Program needed to sort the table chronologically which is generated dynamically

Columns are generated dynamically. They do not contain any dates.
They contain tags like 1b for 1 business day and 2b for 2 business
days, 1m for 1 month , 2y for 2 yrs etc... That will be a part of the
column name and not the full column name.
I need to sort that in the chronological order as 1b,2b, 1m, 2m, 3m,
1y,2y,etc... How to do that in JSP?

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