethernet cable, and running over wifi. This fixes the listing problem, but when editing HD content over a network drive, this connection is not fast enough to carry the data without interruption (some projects are linked to up to 900gb of hd video content!)
Using ethernet, I have tried DHCP, DHCP with manual address, and manual mode. All reproduce this problem. i have tried using the windows workgroup, and tried without it.
I have also followed this suggestion: https://discussions.apple.com/thread/2134936?threadID=2134936&tstart=45 and used OpenDNS. this did not fix the issue.
For argument sake, I have also just tested a Macbook Pro running Snow Leopard to see if it was OS related. This reproduces the exact same problem, near instant directory listing on the wifi, a long and arduous wait on ethernet.
I cannot work out why directory listing is instant over wifi, but not over ethernet on 2 different macs, running 2 different versions of OSX. I also do not understand why if the network is having trouble listing the directories - the data transfer speed is 300mbps when i copy files across the wired network from the file server to the mac.
Does anyone have any other ideas as to what could be the problem here? We are about to start work on a very large project, where the content we are editing is spread out across around 200 different network folders (different shoots captured over the past 2 years). We really don't have the time to wait 60 seconds each time we need to access one of those directories to look for a file, and I am very close to pulling all my hair out!
I really look forward to hearing from anyone who can offer any insight.

If you are suspecting that the Windows update had something to do with your LAN going slow, then try the following:
1. Look for updates for your clients LAN NIC driver; or
2. Un-install the updates.

Finding the directory path in java

I need to check if a file exists or not before an action is taken. I used File class to get the handle of a file and and then used exist() function to check if it is there. But this function needs to full path to that file. I need to find a directory path at runtime as the application is deployed in different environment and wouldn't know the directory path in each environment. Could somebody help me on this. Thanks,

fBut this function
needs to full path to that file. I need to find a
directory path at runtime as the application is
deployed in different environment and wouldn't know
the directory path in each environment. Well, that can only you know where this file is on the different platforms. So maybee you can provide it as a user-input, a parameter to the program or be set in a settings-file which the program reads.
If you want the full path to the current directory where the java program runs, this works:
File f=...;
String absPath=f.getAbsolutePath();
File absPathFile=new File(absPath);Gil

Directory Listing in Java

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