Convert OneNote to HTML in Java

Save to Byte Array With Embedded Resources

Document document = new Document(dataDir + "Sample1.one");

HtmlSaveOptions options = new HtmlSaveOptions();
options.setExportCss(ResourceExportType.ExportEmbedded);
options.setExportImages(ResourceExportType.ExportEmbedded);
options.setExportFonts(ResourceExportType.ExportEmbedded);
options.setFontFaceTypes(FontFaceType.Ttf);

ByteArrayOutputStream r = new ByteArrayOutputStream();
document.save(r, options);

Save to Byte Array with Callbacks

Document document = new Document(dataDir + "Sample1.one");

UserSavingCallbacks savingCallbacks = new UserSavingCallbacks();
savingCallbacks.setRootFolder("documentFolder");
savingCallbacks.setCssFolder("css");
savingCallbacks.setKeepCssStreamOpened(true);
savingCallbacks.setImagesFolder("images");
savingCallbacks.setFontsFolder("fonts");

HtmlSaveOptions options = new HtmlSaveOptions();
options.setFontFaceTypes(FontFaceType.Ttf);
options.setCssSavingCallback(savingCallbacks);
options.setImageSavingCallback(savingCallbacks);
options.setFontSavingCallback(savingCallbacks);
options.setExportCss(ResourceExportType.ExportEmbedded);
options.setExportImages(ResourceExportType.ExportEmbedded);
options.setExportFonts(ResourceExportType.ExportEmbedded);

File dir = new File(savingCallbacks.getRootFolder());
if (!dir.exists()) {
	dir.mkdir();
}

document.save(Paths.get(savingCallbacks.getRootFolder(), "document.html").toString(), options);

try (OutputStreamWriter writer = new OutputStreamWriter(savingCallbacks.getCssStream(), "utf-8")) {
	writer.write(System.lineSeparator());
	writer.write("/* This line is appended to stream manually by user */");
	writer.close();
}

The above sample will require the following class for execution.

public final int getCssSaved() {
	return auto_CssSaved;
}

private void setCssSaved(int value) {
	auto_CssSaved = value;
}

private int auto_CssSaved;

public final int getFontsSaved() {
	return auto_FontsSaved;
}

private void setFontsSaved(int value) {
	auto_FontsSaved = value;
}

private int auto_FontsSaved;

public final int getImagessSaved() {
	return auto_ImagessSaved;
}

private void setImagessSaved(int value) {
	auto_ImagessSaved = value;
}

private int auto_ImagessSaved;

public final String getRootFolder() {
	return auto_RootFolder;
}

public final void setRootFolder(String value) {
	auto_RootFolder = value;
}

private String auto_RootFolder;

public final boolean getKeepCssStreamOpened() {
	return auto_KeepCssStreamOpened;
}

public final void setKeepCssStreamOpened(boolean value) {
	auto_KeepCssStreamOpened = value;
}

private boolean auto_KeepCssStreamOpened;

public final String getCssFolder() {
	return auto_CssFolder;
}

public final void setCssFolder(String value) {
	auto_CssFolder = value;
}

private String auto_CssFolder;

public final OutputStream getCssStream() {
	return auto_CssStream;
}

private void setCssStream(OutputStream value) {
	auto_CssStream = value;
}

private OutputStream auto_CssStream;

public final String getFontsFolder() {
	return auto_FontsFolder;
}

public final void setFontsFolder(String value) {
	auto_FontsFolder = value;
}

private String auto_FontsFolder;

public final String getImagesFolder() {
	return auto_ImagesFolder;
}

public final void setImagesFolder(String value) {
	auto_ImagesFolder = value;
}

private String auto_ImagesFolder;

public final void fontSaving(FontSavingArgs args) {
	String uri = null;
	OutputStream stream = null;
	String[] referenceToUri = { uri };
	OutputStream[] referenceToStream = { stream };
	this.createResourceInFolder(this.getFontsFolder(), args.getFileName(), /* out */ referenceToUri,
			/* out */ referenceToStream);
	uri = referenceToUri[0];
	stream = referenceToStream[0];
	args.setStream(stream);
	args.setUri(Paths.get("..", uri).toString().replace("\\", "\\\\"));

	this.setFontsSaved(this.getFontsSaved() + 1);
}

public final void cssSaving(CssSavingArgs args) {
	String uri = null;
	OutputStream stream = null;
	String[] referenceToUri = { uri };
	OutputStream[] referenceToStream = { stream };
	this.createResourceInFolder(this.getCssFolder(), args.getFileName(), /* out */ referenceToUri,
			/* out */ referenceToStream);
	uri = referenceToUri[0];
	stream = referenceToStream[0];
	this.setCssStream(stream);
	args.setStream(stream);
	args.setKeepStreamOpen(this.getKeepCssStreamOpened());
	args.setUri(uri);

	this.setCssSaved(this.getCssSaved() + 1);
}

public final void imageSaving(ImageSavingArgs args) {
	String uri = null;
	OutputStream stream = null;
	String[] referenceToUri = { uri };
	OutputStream[] referenceToStream = { stream };
	this.createResourceInFolder(this.getImagesFolder(), args.getFileName(), /* out */ referenceToUri,
			/* out */ referenceToStream);
	uri = referenceToUri[0];
	stream = referenceToStream[0];
	args.setStream(stream);
	args.setUri(uri);

	this.setImagessSaved(this.getImagessSaved() + 1);
}

private void createResourceInFolder(String folder, String filename, /* out */ String[] uri,
		/* out */ OutputStream[] stream) {
	String relativePath = folder;

	String fullPath = Paths.get(this.getRootFolder(), relativePath).toString();
	File dir = new File(fullPath);
	try {
		if (!dir.exists()) {
			dir.mkdir();
		}

		stream[0] = new FileOutputStream(Paths.get(fullPath, filename).toFile());
	} catch (IOException e) {
		throw new RuntimeException(e);
	}
	uri[0] = Paths.get(relativePath, filename).toString();
}

Save as HTML File with Resources In Separate File

Document document = new Document(dataDir + "Sample1.one");

HtmlSaveOptions options = new HtmlSaveOptions();
options.setExportCss(ResourceExportType.ExportEmbedded);
options.setExportFonts(ResourceExportType.ExportEmbedded);
options.setExportImages(ResourceExportType.ExportEmbedded);

document.save(dataDir + "document.html", options);