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Data validation in excel using poi

 
Greenhorn
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How to set data validation for a cell after exportig the excel using poi?
I want to set data format as date for a cell named created date.After downloading the excel when user tries to enter non-date input it should prompt for invalid format.
workaround:DVConstraint dvConstraint = DVConstraint.createDateConstraint(...) tried with this. but i'm not going to compare the dates but the datatype
 
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So you want to set the data type of a cell to contain a date? The POI site covers this: http://poi.apache.org/spreadsheet/quick-guide.html#CreateDateCells
 
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Tried out the mentioned example.It allows text too to be provide as input.Any workaround to validate date if the user enters text on that date field?
 
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