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// For complete examples and data files, please go to https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-Java
try {
	// Setup GroupDocs.Viewer config
	ViewerConfig config = Utilities.getConfiguration();

	// Create html handler
	ViewerHtmlHandler htmlHandler = new ViewerHtmlHandler(config);
	String guid = fileName;

	// Perform page reorder
	ReorderPageOptions options = new ReorderPageOptions(pageNumber, newPosition);
	htmlHandler.reorderPage(guid, options);

	// Set image options to include reorder transformations
	HtmlOptions htmlOptions = new HtmlOptions();
	htmlOptions.setTransformations(Transformation.Reorder);

	// Get html representation of all document pages, including rotate
	// transformations
	List<PageHtml> pages = htmlHandler.getPages(guid, htmlOptions);
	int pageNumberCount = 1;
	for (PageHtml page : pages) {
		Utilities.saveAsHtml(pageNumberCount + "_" + fileName, page.getHtmlContent());
		pageNumberCount++;
	}
} catch (Exception exp) {
	System.out.println("Exception: " + exp.getMessage());
	exp.printStackTrace();
}