加边框 //创建workbookXSSFWorkbook workbook = new XSSFWorkbook();//创建sheetXSSFSheet sheet = workbook.createSheet("sheet1");//创建样式XSSFCellStyle cellStyle = workbook.createCellStyle();cellStyle.setBorderBot

报错信息1 AbstractMethodError: Method org/apache/poi/xssf/usermodel/XSSFWorkbook.close()V is abstract 解决：是因为poi 3.11才有close，升级pom文件的版本就可以了 报错信息2 Package should contain a content type part [M1.13] 报错