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- package excel;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.util.ArrayList;
- import java.util.List;
- import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
- import org.apache.poi.ss.usermodel.Cell;
- import org.apache.poi.ss.usermodel.CellStyle;
- import org.apache.poi.ss.usermodel.Font;
- import org.apache.poi.ss.usermodel.IndexedColors;
- 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.xssf.usermodel.XSSFWorkbook;
- public class ExcelWriter {
- private static String[] columns = { "First Name", "Last Name", "Email",
- "Date Of Birth" };
- private static List<Contact> contacts = new ArrayList<Contact>();
- public static void main(String[] args) throws IOException,
- InvalidFormatException {
- contacts.add(new Contact("Sylvain", "Saurel",
- "sylvain.saurel@gmail.com", "17/01/1980"));
- contacts.add(new Contact("Albert", "Dupond",
- "sylvain.saurel@gmail.com", "17/08/1989"));
- contacts.add(new Contact("Pierre", "Dupont",
- "sylvain.saurel@gmail.com", "17/07/1956"));
- contacts.add(new Contact("Mariano", "Diaz", "sylvain.saurel@gmail.com",
- "17/05/1988"));
- Workbook workbook = new XSSFWorkbook();
- Sheet sheet = workbook.createSheet("Contacts");
- Font headerFont = workbook.createFont();
- headerFont.setBold(true);
- headerFont.setFontHeightInPoints((short) 14);
- headerFont.setColor(IndexedColors.RED.getIndex());
- CellStyle headerCellStyle = workbook.createCellStyle();
- headerCellStyle.setFont(headerFont);
- // Create a Row
- Row headerRow = sheet.createRow(0);
- for (int i = 0; i < columns.length; i++) {
- Cell cell = headerRow.createCell(i);
- cell.setCellValue(columns[i]);
- cell.setCellStyle(headerCellStyle);
- }
- // Create Other rows and cells with contacts data
- int rowNum = 1;
- for (Contact contact : contacts) {
- Row row = sheet.createRow(rowNum++);
- row.createCell(0).setCellValue(contact.firstName);
- row.createCell(1).setCellValue(contact.lastName);
- row.createCell(2).setCellValue(contact.email);
- row.createCell(3).setCellValue(contact.dateOfBirth);
- }
- // Resize all columns to fit the content size
- for (int i = 0; i < columns.length; i++) {
- sheet.autoSizeColumn(i);
- }
- // Write the output to a file
- FileOutputStream fileOut = new FileOutputStream("contacts.xlsx");
- workbook.write(fileOut);
- fileOut.close();
- }
- }
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