Find + Grep

find . -name "*Extent.java" -exec echo "{}," \; -exec grep " CLASSNAME" '{}' > output.xml \;

This is search all the files ends with "Extent.java", print the name, then grep the line which contains "ClASSNAME", then put everything into output.xml

snippet of output.xml

/advising/src/com/dovetailsys/advising/Q5CNPBankRestrictionExtent.java,
    public static final String CLASSNAME = "CNPBankRestriction";

Unix Grep

grep "BusinessStatus" -B10 -A2 importList-Test.xml > output.xml

General meaning: get some stuff from importList-Test.xml, and put it into output.xml.

What stuff? lines which contain "BusinessStatus" + 10 lines before it + 2 lines after it.

This is very useful to extract certain patterned-contents from a large file.

find . -name "*Bean.java" -exec echo "==={}:" \; -exec grep "re\"DefaultDataSource\"" -B1 -A3 {} \;

find . -name "*Extent.java" -exec grep "CLASSNAME =" '{}' > output.xml \;