how to add a new row of data in excel using java
package net.codejava.excel;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
/**
* This program illustrates how to update an existing Microsoft Excel document.
* Append new rows to an existing sheet.
*
* @author www.codejava.net
*
*/
public class ExcelFileUpdateExample1 {
public static void main(String[] args) {
String excelFilePath = "JavaBooks.xls";
try {
FileInputStream inputStream = new FileInputStream(new File(excelFilePath));
Workbook workbook = WorkbookFactory.create(inputStream);
Sheet sheet = workbook.getSheetAt(0);
Object[][] bookData = {
{"The Passionate Programmer", "Chad Fowler", 16},
{"Software Craftmanship", "Pete McBreen", 26},
{"The Art of Agile Development", "James Shore", 32},
{"Continuous Delivery", "Jez Humble", 41},
};
int rowCount = sheet.getLastRowNum();
for (Object[] aBook : bookData) {
Row row = sheet.createRow(++rowCount);
int columnCount = 0;
Cell cell = row.createCell(columnCount);
cell.setCellValue(rowCount);
for (Object field : aBook) {
cell = row.createCell(++columnCount);
if (field instanceof String) {
cell.setCellValue((String) field);
} else if (field instanceof Integer) {
cell.setCellValue((Integer) field);
}
}
}
inputStream.close();
FileOutputStream outputStream = new FileOutputStream("JavaBooks.xls");
workbook.write(outputStream);
workbook.close();
outputStream.close();
} catch (IOException | EncryptedDocumentException
| InvalidFormatException ex) {
ex.printStackTrace();
}
}
}