Nicole Swan

I have written the code to upload and download a file from an Oracle database. (After trying various 3rd party beans for this, I broke down and wrote the code myself using the MultipartParser in the com.oreilly.servlet package) One problem though, is that my code only seems to work for text files. I've read that you somehow have to use the file content-type to download different types of files correctly, but I'm not quite sure how or where to use that information.
Also, ultimately, I would like to have the filenames available listed as urls that when clicked would download the appropriate file and prompt the user to choose whether they want to open it from the current location or save it to disk (as is usually done with files in browsers). I have no idea how to do this. If anyone has any ideas, I would be very grateful for your help.
My code:
//To Upload public void upload(File file, int uniqueid){ String filename= file.getName(); int length = (int)file.length(); FileInputStream filestream = null; try{ filestream = new FileInputStream(file); Connection conn = connectToDB(); Statement stmt = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE); String query = "UPDATE assignment SET instructions_file = ?, instructions_filename = ? WHERE a_key = " + uniqueid; PreparedStatement ps = conn.prepareStatement(query); ps.setBinaryStream(1, filestream, length); ps.setString(2, filename); int rows = ps.executeUpdate(); ps.close(); filestream.close(); conn.close(); } catch (Exception e) { System.out.println(e); } } //To download public void download(int uniqueid) { try{ Connection conn = connectToDB(); Statement stmt = conn.createStatement(); String query = "SELECT instructions_file, instructions_filename FROM assignment WHERE a_key = " + uniqueid; ResultSet rs = stmt.executeQuery(query); if(rs.next()) { File blobFile = null; blobFile = new File(rs.getString("instructions_filename")); Blob blob = rs.getBlob("instructions_file"); InputStream in = blob.getBinaryStream(); int length = in.available(); byte[] blobBytes = new byte[ length ]; in.read( blobBytes ); FileOutputStream fos = new FileOutputStream(blobFile); fos.write( blobBytes ); fos.close(); rs.close(); stmt.close(); conn.close(); } } catch (Exception e) { System.out.println(e); } }
Thanks in advance!
--Nicole
[ July 26, 2002: Message edited by: Nicole Swan ]

Maybe check out http://www.coreservlets.com. This site has tutorials on JSP, servlets, and java beans as well as a good tutorial on setting up Tomcat.

I may be wrong, but doesn't Oracle require a date in a format similar to: 07-JUN-2002

I am currently starting/working on a project where I am using jsp/java to upload and download files. I have found beans for the upload/download, but here's my question. Does anyone have any arguments for using a file structure storage plan as opposed to using a database to store the files that are uploaded?
I would really like to hear any arguments one way or the other.
Thanks!
--Nicole

I received the same error when I installed Tomcat 4.0.3. It's caused by the JAVA_HOME env variable not being set.

I'm glad you got it to work. However, I don't know if updating your JDK version was the solution...I'm using JDK1.3.1. with Tomcat 4.0.3.