export data to excel sheet

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export data to excel sheet

Hi..
how to export data to excel sheet from jsp?
and how to update the excel sheet from jsp?
and how to get the data from excel sheet?
and how to make calculations in excel sheet like total avg from jsp?

Pls.....

View Answers

May 28, 2010 at 1:26 PM

Hi Friend,

Try the following code:

1)excel.jsp:

<%@page import=" java.io.*"%>
<%@page import=" java.sql.*"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFSheet"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFWorkbook"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFRow"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFCell"%>

<%
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root";, "root");
PreparedStatement psmnt = null;
Statement st=connection.createStatement();
ResultSet rs=st.executeQuery("Select * from student");

HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("Excel Sheet");
HSSFRow rowhead = sheet.createRow((short)0);
rowhead.createCell((short) 0).setCellValue("Roll No");
rowhead.createCell((short) 1).setCellValue("Name");
rowhead.createCell((short) 2).setCellValue("Marks");
rowhead.createCell((short) 3).setCellValue("Grade");

int index=1;
while(rs.next()){

HSSFRow row = sheet.createRow((short)index);
row.createCell((short)0).setCellValue(rs.getInt(1));
row.createCell((short)1).setCellValue(rs.getString(2));
row.createCell((short)2).setCellValue(rs.getInt(3));
row.createCell((short)3).setCellValue(rs.getString(4));
index++;
}
FileOutputStream fileOut = new FileOutputStream("c:\\excelFile.xls");
wb.write(fileOut);
fileOut.close();
out.println("Data is saved in excel file.");
rs.close();
connection.close();
}
catch(Exception e){}
%>

2)readExcel.jsp:

<%@page import="java.io.*"%>
<%@page import="java.util.*"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFSheet"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFWorkbook"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFRow"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFCell"%>
<form action="updateExcel.jsp">
<%
short a=0;
short b=1;
short c=2;
short d=3;
String filename ="C:/excelFile.xls";
if (filename != null && !filename.equals("")) {
try{
FileInputStream fs =new FileInputStream(filename);
HSSFWorkbook wb = new HSSFWorkbook(fs);
for (int k = 0; k < wb.getNumberOfSheets(); k++){
HSSFSheet sheet = wb.getSheetAt(k);
int rows = sheet.getPhysicalNumberOfRows();
for (int r = 1; r < rows; r++){
HSSFRow row = sheet.getRow(r);
if (row != null) {
int cells = row.getPhysicalNumberOfCells();
%><br><%
HSSFCell cell1 = row.getCell(a);
if (cell1 != null){
String value = null;
switch (cell1.getCellType()){
case HSSFCell.CELL_TYPE_FORMULA :
value = "FORMULA ";
break;
case HSSFCell.CELL_TYPE_NUMERIC :
value = ""+cell1.getNumericCellValue();
break;
case HSSFCell.CELL_TYPE_STRING :
value = cell1.getStringCellValue();
break;
default :
}
%>
<input type="text" name="roll" value="<%=value%>">
<%
}

May 28, 2010 at 1:28 PM

continue..

HSSFCell cell2 = row.getCell(b);
if (cell2 != null){
String value = null;
switch (cell2.getCellType()){
case HSSFCell.CELL_TYPE_FORMULA :
value = "FORMULA ";
break;
case HSSFCell.CELL_TYPE_NUMERIC :
value = ""+cell2.getNumericCellValue();
break;
case HSSFCell.CELL_TYPE_STRING :
value = cell2.getStringCellValue();
break;
default :
}
%>
<input type="text" name="name" value="<%=value%>">
<%
}
HSSFCell cell3 = row.getCell(c);
if (cell3 != null){
String value = null;
switch (cell3.getCellType()){
case HSSFCell.CELL_TYPE_FORMULA :
value = "FORMULA ";
break;
case HSSFCell.CELL_TYPE_NUMERIC :
value = ""+cell3.getNumericCellValue();
break;
case HSSFCell.CELL_TYPE_STRING :
value = cell3.getStringCellValue();
break;
default :
}
%>
<input type="text" name="marks" value="<%=value%>">
<%
}
HSSFCell cell4 = row.getCell(d);
if (cell4 != null){
String value = null;
switch (cell4.getCellType()){
case HSSFCell.CELL_TYPE_FORMULA :
value = "FORMULA ";
break;
case HSSFCell.CELL_TYPE_NUMERIC :
value = ""+cell4.getNumericCellValue();
break;
case HSSFCell.CELL_TYPE_STRING :
value = cell4.getStringCellValue();
break;
default :
}
%> <input type="text" name="grade" value="<%=value%>">
<%
}
}
}
}
}
catch (Exception ex){
ex.printStackTrace();
}
}
%>
<input type="submit" value="Edit">
</form>

3)updateExcel.jsp:

<%@page import="java.io.*"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFSheet"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFWorkbook"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFRow"%>
<%@page import=" org.apache.poi.hssf.usermodel.HSSFCell"%>

<%String id[]=request.getParameterValues("roll");
String name[]=request.getParameterValues("name");
String marks[]=request.getParameterValues("marks");
String grade[]=request.getParameterValues("grade");
int index=0;
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("Excel Sheet");
for(int i=0;i<id.length;i++){
HSSFRow row = sheet.createRow((short)index);
row.createCell((short)0).setCellValue(id[i]);
row.createCell((short)1).setCellValue(name[i]);
row.createCell((short)2).setCellValue(marks[i]);
row.createCell((short)3).setCellValue(grade[i]);
index++;
}
FileOutputStream fileOut = new FileOutputStream("c:\\excelFile.xls");
wb.write(fileOut);
fileOut.close();
%>

Thanks

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