How to download binary file

[Jiri Nejedly]

I am trying to automatically download some zip file. I write this code

url = new URL("http://someaddress/file.zip");
conn = url.openConnection();
rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
FileWriter fout = new FileWriter("temp.zip");
while ((character = rd.read()) != -1) {
fout.write(character);
}
rd.close();
fout.flush();
fout.close();

To my surprise I found out, that my temp.zip file is always corrupted in this way: characters 90h, 98h, 83h, 81h, 88h (and maybe others) are replaced by character 3F. When downloading via browser, file is OK. I don't have the slightest idea why this happens.

Thanks in advance for any comments.

[Ulf Dittmer]

The various Reader and Writer classes are for character data. For binary data (like ZIP files) you need to use Stream classes.