how to split a docx file with images to docx files by title using docx4j

To split a DOCX file with images into multiple DOCX files by title using docx4j, you can follow these steps:

1. Load the original DOCX file using the docx4j library:

WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new File("path/to/original.docx"));

2. Iterate through the paragraphs in the document and find the paragraphs that contain the titles (e.g., using specific styles or formatting). You can use the `getMainDocumentPart().getContent()` method to access the paragraphs:

List<Object> paragraphs = wordMLPackage.getMainDocumentPart().getContent();
for (Object obj : paragraphs) {
    if (obj instanceof P) {
        P paragraph = (P) obj;
        // Check if the paragraph is a title (based on styles or formatting)
        // Split the document based on your conditions
    }
}

3. Once you identify the paragraphs containing the titles, create a new WordprocessingMLPackage for each section and copy the content into these new packages:

WordprocessingMLPackage newPackage = WordprocessingMLPackage.createPackage();
newPackage.getMainDocumentPart().getContent().add(paragraph);

4. If the title paragraphs are followed by images, you can iterate through the paragraph's content and check for any images using `instanceof` checks. Extract and copy the images to the new package's media folder:

for (Object obj : paragraph.getContent()) {
    if (obj instanceof Drawing) {
        Drawing drawing = (Drawing) obj;
        List<Object> imageList = drawing.getAnchorOrInline();
        for (Object image : imageList) {
            if (image instanceof Inline) {
                Inline inline = (Inline) image;
                // Copy the image to the new package's media folder
            }
        }
    }
}

5. Save each new package as a separate DOCX file using the desired title:

newPackage.save(new File("path/to/" + title + ".docx"));

Remember to handle any exceptions that may occur during this process. This is a general outline, and you may need to adapt the code based on your specific requirements and conditions for splitting the document.