JSP Tutorial 4 : Creating Spreadsheets with JSP

In this program, we are going to create a new  excel sheet using java .
You can create any number of  new excel sheets in a excel file.

To create a excel sheet we can use third party APIs .
The name of this API is  POI.
This API is  provided by the Apache Jakarta(Jakarta POI - Java API To Access Microsoft Format Files ) Tomcat.
You can download POI.jar form  Apache Jakarta Project.It is open source.
OLE 2 compound Document Format is based on files including most Microsoft office files as XLS and DOC.
The package we need to import is java.io.InputStream, org.apache.poi.hssf.usermodel.HSSFSheet and org.apache.poi.hssf.usermodel. HSSFWorkbook.
The java.io.InputStream class is used to create file.
We are creating an excel file named "newrajesh.xls". The org.apache.poi.hssf.usermodel.
HSSFWorkbook class is used to create an object of  HSSFWorkbook, by which we will write our new rajesh.xls  file.
This object allows us to modify the excel file. The org.apache.poi.hssf.usermodel.HSSFSheet is used to create an object of sheet .
The org.apache.poi.hssf.usermodel.HSSFSheet is used to create a new sheet.
This class extends java.lang.Object. It is used to create a high level worksheet.

To create new sheet, we use HSSFSheet constructor in which we pass the name of the sheet as an  string argument.
We can create any number of sheets. As we are creating here six sheet as named  new sheet, second sheet ,third sheet ,fourth sheet, and fifth sheet.

Read the step by step tutorial :



You have to follow the following steps to execute this example:
Steps:

Download the POI.jar from   Apache Jakarta Project .
Extract it and then copy  poi-2.5.1-final-20040804.jar,poi-contrib-2.5.1-final-20040804.jar
and poi-scratchpad-2.5.1-final-20040804.jar into %<tomcat-home>%\common\lib directory .
copy the example below into C:\apache-tomcat-5.5.23\webapps\excel.
Start the web server.
Give a folder structure where the created excel files are to be saved. (Say: C:\spreadsheets)
To compile and run open Internet Explore and write http://localhost:8080/excel/excelPoi.jsp.
After pressing enter or on click Go. Output "Your file has been created succesfully" will be diplay on browser
The excel file will be generated into C:\spreadsheets folder.
The code of the program is given below:

<%@ page import="java.io.InputStream" %>
<%@ page import="org.apache.poi.hssf.usermodel.HSSFSheet"%>
<%@ page import="org.apache.poi.hssf.usermodel.HSSFWorkbook"%>
<%@ page contentType="application/vnd.ms-excel" %>
<%@ page import="java.io.*" %>
<%
        try {
           HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet1 = wb.createSheet("new sheet");
    HSSFSheet sheet2 = wb.createSheet("second sheet");
   HSSFSheet sheet3 = wb.createSheet("third sheet");
    HSSFSheet sheet4 = wb.createSheet("fourth sheet");
   HSSFSheet sheet5 = wb.createSheet("third sheet");
    HSSFSheet sheet6 = wb.createSheet("fifth sheet");
    FileOutputStream fileOut = new FileOutputStream
("c:\\spreadsheets\\myexcel.xls");
    wb.write(fileOut);
    fileOut.close();    
   out.println("Your file has been created succesfully");
        } catch ( Exception ex ) {
          
        } 
%>