Regular Expressions, Include & exclude files

[andreasviklund]

Hi!

I have a javaprogram that should read xml-files from a directory. The
program could contain several types of files but it should only read
files with a certain pattern.

The file names will look like this:

"resultset_27_23.xml"

where the numbers will change, but the rest of the file name is the
same (resultset_XX_XX.xml).

But in the same directory it will also be files with the following
pattern:

"resultset_27_23_attachment1.xml"

Here, the numbers could change in the in the same way as the files
above, and the number after the text (attachment) could also differ
from file to file.Those files should not be read by the program.

I have tried to write a regular expression pattern that only reads the
first file types, and exlcudes the other ones, but it won´t work.

Does anyone have a solution to my problem? It is possible to use either
just one pattern, or two patterns; one for the files that should be
included, and one for the files that should be excluded.

 

[Chris]

Hi!

I have a javaprogram that should read xml-files from a directory. The
program could contain several types of files but it should only read
files with a certain pattern.

The file names will look like this:

"resultset_27_23.xml"

where the numbers will change, but the rest of the file name is the
same (resultset_XX_XX.xml).

But in the same directory it will also be files with the following
pattern:

"resultset_27_23_attachment1.xml"

Here, the numbers could change in the in the same way as the files
above, and the number after the text (attachment) could also differ
from file to file.Those files should not be read by the program.

I have tried to write a regular expression pattern that only reads the
first file types, and exlcudes the other ones, but it won´t work.

Does anyone have a solution to my problem? It is possible to use either
just one pattern, or two patterns; one for the files that should be
included, and one for the files that should be excluded.

I haven't tried it, but this may work:

"resultset_\\d\\d_\\d\\d\\.xml";

\d represents a single digit. \. escapes the dot. All backslashes are
doubled up so they are treated as literals in a Java string.

 

[Alan Moore]

I haven't tried it, but this may work:

"resultset_\\d\\d_\\d\\d\\.xml";

\d represents a single digit. \. escapes the dot. All backslashes are
doubled up so they are treated as literals in a Java string.

That doesn't cover the longer format. This one does:

"resultset_\\d\\d_\\d\\d(?:_attachment\\d)\\.xml"