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reading and writing excel file

                         

In this program, we are going to read and write the excel sheet  using java .

The package we need to import is :
java.io.*,
org.apache.poi.hssf.usermodel.HSSFSheet,
org.apache.poi.poifs.filesystem.POISFileSystem,
org.apache.poi.hssf.usermodel. HSSFWorkbook


org.apache.poi.poif.filesystem.POIFileSystem class is used to buffer the excel file into an object. In other words, we can say that it is used to read the excel file. After reading the excel file we use write() method to write into any excel file. 

We can read any file and write it into other excel file by this way. You can add new cell and rows  or you can set any default values for any cells. This means you can read excel file and modify it according to your need.

To run this example you have to download the excel file and code first then make folder with the name of excel in C drive then copy the excel file and copy the code into webapps then follow the steps as defined in previous examples. 

The code of the program is given below:

<%page import="org.apache.poi.hssf.usermodel.HSSFSheet"%>
<%page import="org.apache.poi.hssf.usermodel.HSSFWorkbook"%>
<%page import="org.apache.poi.poifs.filesystem.POIFSFileSystem"%>
<%page contentType="application/vnd.ms-excel" %>
<%page import="java.io.*" %>
<%
try{
   POIFSFileSystem fs=new POIFSFileSystem(new FileInputStream
(
"c:\\excel\\rajesh1.xls"));
    HSSFWorkbook wb=new HSSFWorkbook(fs);
    FileOutputStream fileOut = new FileOutputStream(
"c:\\excel\\readingWriting.xls");
    wb.write(fileOut);
    fileOut.close();
      out.println("Your excel file has been generated");
            
        catch Exception ex ) {       
        }
%>

The output of the program is given below:

Download this excel file.

Download this example.

                         

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