Download local file using Servlet and JSP

Hello,
I will like to use a browser to download file on local system using serlvet and Jsp technology. Does anyone have any idea how to do it?
Any comment will be appreciate.
Thanks

Well you can just put the file in a folder that is accessible to the web server. Then have a link point to that file. That will cause the web browser to download the file.
hattan

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File download using servlet and jsp. File Dialog comes twice

Hi
I was trying to download a file using servlet. There is a link which calls the servlet. When I click on the link file dialog box comes up. On selecting Open it again shows me the file dialog box. I changed the method from POST to GET and it worked properly.
My question is why does it work with GET and not with POST. I am aware of the differences between POST and GET but am not able to come to a rational explanation for this behaviour.
Please if anyone can explain this to me I am going crazy thinking an answer for this.
Thank you.
Regards
Jay

Hi Jay,
I also have the same question. Why does it work with GET and not for POST?. If you were able to find the answer please let me know.
Thank you.
Regards,
Aravind

URGENT.........File Upload using Servlets and jsp

I am a new servlet programmer.......
iam using tomcat server......
can any one pls help in writing code for file upload using servlets and jsp without using multipart class or any other class like that....
Please URGENT..

Slow down! "Urgent" is from your perspective alone. I, myself, am not troubled or worried in the least.
hi ugniss
thanks for ur reply....sorry i was not
y i was not asked not to use multipart class or any
other class like that...is there any other
possibility to do file uploading from jsp to
servlet...
Just as an aside, a JSP is a Servlet. But even if I move beyond that, the question does not make sense. If you want a "JSP to upload to a Servlet", then simply do so in memory. You are still (likely) within the same scope of a given request. However, if instead you are referring to a JSP that is displayed on a browser, then really you are talking about HTML, which is what the browser will receive. And since you are now talking about a browser, your only real, viable option is a multi-part file upload. So, it is either server or it is browser. And either way, the question leads to very established options, as outlined above.
the main concept is.. in the browser the user selects
a particular file and clicks the button upload..after
clicking upload the jsp should sent the file to the
servlet in streams...there the servlet gets in and
saves in a server location........this is wat i hav
to do...
Okay. So, after reading my previous (redundant) paragraph, we have arrived at the crux of the issue. You have a JSP that will be output as HTML to a client (browser) which you want to upload content to your server (handled by a Servlet). So, you are now stuck again with multi-part. The requirement to not use multi-part is non-sensical. You can overcome it, say, if you write your own applet or standalone Swing client. However, if your users are invoking this functionality from a browser, you are limited by the options that W3C has provided you. Use multi-part.
is there aby possibilty to do this.....can any one
pls help....Take the advice to download and review Jakarta Commons FileUpload. Inform your management that their requirement makes no technical sense. Research on your own. There are dozens of examples (and tutorials) on file upload using multi-part. Embrace it. Live it. Love it.
- Saish

Download a file using servlet

Hi,
i need to download a file using servlet (jsp frontend) and if the download is successful, then a success message shud be displayed on the jsp.
i have tried it using MultipartResonse object and have been able to download the file. The problem is displaying the message on a jsp after download. After download if i use RequestDispatcher object to forward control to another jsp, it doesnt happen.
Can anyone help me with this?

Hi,
You can check :-
http://www.servletsuite.com/servlets/download.htm
Best of luck.
R S

User Authentication using Servlet and JSp

Hi,
I am developing a web app where i need to implement user Authentication to allow members to view and upload files on a certain directory say /data
For this i am using a servlet as a controller which then forwads request to other jsps/servlets based on user response. I tried using servlet mapping in web.xml so that all browser requests would be directed to controller servlet and would branch from there on. However the problem all RequestDispatcher.forward() requests redirected to the servlet putting it in a loop.
Is there another way to achieve this. (Apart from using form-based Basic Authentication).
I am using Resin 1.2.8 servlet/jsp container.
Any response as soon as possible would be appreciated.
Thanks,
Kushagra

RequestDispatcher.forward() cause the HTTP request to be sent through the request processing flow as if the original request for the resource being forwarded to.
It seems the servlet mapping you are talking about in web.xml should be made more specific. i.e. the mapping should be such that only your so called controller servlet will match up.
You might want to specify the mapping for the controller servlet to be noticeably/effectively different from the mapping for other servlets and JSPs.

