POI操作EXCEL插入图片

POI操作EXCEL插入图片

依赖

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.2</version>
</dependency>

使用HSSFPatriarch来将图片写入EXCEL中

BufferedImage bufferImg;//图片
ByteArrayOutputStream byteArrayOut = null;
try {
    // 先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray
    byteArrayOut = new ByteArrayOutputStream();
    //将图片读到BufferedImage
    InputStream resource = Thread.currentThread().getContextClassLoader().getResourceAsStream(imageName);
    if(resource == null){
        throw new BusinessException("%s资源不存在",imageName);
    }
    bufferImg = ImageIO.read(resource);
    // 将图片写入流中
    ImageIO.write(bufferImg, "png", byteArrayOut);

    // 利用HSSFPatriarch将图片写入EXCEL
    HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定义单元格位置
    HSSFCreationHelper creationHelper = workbook.getCreationHelper();
    HSSFClientAnchor clientAnchor = creationHelper.createClientAnchor();
    clientAnchor.setCol1(columnNo);
    clientAnchor.setRow1(rowNo);


    // 插入图片  PICTURE_TYPE_PNG是图片的类型
    HSSFPicture picture = patriarch.createPicture(clientAnchor, workbook.addPicture(byteArrayOut
            .toByteArray(), HSSFWorkbook.PICTURE_TYPE_PNG));
    picture.resize(2.5);

} catch (IOException e) {
    LOGGER.error("图片写入excel失败", e);
} finally {
    if (byteArrayOut != null) {
        try {
            byteArrayOut.close();
        } catch (IOException e) {
            LOGGER.error("关闭流失败", e);
        }
    }

}

注：在将图片添加到工作簿中时，必须将其存储为字节数组