Printing Jasper report data in matrix format

Answer 1

Not exactly sure i got you, but here:

In the crosstab properties

• in Row group add a new group, with Bucket Expression
  ($F{REPORT_COUNT}/3)+1
• in Column group add a new group, with Bucket Expression
  ($F{REPORT_COUNT}%3)+1

In this was, a new row will be started every 3 records, and every row will contain only 3 columns.