从java中编写Excel

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
        Cell cell = row.createCell(0);
        cell.setCellValue("Hello");
        
        // 保存Excel文件
        try (FileOutputStream outputStream = new FileOutputStream("output.xlsx")) {
            workbook.write(outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}