Question: how to export data from database to excel sheet in jsp?
Answer: excel.jsp: <%@page import=" java.io.*"%> <%@page import=" java.sql.*"%> <%@page import=" org.apache.poi.hssf.usermodel.HSSFSheet"%> ... 
readExcel.jsp: <%@page import="java.io.*"%> <%@page import="java.util.*"%> <%@page import=" org.apache.poi.hssf.usermodel.HSSFSheet"%> ... 
updateExcel.jsp: