数据库导出excel，前后端分离

主要参考了这篇博文：https://www.cnblogs.com/jerehedu/p/4343509.html  2.3和2.4

采用xssf，依赖：compile group: 'org.apache.poi', name: 'poi-ooxml', version: '3.17'

public void export(HttpServletResponse response) throws Exception {
    XSSFWorkbook workbook = ...
    response.setHeader("Content-Type", "application/octet-stream");
    response.setHeader("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    response.setHeader("Content-Disposition", "attachment;");
    workbook.write(response.getOutputStream());
    response.flushBuffer();
}

要注意的是前端接受到的是一个response，需要从里面取出数据。

后续：远程图片也需要导出到excel，参考：
https://www.cnblogs.com/hwaggLee/p/5631287.html
https://blog.****.net/qq_24076135/article/details/78045034