excel样式格式问题

[hei]

问题描述

读一个excel后，需要对这个excel中的某些数据（数据不固定，没办法用fill来处理）进行处理，回写到这个excel里面，希望回写的excel文件样式格式不发生改变，我应该怎么做

[ljluestc]

import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelProcessor {
    public static void main(String[] args) {
        try {
            FileInputStream inputStream = new FileInputStream("input.xlsx");
            Workbook workbook = new XSSFWorkbook(inputStream);
            Sheet sheet = workbook.getSheetAt(0);

            // Modify data in the Excel sheet
            Row row = sheet.getRow(0);
            Cell cell = row.getCell(0);
            cell.setCellValue("New Value");

            // Preserve style formatting
            CellStyle style = cell.getCellStyle();

            // Write the modified Excel data back to the file
            FileOutputStream outputStream = new FileOutputStream("output.xlsx");
            workbook.write(outputStream);
            workbook.close();
            outputStream.close();

            System.out.println("Excel file has been modified and saved successfully.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}