Download File from the server

[ersachinjain]

Hi

I want to write a function in applet which download the excel file from the web server when a button is pressed. I am using a client server architecture in my application.

[Eranga]

This is a forum, not a place to get your work done. So you MUST put some effort first of all. If you stuck on something then ask it here more clearly.

[ersachinjain]

Hi

I actually did try and I am not getting my work done here. I converted a JTable to an excel file on the web server. But now I want to download that file from the server on the local system where the program is running on the server. I would really appreciate the help.

[gcalvin]

Show us what you tried, and tell us how it is failing.

-Gary-

[ersachinjain]

Ftp ftp = new Ftp();

ftp.setLocalDir(new File("C:\\"));
ftp.setDir("/export/home/project/public_html/meriproject");
ftp.setBinary();
ftp.upload(new File("/export/home0/project/meriproject2"));
ftp.download("results.xls");

I am using a class FTP which I have imported using a jar file. Now the thing is that this would be used when I am trying to access the the server from a local system. But its the other way around I am trying to dowanload the file from the server to the local system and the code is running on the server.

[gcalvin]

Ftp ftp = new Ftp();

ftp.setLocalDir(new File("C:\\"));
ftp.setDir("/export/home/project/public_html/meriproject");
ftp.setBinary();
ftp.upload(new File("/export/home0/project/meriproject2"));
ftp.download("results.xls");

I am using a class FTP which I have imported using a jar file. Now the thing is that this would be used when I am trying to access the the server from a local system. But its the other way around I am trying to dowanload the file from the server to the local system and the code is running on the server.

Java can't do that (and we wouldn't want it to). Code running on a server can't arbitrarily write files on a client's file system. The client needs to download the file. In this case, it sounds like the client is a web browser, so you either just display a hyperlink and let the user click on it, or you try to automate it with JavaScript (which is not Java, and is outside the scope of this forum).

-Gary-

[ersachinjain]

So you mean there is no way a file can be downloaded on the clients machine. I know that is one of the mail restrictions in applet, but there has to be some way of downloading the file on the system.

[gcalvin]

Sure a file can be downloaded, but a server can't make it happen. It has to be done by a client. And if the client is a web browser, that means either the user does it by clicking a link, or it's done in JavaScript.

-Gary-

[gcalvin]

Sorry -- you did say applet, and it is possible for an applet to write to the local file system, as long as it's signed code or uses JNLP.

JNLP API (The Java™ Tutorials > Deployment > Doing More With Rich Internet Applications)

-Gary-

[Eranga]

So you mean there is no way a file can be downloaded on the clients machine. I know that is one of the mail restrictions in applet, but there has to be some way of downloading the file on the system.

You can download files, sure. But you cannot do that in a server. Say you login to the server and try to download a file, then that end works as a client. If you want to download from someone else machine, then your end should work as a client. Server cannot do that.

[Eranga]

Search on our forum. You can fine lots of related stuff for file downloading using Java.