How to get the right file name in an attachment

Question

I have design a program to get the attach file from an attachment. But when I click the link to save the file, the default name of the file is 'attach' whenever I get different files. Who know what is the problem, please tell me the truth.
Here are some codes of the program.
download.jsp
<%="test.doc"%>
web.xml
<servlet-mapping>
<servlet-name>AttachmentServlet</servlet-name>
<url-pattern>attachment</url-pattern>
</servlet-mapping>
AttachmentServlet.java
public void doGet
Message msg = folder.getMessage(msgNum);
// the message I get is right and the name of the file in
// the attach in this message is right too.(I have printed)
Multipart multipart = (Multipart)msg.getContent();
Part part = multipart.getBodyPart(partNum);
ContentType ct = new ContentType(sct);
response.setContentType(ct.getBaseType());
InputStream is = part.getInputStream();
int i;
while ((i = is.read()) != -1) {
out.write(i);
out.flush();
out.close();

Answer 1

The trick that I used is to append the URL with the name of the file. So if your url is "http://domain.com/attach", use "http://domain.com/attach/filename.doc". IE and Netscape parse the URL to determine what the filename is, so by placing this text at the end, you essentially let the browsers know what the filename is. :)
I have design a program to get the attach file from an
attachment. But when I click the link to save the
file, the default name of the file is 'attach'
whenever I get different files. Who know what is the
problem, please tell me the truth.
Here are some codes of the program.<< snip >>