How do I set the folder for storing file uploads using Commons FileUpload

Question

How do I set to location of where to store file uploads on a TOMCAT server?

I am using commons.fileupload and as it stands I am able to store multiple .tmp files to catalina_base/temp however, my aim is to store the uploaded folders in their original form to d:\\dev\\uploadservlet\\web\\uploads

I know this question is vague but to be honest I've been working with servlets for such a short amount of time and I don't yet understand the big picture, any suggestions of code or links to tutorials would be greatly appreciated.

My servlet code which handles the uploads is as follows:

package test;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.oreilly.servlet.MultipartRequest;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class TestServlet extends HttpServlet {

private static final long serialVersionUID = 1L;    
    public static final long MAX_UPLOAD_IN_MEGS = 5;

public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    doPost(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();

            //This is the folder I want to use!!
            //String uploadFolder = "d:\\dev\\uploadservlet\\web\\uploads";

    boolean isMultipartContent = ServletFileUpload.isMultipartContent(request);
    if (!isMultipartContent) {
        out.println("Upload unsuccessful<br/>");
        return;
    }

    out.println("The following was uploaded:<br/>");

    FileItemFactory factory = new DiskFileItemFactory();     
    ServletFileUpload upload = new ServletFileUpload(factory);
    upload.setSizeMax(MAX_UPLOAD_IN_MEGS * 1024 * 1024);


    TestProgressListener testProgressListener = new TestProgressListener();
    upload.setProgressListener(testProgressListener);

    HttpSession session = request.getSession();
    session.setAttribute("testProgressListener", testProgressListener);

    try {
        List<FileItem> fields = upload.parseRequest(request);
        out.println("Number of fields: " + fields.size() + "<br/><br/>");
        Iterator<FileItem> it = fields.iterator();
        if (!it.hasNext()) {
            out.println("No fields found");
            return;
        }
        out.println("<table border=\"1\">");
        while (it.hasNext()) {
            out.println("<tr>");
            FileItem fileItem = it.next();
            boolean isFormField = fileItem.isFormField();
            if (isFormField) {
                out.println("<td>regular form field</td><td>FIELD NAME: " + fileItem.getFieldName() + 
                        "<br/>STRING: " + fileItem.getString()
                        );
                out.println("</td>");
            } else {
                out.println("<td>file form field</td><td>FIELDNAME: " + fileItem.getFieldName() +//                     <br/>STRING: " + fileItem.getString() +
                        "<br/>NAME: " + fileItem.getName() +
                        "<br/>CONTENT TYPE: " + fileItem.getContentType() +
                        "<br/>SIZE (BYTES): " + fileItem.getSize() +
                        "<br/>TO STRING: " + fileItem.toString()
                        );
                out.println("</td>");
            }
            out.println("</tr>");
        }
        out.println("</table>");
    } catch (FileUploadException e) {
        out.println("Error: " + e.getMessage());
        e.printStackTrace();
    }
}
}

...and it get's it's information from this HTML form:

<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Upload Page</title>


    <link rel="stylesheet" type="text/css" href="css/ui-lightness/jquery-ui-1.8.24.custom.css">
    <link rel="stylesheet" type="text/css" href="css/style.css"

    <script type="text/javascript" src="js/jquery.js"></script>
    <script type="text/javascript" src="js/jquery-ui.js"></script>
    <script type="text/javascript" src="uploadFunctions.js"></script>

</head>

<body>
    <div>
        <form name="uploadForm" id="uploadForm" action="test" method="post" enctype="multipart/form-data">
            <input type="hidden" name="hiddenfield1" value="ok">
            <h3>Files to upload:</h3>
            <input type="file" size="50" name="file1">
            <span id="file1Progress">-</span>
            <br/>
            <a href="javascript:previewFile(1)">Preview</a>
            <br/>
            <br/>

            <input type="file" size="50" name="file2">
            <span id="file2Progress">-</span>
            <br/>
            <a href="javascript:previewFile(2)">Preview</a>
            <br/>
            <br/>

            <input type="file" size="50" name="file3">
            <span id="file3Progress">-</span>
            <br/>
            <a href="javascript:previewFile(3)">Preview</a>
            <br/>
            <br/>

            <input type="file" size="50" name="file4">
            <span id="file4Progress">-</span>
            <br/>
            <a href="javascript:previewFile(4)">Preview</a>
            <br/>
            <br/>

            <input type="file" size="50" name="file5">
            <span id="file5Progress">-</span>
            <br/>
            <a href="javascript:previewFile(5)">Preview</a>
            <br/>
            <br/>
            <input type="button" value="Upload" id="submitButton" onclick="uploadForm.submit();doProgress();">
            <br/>
            <br/>
        </form>

        <div class="progBar">                
            File number: <span id="fileText">-</span> is being uploaded.<br/> 
            <br/>
            <progress id="progressBar" value="0" max="100"></progress><br/>
            Upload of all files is: <span id="progressText">-</span>% complete.<br/>
        </div>
    </div>
</body>
</html>

Answer 1

Have you seen javadoc of DiskFileItemFactory? There is a method setRepository which takes File argument (folder where temp files will be stored).

So try this:

    FileItemFactory factory = 
       new DiskFileItemFactory(DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD, 
                               new File("d:\\dev\\uploadservlet\\web\\uploads"));

And when you parsing form fields, you can save this files wherever you want.

Hope it will help you.