apache - How to gzip file in place replacement Java -

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i have .xlsx file (or file) gzip. able gzip file have problem of trying in place. meaning replace original file gzipped version of file.

here code:

public static void main(string[] args) throws ioexception {      file file = new file("test.xlsx");     file gfile = new file(file.getabsolutepath()+".gz");      if(!file.exists()) {         system.err.println("input tax file did not exist!");     }      fileinputstream fis = new fileinputstream(file);     fileoutputstream fos = new fileoutputstream(gfile);     gzipoutputstream gos = new gzipoutputstream(fos);     gzipreplace(fis, gos); }    private static void gzipreplace(inputstream is, outputstream os) {     int onebyte;     try {         while( (onebyte = is.read()) != -1 ) {             os.write(onebyte);         }         os.close();         is.close();     } catch (exception e){         system.err.println(e.getstacktrace());     } }

how can in-place replacement of uncompressed file gzipped one?

just use file.delete() on original file after successful compression , writing of gzip file.

you must careful not delete original file until new compressed file written , closed. otherwise setting lose data.


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