aspose file tools*
The moose likes Sockets and Internet Protocols and the fly likes How to download a csv file through java without using input and output streams Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Sockets and Internet Protocols
Bookmark "How to download a csv file through java without using input and output streams" Watch "How to download a csv file through java without using input and output streams" New topic
Author

How to download a csv file through java without using input and output streams

Mani Sing
Greenhorn

Joined: Jun 30, 2010
Posts: 7

HI

Please help me,
How can i download a csv file through java without using input and output stream.
I want to download a csv file with the headers and followed by data.
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19723
    
  20

This question is similar to "how do I read a file without accessing the disk". The answer is: you can't. You may be able to wrap the InputStream in a Reader (hint: our AccessingFileFormats FAQ has a few links to libraries for parsing CSV files; I personally recommend opencsv) but in the end you'll still need an InputStream.

In case you don't know, InputStreamReader is the class to use to turn any InputStream into a Reader. To read from a file you have two choices:
1) use a FileReader, if the default encoding works out for you.
2) use a FileInputStream wrapped in an InputStreamReader if you need to explicitly specify the encoding.


SCJP 1.4 - SCJP 6 - SCWCD 5 - OCEEJBD 6
How To Ask Questions How To Answer Questions
Mani Sing
Greenhorn

Joined: Jun 30, 2010
Posts: 7

Thanks Rob for the update....

Actually i juss want to download the csv file without using Streams at all. Basically it's a challenge question given by my Senior to me.
if any body can help it out please.

Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19723
    
  20

I doubt this is possible at all. I would really love to see the answer to this, if there is any.
dasiydee indhu
Greenhorn

Joined: Mar 31, 2011
Posts: 1
In case you don't know, InputStreamReader is the class to use to turn any InputStream into a Reader. To read from a file you have two choices:
1) use a FileReader, if the default encoding works out for you.
2) use a FileInputStream wrapped in an InputStreamReader if you need to explicitly specify the encoding.
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19723
    
  20

That's part of my post; is there a problem with that? Don't you understand it? Or did you just want to repeat the significance?
William Brogden
Author and all-around good cowpoke
Rancher

Joined: Mar 22, 2000
Posts: 12806
    
    5
I suppose you could cheat and use Java to exec a separate process to download the file - possibly with FTP.

Or maybe you could hide the use of streams with something like the java.net.URLConnection getContent() method. (I have not idea if that would work, just speculating)

Bill

 
wood burning stoves
 
subject: How to download a csv file through java without using input and output streams