1 Reply Latest reply on Jun 25, 2010 6:46 AM by jaikiran pai

    file upload using apache fileupload library

    Jeong-hoon Kang Newbie
      the source below prints
      size 0
      I don't know why this gives size 0.
      I spent lots of time to solve this problem.
      Still don't have idea.
      Help me please.
      I use apache fileupload 1.2.1, on jboss 5.0.

      =============================== file.html ===============================
      <form action="http://100.100.100.100:8088/dmb/servlet/UploadServlet" name="frm" ENCTYPE='multipart/form-data'
      method='POST'>
      <input type="file" name="file1"/><input type="button" onclick="frm.submit()" value="submit" />
      </form>
      =============================== UploadServelt ===============================
      import java.io.*;
      import javax.servlet.http.*;
      import org.apache.commons.fileupload.*;
      import org.apache.commons.fileupload.disk.DiskFileItemFactory;
      import org.apache.commons.fileupload.servlet.ServletFileUpload;
      import java.util.*;
      public class UploadServlet extends HttpServlet {
      public void doGet(HttpServletRequest request, HttpServletResponse response) {
        service(request, response);
      }
      public void doPost(HttpServletRequest request, HttpServletResponse response) {
        service(request, response);
      }
      public void service(HttpServletRequest request, HttpServletResponse response) {
        try {
         // Check that we have a file upload request
         boolean isMultipart = ServletFileUpload.isMultipartContent(request);
         if (isMultipart) {
          // Create a factory for disk-based file items
          FileItemFactory factory = new DiskFileItemFactory();
          // Create a new file upload handler
          ServletFileUpload upload = new ServletFileUpload(factory);
          // Parse the request
          List /* FileItem */ items = upload.parseRequest(request);
          // Process the uploaded items
          Iterator iter = items.iterator();
          System.out.println(items.size()+" :::::size:::::");
          while (iter.hasNext()) {
           FileItem item = (FileItem) iter.next();
           if (item.isFormField()) {
            processFormField(item);
           } else {
            processUploadedFile(item);
           }
          }
         }
        }
        catch (Exception e) {
         e.printStackTrace();
        }
      }
      private void processFormField(FileItem item) {
        String name = item.getFieldName();
        String value = item.getString();
        System.out.println("Item name: " + name +  " value: " + value);
      }
      private void processUploadedFile(FileItem item) throws Exception {
        String fieldName = item.getFieldName();
        String fileName = item.getName();
        String contentType = item.getContentType();
        boolean isInMemory = item.isInMemory();
        long sizeInBytes = item.getSize();
        boolean writeToFile = true;
        if (sizeInBytes > (5 * 1024 * 1024)) {
         writeToFile = false;
        }
        // Process a file upload
        if (writeToFile) {
         File uploadedFile = new File("<directory on the server' file system>"+ fileName);
         if (!uploadedFile.exists()) {
          uploadedFile.createNewFile();
         }
         item.write(uploadedFile);
        }
        else {
         System.out.println("Trying to write a large file.");
        }
      }
      }