Apache POI 禁用圖片自動調整大小

Question

我正在使用 Apache POI 將圖像放入 Excel 表中。 當我使用 Excel 打開文件並手動調整包含圖像的單元格時，圖像也會調整大小。

如何將圖片插入不根據單元格大小調整大小的單元格？

我的代碼：

private void addImageToExcelReport(InputStream is, OutputStream os, File image) {
    try (BufferedReader br = new BufferedReader(new FileReader(image))) {
        if (br.readLine() != null) {
            XSSFWorkbook wb = new XSSFWorkbook(is);
            XSSFSheet sheet = wb.getSheetAt(0);

            InputStream inputStream = new FileInputStream(image);
            byte[] bytes = IOUtils.toByteArray(inputStream);

            int pictureIdx = wb.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
            inputStream.close();

            CreationHelper helper = wb.getCreationHelper();
            Drawing drawing = sheet.createDrawingPatriarch();
            ClientAnchor anchor = helper.createClientAnchor();
            sheet.createRow(1).createCell(0);

            anchor.setRow1(0);
            anchor.setRow2(1);
            anchor.setCol1(0);
            anchor.setCol2(1);

            drawing.createPicture(anchor, pictureIdx);

            wb.write(os);
            wb.close();
        }
    } catch (IOException e) {
        loggerService.traceError(e.getMessage(), e);
    }
}

Answer 1

正如 Alex Richter 所建議的，答案是設置錨類型。 以下代碼適用於我：

private void addImageToExcelReport(InputStream is, OutputStream os, File image) {
    if (image != null) {
        try {
            Workbook wb = new XSSFWorkbook(is);
            Sheet sheet = wb.getSheetAt(0);

            InputStream inputStream = new FileInputStream(image);
            byte[] bytes = IOUtils.toByteArray(inputStream);

            int pictureIdx = wb.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
            inputStream.close();

            CreationHelper helper = wb.getCreationHelper();
            Drawing<?> drawing = sheet.createDrawingPatriarch();
            ClientAnchor anchor = helper.createClientAnchor();
            anchor.setAnchorType(AnchorType.DONT_MOVE_AND_RESIZE);
            sheet.createRow(1).createCell(0);

            anchor.setRow1(0);
            anchor.setRow2(1);
            anchor.setCol1(0);
            anchor.setCol2(1);

            drawing.createPicture(anchor, pictureIdx);

            wb.write(os);
            wb.close();

        } catch (IOException e) {
            loggerService.traceError(e.getMessage(), e);
        }
    }
}

此外，請確保擁有正確的庫。 我的 pom.xml 包含這些庫：

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.0.1</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.0.1</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
    <version>4.0.1</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>ooxml-schemas</artifactId>
    <version>1.4</version>
</dependency>