How to download a file using servlet

I have a problem about downloading a file using a servlet.
Anybody can help me?
Thanks

I am assuming that you want to write a servlet that, when invoked by a user (for instance, through a URL link), will download a file using the "save as" dialog (on Windows, for example) in the user's browser.
In such a case, all you need to do is get the OutputStream from the response object, set the proper MIME type header, and write the file. Here is an (untested, not even compiled) skeleton.
public class MyServlet extends HttpServlet {
protected void doGet (HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
ServletOutputStream out = resp.getOutputStream ();
resp.setContentType ("application/x-foobar");
while (/* whatever */) {
In this loop, you generate your "file's" data.
You can compute it on the fly, pull it from a database,
read it from a "real" file, or any other means you can dream up.
The sample line below just writes some of the data (for example,
a byte array) to the user's browser via the output stream out.
out.write (data);
out.flush ();
Go to http://java.sun.com/j2ee/sdk_1.3/techdocs/api/index.html
for the JavaDoc on the classes used.
Cheers!
Jerry Oberle

When to use servlets and jsp in an application like shoping cart?

Hi All
I m going to design and implement a web application using servelts and jsp. I am still at its requirements analyze stage.
The application is almost likely a shopping cart. So if any of you have the deep knowledge about this domain with servlets and jsp please help me for a good design. What I realy need to know is that
1. what are the core requirements for a shoping cart ?
2. use cases ?
3. best way to follow mvc with servlets and jsp for it?
you can answer to this at the abstract level. no need to go in detail.
if you have any documents like design and use cases mail me to [email protected]
your cooperation is highly appreciated in this regards.

Look into this kid
http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/Servlet-Tutorial-Session-Tracking.htm

How to use servlets and JSP for my homepage?

servlets and JSP are server-side program. If my homepage is on some web-hosting websites, can I upload the servlets and JSP to run it? if possible, where can I find such a web-hosting place?
sraiper

Not many hosts offer JSP or Servlet support (and some do but then stop and never give you a refund, grrrrrrr!!!!).
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Here is a list of hosts that support Java:
http://www.thejspbook.com/resources/category.jsp?id=1005&name=JSP+web+hosting
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Help needed saving excel file using servlet and mailing it as attachment

Hi,
I have to enhance an existing application in which (in jsp) using response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment=inline");
and stuff ..
we are asking user to view or save the file. But now i have to write code to save that xls, and send it as an attachment to other users of the application.
I am new to this plz help me out
Thanks in advance
Regards
Aashi

Hi Orlando,
convert content to Hex format then,
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Anil

How can i upload files in servlets and also using jsp

means that uploading files(.doc) or any files by using servlets and jsps

yawmark wrote:
saichand wrote:
means that uploading files(.doc) or any files by using servlets and jsps
[http://www.google.com/search?q=How+can+i+upload+files+in+servlets+and+also+using+jsp]
~Good topic titles are indeed brilliant search keywords. It's sad to see that it won't even come in the mind of the topicstarters to Google it before posting the topic.

Servlet and JSP in OAS

I'm developing web application with OAS
4.0.8.1 and JDeveloper 3.0 and I want to call
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I downloaded JSP for OAS from www.olab.com.
In the Release note, there is a description
about RequestDispatcher, but I cannot
understand about details.
In what configuration can I use servlet and
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scceeded about that?
null

wan (guest) wrote:
: Hi everyone,
: I am using OAS 4.0.8 on Solaris 2.6. After viewing servlet
: and JSP samples, I am kind of confuse whether OAS supports the
: following options
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: 3. running JDeveloper DB Servlet wizard
: (oracle.jdeveloper.servlet.*) and Java Business Objects
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I found a white paper 408newfead.pdf, that says under "Future
Directions" that it will add jsp support. I read somewhere (I
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support
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is consistent with the technology they are touting as the
future.
Having us download Suns server to run servlets and JSP is
ridiculous for the worlds second largest software company!
null

How to read a file using servlet

hi ,
i've to read a file using servlet ,
should read the file using servlet and display it in JSP,Could anybody get me how can i do it .
Shiva

To do that you need to get the response output stream and write yur file contents to that.
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sos.write(bytes from your file input stream);
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Creating FOrums with Servlet and JSP

Hi everyone,
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Regards,
Basil Mahdi

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Let me tell you right now, you have BORING nightmares.

I can not download any files using Safari ? when I choose to download application file the URL include the file name and stop responding. Any help??

I can not download any files using Safari ? when I choose to download application file the URL include the file name and stop responding. Any help??

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. For instructions, launch the System Preferences application, select Help from the menu bar, and enter “Set up a guest account” (without the quotes) in the search box.
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem(s)?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault in Mac OS X 10.7 or later, then you can’t enable the Guest account. The Guest login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
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*Note: If FileVault is enabled under Mac OS X 10.7 or later, you can’t boot in safe mode.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.

Download local file using Servlet and JSP

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