两种方法向 Excel中插入图片

最新推荐文章于 2022-11-25 17:28:17 发布

Steve_wang_victor

最新推荐文章于 2022-11-25 17:28:17 发布

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分类专栏： java 文章标签： excel file null image string path

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本文详细介绍如何使用POI和jxl库向Excel文档中插入图片，包括不同格式的支持及具体实现步骤。

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目前对 Excel 的各种操作主要通过 POI 或 jxl 实现. 下面分别简要介绍如何向 Excel 中插入图片.

1、利用 POI 向Excel中插入图片可参考：http://gocom.primeton.com/blog10751_1221.htm

测试代码：

public static void main(String[] args) {
        FileOutputStream fileOut = null;
        BufferedImage bufferImg = null;
        BufferedImage bufferImg1 = null;
        try {

            // 先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray
            ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
            ByteArrayOutputStream byteArrayOut1 = new ByteArrayOutputStream();
            bufferImg = ImageIO.read(new File("C:/graph.jpg"));
            bufferImg1 = ImageIO.read(new File("c:/person.jpg"));
            ImageIO.write(bufferImg, "jpg", byteArrayOut);
            ImageIO.write(bufferImg1, "jpg", byteArrayOut1);

            // 创建一个工作薄
            HSSFWorkbook wb = new HSSFWorkbook();
            HSSFSheet sheet1 = wb.createSheet("new sheet");
            // HSSFRow row = sheet1.createRow(2);
            HSSFPatriarch patriarch = sheet1.createDrawingPatriarch();
            HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 512, 255,
                    (short) 1, 1, (short) 10, 20);
            HSSFClientAnchor anchor1 = new HSSFClientAnchor(0, 0, 512, 255,
                    (short) 2, 30, (short) 10, 60);
            anchor1.setAnchorType(2);
            // 插入图片
            patriarch.createPicture(anchor, wb.addPicture(byteArrayOut
                    .toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG));
            patriarch.createPicture(anchor1, wb.addPicture(byteArrayOut1
                    .toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG));

            fileOut = new FileOutputStream("C:/workbook.xls");
            // 写入excel文件
            wb.write(fileOut);
            fileOut.close();

        } catch (IOException io) {
            io.printStackTrace();
            System.out.println("io erorr : " + io.getMessage());
        } finally {
            if (fileOut != null) {

                try {
                    fileOut.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

2、利用 jxl(jexcelapi) 向Excel中插入图片

可参考：http://hi.baidu.com/82826200/blog/item/4c380f239c426c569922ed33.html

目前, 此方式只支持 PNG 格式图片.

测试代码：

String path = "c:/testJxl.xls";
        File file = new File(path);
        if (file.exists())
            file.delete();

        boolean flag = true;
        WritableWorkbook wwb = null;
        try {
            wwb = Workbook.createWorkbook(file);
            WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);
            File fileImage = new File("C://graph.png");

            BufferedImage bufImage = ImageIO.read(fileImage);
            double height = bufImage.getHeight();
            double width = bufImage.getWidth();

            WritableImage image = new WritableImage(1, 4, 6, 18, fileImage);

            ws.addImage(image);
            wwb.write();
            try {
                wwb.close();
            } catch (WriteException e) {
                flag = false;
            } catch (IOException e) {
                flag = false;
            }
        } catch (IOException e) {
            flag = false;
        }

        if (flag)
            System.out.println("Success!");
        else
            System.out.println("False!");
    }