如何用java spring格式化excel？

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.2</version>
</dependency>

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.stereotype.Service;

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

@Service
public class ExcelFormatter {

    public void formatExcel() throws IOException {
        // 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
        Cell cell = row.createCell(0);
        cell.setCellValue("Hello, World!");

        // 保存Excel文件
        FileOutputStream fileOut = new FileOutputStream("output.xlsx");
        workbook.write(fileOut);
        fileOut.close();

        // 关闭工作簿
        workbook.close();
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import java.io.IOException;

@SpringBootApplication
public class Application {

    @Autowired
    private ExcelFormatter excelFormatter;

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    public void formatExcel() {
        try {
            excelFormatter.formatExcel();
            System.out.println("Excel formatted successfully.");
        } catch (IOException e) {
            System.out.println("Error formatting Excel: " + e.getMessage());
        }
    }
}