我需要将 Apache POI 图片从 word 文档转换为 html 文件 [英] I need Apache POI Pictures converted from a word document to a html file

问题描述

我有一些代码使用 Java Apache POI 库打开 Microsoft Word 文档并将其转换为 html，使用 Apache POI，它还获取文档上图像的字节数组数据.但我需要将此信息转换为 html 以写出到 html 文件.任何提示或建议将不胜感激.请记住，我是一名桌面开发人员而不是 Web 程序员，所以当您提出建议时，请记住这一点.下面的代码获取图像.

I have some code that uses the Java Apache POI library to open a Microsoft word document and convert it to html, using the the Apache POI and it also gets the byte array data of images on the document. But I need to convert this information to html to write out to an html file. Any hints or suggestions would be appreciated. Keep in mind that I am a desktop dev developer and not a web programmer, so when you make suggestions, please remember that. The code below gets the image.

 private void parseWordText(File file) throws IOException {
      FileInputStream fs = new FileInputStream(file);
      doc = new HWPFDocument(fs);
      PicturesTable picTable = doc.getPicturesTable();
      if (picTable != null){
           picList = new ArrayList<Picture>(picTable.getAllPictures());
           if (!picList.isEmpty()) {
           for (Picture pic : picList) {
                byte[] byteArray = pic.getContent();
                pic.suggestFileExtension();
                pic.suggestFullFileName();
                pic.suggestPictureType();
                pic.getStartOffset();
           }
        }
     }

然后下面的代码将文档转换为 html.有没有办法在下面的代码中将 byteArray 添加到 ByteArrayOutputStream 中?

Then the code below this converts the document to html. Is there a way to add the byteArray to the ByteArrayOutputStream in the code below?

private void convertWordDoctoHTML(File file) throws ParserConfigurationException, TransformerConfigurationException, TransformerException, IOException {
    HWPFDocumentCore wordDocument = null;
    try {
        wordDocument = WordToHtmlUtils.loadDoc(new FileInputStream(file));
    } catch (IOException ex) {
        Exceptions.printStackTrace(ex);
    }

    WordToHtmlConverter wordToHtmlConverter = new WordToHtmlConverter(DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument());
    wordToHtmlConverter.processDocument(wordDocument);
    org.w3c.dom.Document htmlDocument = wordToHtmlConverter.getDocument();
    NamedNodeMap node = htmlDocument.getAttributes();


    ByteArrayOutputStream out = new ByteArrayOutputStream();
    DOMSource domSource = new DOMSource(htmlDocument);
    StreamResult streamResult = new StreamResult(out);

    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer serializer = tf.newTransformer();
    serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
    serializer.setOutputProperty(OutputKeys.INDENT, "yes");
    serializer.setOutputProperty(OutputKeys.METHOD, "html");
    serializer.transform(domSource, streamResult);
    out.close();

    String result = new String(out.toByteArray());
    acDocTextArea.setText(newDocText);

    htmlText = result;

}

推荐答案

查看 org.apache.poi.hwpf.converter.WordToHtmlConverter 的源代码

http://svn.apache.org/viewvc/poi/trunk/src/scratchpad/src/org/apache/poi/hwpf/converter/WordToHtmlConverter.java?view=markup&pathrev=1180740

它在 JavaDoc 中声明:

Looking at the source code for the org.apache.poi.hwpf.converter.WordToHtmlConverter at

http://svn.apache.org/viewvc/poi/trunk/src/scratchpad/src/org/apache/poi/hwpf/converter/WordToHtmlConverter.java?view=markup&pathrev=1180740

It states in the JavaDoc:

此实现不会创建图像或指向它们的链接.这可以是通过覆盖 {@link #processImage(Element, boolean, Picture)} 方法进行更改

如果您查看 AbstractWordConverter.java 中第 790 行的 processImage(...) 方法，看起来该方法正在调用另一个名为 processImageWithoutPicturesManager(...).

http://svn.apache.org/viewvc/poi/trunk/src/scratchpad/src/org/apache/poi/hwpf/converter/AbstractWordConverter.java?view=markup&pathrev=1180740

这个方法再次在 WordToHtmlConverter 中定义，看起来很像你想要增加代码的地方(第 317 行):

If you take a look at that processImage(...) method in AbstractWordConverter.java at line 790, it looks like the method is calling then another method named processImageWithoutPicturesManager(...).

http://svn.apache.org/viewvc/poi/trunk/src/scratchpad/src/org/apache/poi/hwpf/converter/AbstractWordConverter.java?view=markup&pathrev=1180740

This method is defined in WordToHtmlConverter again and looks suspiciously exact like the place you want to grow your code (line 317):

@Override
protected void processImageWithoutPicturesManager(Element currentBlock,
    boolean inlined, Picture picture)
{
    // no default implementation -- skip
    currentBlock.appendChild(htmlDocumentFacade.document
    .createComment("Image link to '"
    + picture.suggestFullFileName() + "' can be here"));
}

我认为您应该开始将图像插入到流程中.

I think you have the point where to start inserting the images into the flow.

创建转换器的子类，例如

Create a subclass of the converter, e.g.

    public class InlineImageWordToHtmlConverter extends WordToHtmlConverter

然后覆盖该方法并将任何代码放入其中.

我还没有测试过，但从理论上我看到的应该是正确的方法.

and then override the method and place whatever code into it.

I haven't tested it, but it should be the right way from what I see theoretically.

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