如何在java中将数字从Excel输出为字符串？

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

import java.io.FileOutputStream;
import java.io.IOException;

public class ExcelWriter {
    public static void main(String[] args) {
        // 创建工作簿
        Workbook workbook = new XSSFWorkbook();
        
        // 创建工作表
        Sheet sheet = workbook.createSheet("Sheet1");
        
        // 创建行
        Row row = sheet.createRow(0);
        
        // 创建单元格，并设置数值
        Cell cell = row.createCell(0);
        cell.setCellValue(12345);
        
        // 将数字格式化为字符串
        CellStyle cellStyle = workbook.createCellStyle();
        DataFormat dataFormat = workbook.createDataFormat();
        cellStyle.setDataFormat(dataFormat.getFormat("@"));
        cell.setCellStyle(cellStyle);
        
        // 将工作簿写入文件
        try (FileOutputStream outputStream = new FileOutputStream("output.xlsx")) {
            workbook.write(outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        System.out.println("Excel文件已生成。");
    }
}