Apache POI Excel:在Libreoffice的PrintPreview中使用ActiveSheet生成多个工作表

import org.apache.poi.ss.usermodel.*;

public class ExcelGenerator {
    public static void main(String[] args) {
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet1 = workbook.createSheet("Sheet 1");
        workbook.setActiveSheet(0);

        // 生成第一个工作表的内容
        Row row1 = sheet1.createRow(0);
        Cell cell1 = row1.createCell(0);
        cell1.setCellValue("Hello from Sheet 1");

        Sheet sheet2 = workbook.createSheet("Sheet 2");
        workbook.setActiveSheet(1);

        // 生成第二个工作表的内容
        Row row2 = sheet2.createRow(0);
        Cell cell2 = row2.createCell(0);
        cell2.setCellValue("Hello from Sheet 2");

        // 保存Excel文件
        try {
            FileOutputStream outputStream = new FileOutputStream("output.xlsx");
            workbook.write(outputStream);
            outputStream.close();
            System.out.println("Excel文件生成成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}