What is the process of accessing a file from a JSP page?

I have a collection of PDF files saved in a local directory on D:/filesDir/. I am looking to showcase all the files from that folder on my JSP page. When a user clicks on a specific PDF file, it should directly open the corresponding file located in D:/filesDir/. Currently, this is how my code looks:

<% 
String sourceDirectory = "D:\\filesDir\\";
File f = new File(sourceDirectory);
String [] fileNames = f.list();
File [] fileObjects= f.listFiles();
%>
<UL>
<%
for (int i = 0; i < fileObjects.length; i++) {
if(!fileObjects[i].isDirectory()){
%>
<LI>
<A HREF="<%="D:/filesDir/"+fileNames[i] %>"><%= fileNames[i]%></A> 
&nbsp;&nbsp;&nbsp;&nbsp;
(<%= Long.toString(fileObjects[i].length()) %> bytes long)
<%
}
}
%>
</UL>

Although I can display all my PDF files from the filesDir folder on my JSP page with the above code, when a user clicks on a specific PDF file like abc.pdf, instead of opening D:/filesDir/abc.pdf, it redirects to localhost:8080/myapp/D:/filesDir/abc.pdf...

Is there a way to remove the application-specific path (localhost:8080/myapp/) and open the PDF file directly from the link?

javajavascriptfilejsp

Answer №1

If you're not working on a school assignment or practice exercise, I recommend exploring an already available solution. Personally, I have found the FileManager plugin for CKEditor to be incredibly useful for browsing files on the server as a standalone solution:

Check out the home page here:

You can also access the source code at this link: https://github.com/simogeo/Filemanager/tree/master/connectors/jsp

Adapting it to fit into existing apps is quite simple. Just download the plugin, make adjustments in the filemanager.config.js file, and you're good to go!

Answer №2

To resolve the issue, update the hyperlink line as follows:

<a href="<%="file://D:/webDirectory/"+fileNames[i] %>"><%= fileNames[i]%></a>

However, if you want the files to be accessible on systems other than the server itself, it is recommended to move your file to the web directory and use a relative path for access.

Answer №3

Check out this code snippet for displaying file objects in a directory using Java.

<%@page import="java.io.File"%>
<html>
<body>
    <%
        String dirPath = "D:\\documents";
        File directory = new File(dirPath);     
        File[] files = directory.listFiles();
    %>
    <UL>
        <%
            for (int i = 0; i < files.length; i++)
            {
                if (!files[i].isDirectory())
                {%>
                    <LI><A HREF="file:\\\<%=files[i].getAbsolutePath()%>"><%=files[i].getName()%></A>
                        &nbsp;&nbsp;&nbsp;&nbsp; 
                        (<%=Long.toString(files[i].length())%> bytes long) 
                <%}
            }%>
    </UL>
</body>
</html>

Answer №4

<%@ page import="java.io.*"%>
<%
FileOutputStream output; 
try{
output = new FileOutputStream("C://Greetings.txt");
new PrintStream(output).println ("Not everything that shines is gold");
output.close(); 
}
catch (IOException exception){
output.println ("Could not write to file");
}
%>

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