Excel导出
https://javapapers.com/spring/excel-export-in-spring-mvc/
https://blog.csdn.net/qq_36944793/article/details/78048017
https://www.bbsmax.com/A/D854VyyWzE/
https://stackoverflow.com/questions/18191893/generate-pdf-from-html-in-div-using-javascript
https://www.mkyong.com/spring-mvc/spring-mvc-export-data-to-pdf-file-via-abstractpdfview/