给poi升级后，应该是版本冲突了。程序里出现了很多标红的地方。

旧版：

        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        cellStyle.setBottomBorderColor(HSSFColor.BLACK.index);
        cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        cellStyle.setLeftBorderColor(HSSFColor.BLACK.index);
        cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);

新版:

        cellStyle.setAlignment(HorizontalAlignment.CENTER);
        cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        cellStyle.setBorderBottom(BorderStyle.THIN);
        cellStyle.setBottomBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        cellStyle.setBorderLeft(BorderStyle.THIN);
        cellStyle.setLeftBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        cellStyle.setBorderRight(BorderStyle.THIN);
        cellStyle.setRightBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
        cellStyle.setBorderTop(BorderStyle.THIN);
        cellStyle.setTopBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());

原文链接：https://www.codeleading.com/article/84123304192/