4

有一个包含一些图像的 DOC 文件。如何将其转换为带有图像的 HTML?

我尝试使用这个例子: Convert Word doc to HTML programmatically in Java

public class Converter {
    ...

    private File docFile, htmlFile;

    try {
        FileInputStream fos = new FileInputStream(docFile.getAbsolutePath()); 
        HWPFDocument doc = new HWPFDocument(fos);       
        Document newDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();

        WordToHtmlConverter wordToHtmlConverter = new WordToHtmlConverter(newDoc) ;
        wordToHtmlConverter.processDocument(doc);

        StringWriter stringWriter = new StringWriter();

        Transformer transformer = TransformerFactory.newInstance().newTransformer();        
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
        transformer.setOutputProperty(OutputKeys.METHOD, "html");
        transformer.transform(
                    new DOMSource(wordToHtmlConverter.getDocument()),
                    new StreamResult(stringWriter)
        );

        String html = stringWriter.toString();

        try {
            BufferedWriter out = new BufferedWriter(
                new OutputStreamWriter(new FileOutputStream(htmlFile), "UTF-8")
            );     
            out.write(html);
            out.close();
       } catch (IOException e) {
           e.printStackTrace();
       }

       JEditorPane jEditorPane = new JEditorPane();
       jEditorPane.setContentType("text/html");
       jEditorPane.setEditable(false);
       jEditorPane.setPage(htmlFile.toURI().toURL());

       JScrollPane jScrollPane = new JScrollPane(jEditorPane);

       JFrame jFrame = new JFrame("display html file");
       jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       jFrame.getContentPane().add(jScrollPane);
       jFrame.setSize(512, 342);
       jFrame.setVisible(true);

    } catch(Exception e) {
        e.printStackTrace();
    }
    ...
}

但是图像丢失了。

该类的文档说明如下WordToHtmlConverter

...此实现不会创建图像或指向它们的链接。这可以通过覆盖 AbstractWordConverter.processImage(Element, boolean, Picture) 方法来改变。

如何将 DOC 转换为带有图像的 HTML?

4

2 回答 2

5

扩展 WordToHtmlConverter 并覆盖 processImageWithoutPicturesManager

 import java.util.Base64;

import org.apache.poi.hwpf.converter.WordToHtmlConverter;
import org.apache.poi.hwpf.usermodel.Picture;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class InlineImageWordToHtmlConverter extends WordToHtmlConverter {

    public InlineImageWordToHtmlConverter(Document document) {
        super(document);
    }

    @Override
    protected void processImageWithoutPicturesManager(Element currentBlock,
        boolean inlined, Picture picture)
    {
        Element imgNode = currentBlock.getOwnerDocument().createElement("img");
        StringBuilder sb = new StringBuilder();
        sb.append(Base64.getMimeEncoder().encodeToString(picture.getRawContent()));
        sb.insert(0, "data:"+picture.getMimeType()+";base64,");
        imgNode.setAttribute("src", sb.toString());
        currentBlock.appendChild(imgNode);
    }

}

解析文档时使用新类,如下所示

HWPFDocumentCore wordDocument = WordToHtmlUtils.loadDoc(new FileInputStream("D:/temp/Temp.doc"));    
        WordToHtmlConverter wordToHtmlConverter = new InlineImageWordToHtmlConverter(
                DocumentBuilderFactory.newInstance().newDocumentBuilder()
                        .newDocument());
        wordToHtmlConverter.processDocument(wordDocument);
于 2015-03-24T09:23:44.563 回答
2

在这种情况下,您最好的选择是使用Apache Tika,并让它为您包装 Apache POI。Apache Tika 将为您的文档生成 HTML(或纯文本,但您需要针对您的案例的 HTML)。除此之外,它还会为嵌入式资源放置占位符,为嵌入式图像添加 img 标签,并为您提供一种获取嵌入式资源和图像内容的方法。

Alfresco HTMLRenderingEngine中有一个很好的例子。您可能希望查看那里的代码,然后编写自己的代码来做一些非常相似的事情。那里的代码包括一个自定义的 ContentHandler ,它允许编辑 img 标签,重写 src 属性,您可能需要也可能不需要,这取决于您要将图像写到哪里。

于 2012-12-11T08:28:57.487 回答