SpringBoot+Vue实现简单的文件上传

1 环境 SpringBoot 3.2.1，Vue 2，ElementUI
2 页面

3 效果：只能上传xls文件且大小限制为2M，选择文件后自动上传。
4 前端代码

5 后端代码

package org.wjg.onlinexml.service.impl;  import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.springframework.stereotype.Service; import org.springframework.web.multipart.MultipartFile; import org.wjg.onlinexml.po.Result; import org.wjg.onlinexml.service.FileService;  import java.io.IOException;  @Service("xls") public class XLSServiceImpl implements FileService {      @Override     public Result upload(MultipartFile file) {         if (file.isEmpty()) {             return Result.builder().code(500).msg("上传失败！").build();         }           try (Workbook workbook = new HSSFWorkbook(file.getInputStream())) {             //获取第一个sheet页             Sheet sheet = workbook.getSheetAt(0);             //遍历每行             for (Row row : sheet) {                 //遍历每个单元格                 for (Cell cell : row) {                     System.out.print(cell.getStringCellValue() + " ");                 }                 System.out.println();             }         } catch (IOException e) {             e.printStackTrace();         }          return Result.builder().code(200).msg("上传成功").build();     } }