1. 设置content-type和header
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.addHeader("Content-Disposition", "attachment;filename=fileName" + ".xlsx");
2.使用XSSFWorkbook创建Workbook
Workbook workbook = new XSSFWorkbook();
原文链接:https://blog.csdn.net/a602049511/article/details/52367563