Example with Grep4j 1.5 version (for jdk 1.5)

I need to find if any of several strings of my List exist in a List of files with extension .txt and .xml.

I have my own list of strings: "hello","goodbye","etc".

I need the list of files with "hello" or "goodbye" or "etc".

For example:

a.csv contains:
a|b|hello|d

b.xml contains:
<a>
 <b></b>
 <c>goodbye</c>
</a>

The List of files in this case are:

/path/folder1/a.csv
/path/folder2/b.xml