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Order of close() statements GZIP

bob connolly
Ranch Hand

Joined: Mar 10, 2004
Posts: 204

When i have the files nested this way, is there an order that the close statements should be in?

I keep getting a Corrupt GZIP trailer for some reason!

Thanks much!

GZIPInputStream in = null;
GZIPOutputStream gz = null;
PrintWriter outf = null;
byte[] buf=new byte[4096];

gz = new GZIPOutputStream(new FileOutputStream(xml_file));
outf = new PrintWriter (gz);
} catch ......

Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24195

The PrintWriter will line-buffer the output; the last line won't necessarily be sent along until you call flush() on the PrintWriter, or until you close it. So by closing the gzip stream first, you're actually closing it before all the data can be sent to it.

You actually only need to call close on the PrintWriter; it will call close on the gzip stream, which will in turn close the file stream, and everything will work fine.

[Jess in Action][AskingGoodQuestions]
I agree. Here's the link: http://aspose.com/file-tools
subject: Order of close() statements GZIP
jQuery in Action, 3rd edition