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

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

 
It is sorta covered in the JavaRanch Style Guide.
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