SpringBoot 下载Excel文件，解决文件格式与文件拓展名指定的格式不一致问题

1.前端如果用xlsx格式接收表格 后台用XSSFWorkbook workbook = new XSSFWorkbook();创建工作薄

 response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
 response.addHeader("Content-Disposition", "attachment;filename=fileName" + ".xlsx");

2.前端如果用用xls格式接收表格 后台 用HSSFWorkbook workbook = new HSSFWorkbook();创建工作薄

response.setContentType("application/vnd.ms-excel");
response.addHeader("Content-Disposition", "attachment;filename=fileName"+".xls");