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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();

	// File guid
	String guid = fileName;
	
	// Create html handler
	ViewerHtmlHandler htmlHandler = new ViewerHtmlHandler(config); 
	 
	// Set html options to show grid lines
	HtmlOptions options = new HtmlOptions();
	options.getCellsOptions().setShowGridLines(true);
	List<PageHtml> pages = htmlHandler.getPages(guid, options);
	 
	for (PageHtml page : pages) {
	    System.out.println("Page number: " + page.getPageNumber());
	    System.out.println("Html content: " + page.getHtmlContent());
	    Utilities.saveAsHtml(page.getPageNumber() + "_" + fileName, page.getHtmlContent());
	}
} catch (Exception exp) {
	System.out.println("Exception: " + exp.getMessage());
	exp.printStackTrace();
}