Docx4j开发手册-5|Docx4j的图片信息

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Docx4j开发手册-5|Docx4j的图片信息

一、通过Docx4j向文档添加照片

本章节代码来自docx4j项目github开源代码，有所改动。

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public class AddImage {
    public static void main(String[] args) throws Exception {
        WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new File("D:/XXXX/XXXX.docx"));
        // 要添加的图像
        File file = new File("D:/XXXX/1.png");

        InputStream is = new FileInputStream(file);
        long length = file.length();
        // 不能创建long型数组。
        // 必须是int类型。
        if (length > Integer.MAX_VALUE) {
            System.out.println("File too large!!");
        }
        byte[] bytes = new byte[(int) length];
        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length
                && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
            offset += numRead;
        }
        // 确保已读入所有字节
        if (offset < bytes.length) {
            System.out.println("无法完全读取文件" + file.getName());
        }
        is.close();

        String filenameHint = null;
        String altText = null;
        int id2 = 1;


        // 图像1：未指定宽度
        P p = newImage(wordMLPackage, bytes, filenameHint, altText, id2);
        wordMLPackage.getMainDocumentPart().addObject(p);

        // 图2：宽度3000
        P p2 = newImage(wordMLPackage, bytes, filenameHint, altText, id2, 3000);
        wordMLPackage.getMainDocumentPart().addObject(p2);

        // 图3：宽度6000
        P p3 = newImage(wordMLPackage, bytes, filenameHint, altText, id2, 6000);
        wordMLPackage.getMainDocumentPart().addObject(p3);

        // Now save it
        wordMLPackage.save(new File("D:/Desktop/image.docx"));

    }

    /**
     * 创建图像，不指定宽度
     */
    public static P newImage(WordprocessingMLPackage wordMLPackage, byte[] bytes, String filenameHint, String altText, int id2) throws Exception {

        BinaryPartAbstractImage imagePart = BinaryPartAbstractImage.createImagePart(wordMLPackage, bytes);

        Inline inline = imagePart.createImageInline(filenameHint, altText,
                wordMLPackage.getDrawingPropsIdTracker().generateId(), id2, false);

        // Now add the inline in w:p/w:r/w:drawing
        org.docx4j.wml.ObjectFactory factory = Context.getWmlObjectFactory();
        org.docx4j.wml.P p = factory.createP();
        org.docx4j.wml.R run = factory.createR();
        p.getContent().add(run);
        org.docx4j.wml.Drawing drawing = factory.createDrawing();
        run.getContent().add(drawing);
        drawing.getAnchorOrInline().add(inline);

        return p;

    }

    /**
     * 创建图像，以斜纹为单位指定宽度
     */
    public static P newImage(WordprocessingMLPackage wordMLPackage, byte[] bytes, String filenameHint, String altText, int id2, long cx) throws Exception {

        BinaryPartAbstractImage imagePart = BinaryPartAbstractImage.createImagePart(wordMLPackage, bytes);

        Inline inline = imagePart.createImageInline(filenameHint, altText,
                wordMLPackage.getDrawingPropsIdTracker().generateId(), id2, cx, false);

        // Now add the inline in w:p/w:r/w:drawing
        org.docx4j.wml.ObjectFactory factory = Context.getWmlObjectFactory();
        org.docx4j.wml.P p = factory.createP();
        org.docx4j.wml.R run = factory.createR();
        p.getContent().add(run);
        org.docx4j.wml.Drawing drawing = factory.createDrawing();
        run.getContent().add(drawing);
        drawing.getAnchorOrInline().add(inline);

        return p;

    }
}

二、通过Docx4j从文档获取照片保存到硬盘

以下代码仅未测试Demo，未对属性类型做严格检查，使用时请注意。

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public static void main(String[] args) throws Exception {
        // 加载 DOCX 文件
        WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new java.io.File("D:/XXXX/XXXX.docx"));

        MainDocumentPart mainDocumentPart = wordMLPackage.getMainDocumentPart();

        List<Object> content = mainDocumentPart.getContent();

        for (Object o : content) {
            P p = (P) o;
            List<Object> content1 = p.getContent();
            for (Object object : content1) {
                if (object instanceof R) {
                    R r = (R) object;
                    List<Object> rContent = r.getContent();
                    for (Object o1 : rContent) {
                        if (o1 instanceof JAXBElement) {
                            JAXBElement jaxbElement = (JAXBElement) o1;
                            Object value = jaxbElement.getValue();
                            if (value instanceof Drawing) {
                                Drawing drawing = (Drawing) value;
                                List<Object> anchorOrInline = drawing.getAnchorOrInline();
                                for (Object aoi : anchorOrInline) {
                                    if (aoi instanceof Inline) {
                                        Inline inline = (Inline) aoi;
                                        // Pic pic = inline.getGraphic().getGraphicData().getPic();
                                        Graphic graphic = inline.getGraphic();
                                        byte[] image = BinaryPartAbstractImage.getImage(wordMLPackage, graphic);
                                        saveFile("D:/" +UUID.fastUUID() + ".png", image);
                                    }
                                }
                            }
                        }
                    }
                }

            }
        }
    }

    /**
     * 将字节流转换成文件
     *
     * @param filename
     * @param data
     * @throws Exception
     */
    public static void saveFile(String filePath, byte[] data) throws Exception {
        if (data != null) {
            File file = new File(filePath);
            if (file.exists()) {
                file.delete();
            }
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(data, 0, data.length);
            fos.flush();
            fos.close();
        }
    }