I need to develop a web application in java using net beans ide that reads both open office spread sheet data and excel spread sheet data that means it should read the data with xls,xlsx and ods extensions.I have an excel sheet with 13 columns which has date,names etc.my main requirement is to choose a file using file uploader and insert the data in database and display it in gridview after inserting.How can i do this i am very new to this can any one help me out