Write Data in existing excel doc in new sheet

Program:

import java.io.File;

import java.io.IOException;

import java.util.Locale;

import jxl.CellView;

import jxl.Workbook;

import jxl.WorkbookSettings;

import jxl.format.UnderlineStyle;

import jxl.write.Formula;

import jxl.write.Label;

import jxl.write.Number;

import jxl.write.WritableCellFormat;

import jxl.write.WritableFont;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

import jxl.write.WriteException;

import jxl.write.biff.RowsExceededException;

public class WriteExcel {

  private WritableCellFormat timesBoldUnderline;

  private WritableCellFormat times;

  private String inputFile;

  

public void setOutputFile(String inputFile) {

  this.inputFile = inputFile;

  }

  public void write() throws IOException, WriteException {

    File file = new File(inputFile);

    WorkbookSettings wbSettings = new WorkbookSettings();

    wbSettings.setLocale(new Locale("en", "EN"));

    WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings);

    workbook.createSheet("Report", 0);

    WritableSheet excelSheet = workbook.getSheet(0);

    createLabel(excelSheet);

    createContent(excelSheet);

    workbook.write();

    workbook.close();

  }

  private void createLabel(WritableSheet sheet)

      throws WriteException {

    // Lets create a times font

    WritableFont times10pt = new WritableFont(WritableFont.TIMES, 10);

    // Define the cell format

    times = new WritableCellFormat(times10pt);

    // Lets automatically wrap the cells

    times.setWrap(true);

    // create create a bold font with unterlines

    WritableFont times10ptBoldUnderline = new WritableFont(WritableFont.TIMES, 10, WritableFont.BOLD, false,

        UnderlineStyle.SINGLE);

    timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline);

    // Lets automatically wrap the cells

    timesBoldUnderline.setWrap(true);

    CellView cv = new CellView();

    cv.setFormat(times);

    cv.setFormat(timesBoldUnderline);

    cv.setAutosize(true);

    // Write a few headers

    addCaption(sheet, 0, 0, "Header 1");

    addCaption(sheet, 1, 0, "This is another header");

    

  }

  private void createContent(WritableSheet sheet) throws WriteException,

      RowsExceededException {

    // Write a few number

    for (int i = 1; i < 10; i++) {

      // First column

      addNumber(sheet, 0, i, i + 10);

      // Second column

      addNumber(sheet, 1, i, i * i);

    }

    // Lets calculate the sum of it

    StringBuffer buf = new StringBuffer();

    buf.append("SUM(A2:A10)");

    Formula f = new Formula(0, 10, buf.toString());

    sheet.addCell(f);

    buf = new StringBuffer();

    buf.append("SUM(B2:B10)");

    f = new Formula(1, 10, buf.toString());

    sheet.addCell(f);

    // now a bit of text

    for (int i = 12; i < 20; i++) {

      // First column

      addLabel(sheet, 0, i, "Boring text " + i);

      // Second column

      addLabel(sheet, 1, i, "Another text");

    }

  }

  private void addCaption(WritableSheet sheet, int column, int row, String s)

      throws RowsExceededException, WriteException {

    Label label;

    label = new Label(column, row, s, timesBoldUnderline);

    sheet.addCell(label);

  }

  private void addNumber(WritableSheet sheet, int column, int row,

      Integer integer) throws WriteException, RowsExceededException {

    Number number;

    number = new Number(column, row, integer, times);

    sheet.addCell(number);

  }

  private void addLabel(WritableSheet sheet, int column, int row, String s)

      throws WriteException, RowsExceededException {

    Label label;

    label = new Label(column, row, s, times);

    sheet.addCell(label);

  }

  public static void main(String[] args) throws WriteException, IOException {

    WriteExcel test = new WriteExcel();

    test.setOutputFile("c:/temp/lars.xls");

    test.write();

    System.out

        .println("Please check the result file under c:/temp/lars.xls ");

  }

}