Apache POI - 将 Word 文档 (docx) 拆分为页面 [英] Apache POI - Split Word document (docx) to pages

问题描述

我一直在尝试根据预定义的标准将 docx 文档分割为多个文档.以下是我将其切成段落的方法

I have been trying to segment a docx document to multiple documents based on a predefined criteria. following is my approach to cut it to paragraphs

        try {
        FileInputStream in = new FileInputStream(file);
        XWPFDocument doc = new XWPFDocument(in);
        List<XWPFParagraph> paragraphs = doc.getParagraphs();
        for (int idx = 0; idx < paragraphs.size(); idx++) {
            XWPFDocument outputDocument = new XWPFDocument();
            createParagraphInAnotherDocument(outputDocument, paragraphs.get(idx).getText());
            String fullPath = String.format("./content/output/%1$s_%2$s_%3$04d.docx", FileUtils.getFileName(file), getName(), idx);
            FileOutputStream outputStream = new FileOutputStream(fullPath);
            outputDocument.write(outputStream);
            outputDocument.close();

            doc.close();
        }

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

虽然我可以用上面的代码提取段落，但我找不到提取页面的方法.我的理解是 word 中的页面是渲染关注，它发生在 word 应用程序中的运行时.

While I am able to extract paragraphs with the code above, I can't find a way to extract pages. My understanding is that pages in word are render concern, and it happens in the runtime in the word application.

推荐答案

据我所知，唯一的方法是查询 Word 文档的 DOM 模型，然后确定有多少个段落每页.以下是该问题的可能解决方案(仅当页面被分页符明确分隔时才有效)

As far as I can see, the only way to do this is by interrogating the DOM model for the Word doc, and then determining how many paragraphs there are on each page. Below is a possible solution to the problem (it only works if the pages are explicitly separated by page breaks)

public static void main(String[] args) {
    XWPFDocument doc = null;

    try {
        //Input Word Document
        File file = new File("C:/TestDoc.docx");
        FileInputStream in = new FileInputStream(file);
        doc = new XWPFDocument(in);

        //Determine how many paragraphs per page
        List<Integer> paragraphCountList = getParagraphCountPerPage(doc);

        if (paragraphCountList != null && paragraphCountList.size() > 0) {
            int docCount = 0;
            int startIndex = 0;
            int endIndex = paragraphCountList.get(0);

            //Loop through the paragraph counts for each page
            for (int i=0; i < paragraphCountList.size(); i++) {
                XWPFDocument outputDocument = new XWPFDocument();

                List<XWPFParagraph> paragraphs = doc.getParagraphs();
                List<XWPFParagraph> pageParagraphs = new ArrayList<XWPFParagraph>();

                if (paragraphs != null && paragraphs.size() > 0) {
                    //Get the paragraphs from the input Word document
                    for (int j=startIndex; j < endIndex; j++) {
                        if (paragraphs.get(j) != null) {
                            pageParagraphs.add(paragraphs.get(j));
                        }
                    }

                    //Set the start and end point for the next set of paragraphs
                    startIndex = endIndex;

                    if (i < paragraphCountList.size()-2) {
                        endIndex = endIndex + paragraphCountList.get(i+1);
                    } else {
                        endIndex = paragraphs.size()-1;
                    }


                    //Create a new Word Doc with the paragraph subset
                    createPageInAnotherDocument(outputDocument, pageParagraphs);

                    //Write the file
                    String outputPath = "C:/TestDocOutput"+docCount+".docx";
                    FileOutputStream outputStream = new FileOutputStream(outputPath);
                    outputDocument.write(outputStream);
                    outputDocument.close();

                    docCount++;
                    pageParagraphs = new ArrayList<XWPFParagraph>();
                }
            }
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            doc.close();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
}


private static List<Integer> getParagraphCountPerPage(XWPFDocument doc) throws Exception {
    List<Integer> paragraphCountList = new ArrayList<>();
    int paragraphCount = 0;

    Document domDoc = convertStringToDOM(doc.getDocument().getBody().toString());
    NodeList rootChildNodeList = domDoc.getChildNodes().item(0).getChildNodes();

    for (int i=0; i < rootChildNodeList.getLength(); i++) {
        Node childNode = rootChildNodeList.item(i);

        if (childNode.getNodeName().equals("w:p")) {
            paragraphCount++;

            if (childNode.getChildNodes() != null) {
                for (int k=0; k < childNode.getChildNodes().getLength(); k++) {
                    if (childNode.getChildNodes().item(k).getNodeName().equals("w:r")) {
                        for (int m=0; m < childNode.getChildNodes().item(k).getChildNodes().getLength(); m++) {
                            if (childNode.getChildNodes().item(k).getChildNodes().item(m).getNodeName().equals("w:br")) {

                                paragraphCountList.add(paragraphCount);
                                paragraphCount = 0;
                            }
                        }
                    }
                }
            }
        }
    }

    paragraphCountList.add(paragraphCount+1);

    return paragraphCountList;
}


private static Document convertStringToDOM(String xmlData) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();

    Document document = builder.parse(new InputSource(new StringReader(xmlData)));    

    return document;
}


private static void createPageInAnotherDocument(XWPFDocument outputDocument, List<XWPFParagraph> pageParagraphs) throws IOException {
    for (int i = 0; i < pageParagraphs.size(); i++) {
        addParagraphToDocument(outputDocument, pageParagraphs.get(i).getText());
    }
}


private static void addParagraphToDocument(XWPFDocument outputDocument, String text) throws IOException {
    XWPFParagraph paragraph = outputDocument.createParagraph();
    XWPFRun run = paragraph.createRun();
    run.setText(text);
}

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