POI 给单元格添加批注

    /**
     * 给Cell添加批注
     *
     * @param cell 单元格
     * @param value 批注内容
     * @param extension 扩展名
     */
    public static void addComment(Cell cell, String value, String extension) {
        Sheet sheet = cell.getSheet();
        cell.removeCellComment();
        if ("xls".equals(extension)) {
            ClientAnchor anchor = new HSSFClientAnchor();
            // 关键修改
            anchor.setDx1(0);
            anchor.setDx2(0);
            anchor.setDy1(0);
            anchor.setDy2(0);
            anchor.setCol1(cell.getColumnIndex());
            anchor.setRow1(cell.getRowIndex());
            anchor.setCol2(cell.getColumnIndex() + 5);
            anchor.setRow2(cell.getRowIndex() + 6);
            // 结束
            Drawing drawing = sheet.createDrawingPatriarch();
            Comment comment = drawing.createCellComment(anchor);
            // 输入批注信息
            comment.setString(new HSSFRichTextString(value));
            // 将批注添加到单元格对象中
            cell.setCellComment(comment);
        } else if ("xlsx".equals(extension)) {
            ClientAnchor anchor = new XSSFClientAnchor();
            // 关键修改
            anchor.setDx1(0);
            anchor.setDx2(0);
            anchor.setDy1(0);
            anchor.setDy2(0);
            anchor.setCol1(cell.getColumnIndex());
            anchor.setRow1(cell.getRowIndex());
            anchor.setCol2(cell.getColumnIndex() + 5);
            anchor.setRow2(cell.getRowIndex() + 6);
            // 结束
            Drawing drawing = sheet.createDrawingPatriarch();
            Comment comment = drawing.createCellComment(anchor);
            // 输入批注信息
            comment.setString(new XSSFRichTextString(value));
            // 将批注添加到单元格对象中
            cell.setCellComment(comment);
        }
    }

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原文链接：https://blog.csdn.net/qq_38974638/article/details/114837631