Save Html With StreamProvider

When converting excel fiels which contain images and shapes to html files, we offen face the following two issues:

1. Where should we save the images and shapes when saving excel file to html stream.
2. Replace the default path with excepted path.

This article explains how to implement IStreamProvider interface for setting the HtmlSaveOptions.StreamProvider property. By implementing this interface, you will be able to save the created resources during HTML generation to your specific locations or memory streams.

Sample Code

This is the main code showing the usage of HtmlSaveOptions.StreamProvider property

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java
String dataDir = Utils.getDataDir(HtmlSaveOptions.class);
Workbook wb = new Workbook(dataDir + "sample.xlsx");
HtmlSaveOptions options = new HtmlSaveOptions();
options.setStreamProvider(new ExportStreamProvider(dataDir));
wb.save(dataDir + "out.html", options);

Here is the code for ExportStreamProvider class which implements IStreamProvider interface used inside the above code.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java

public class ExportStreamProvider implements IStreamProvider {
	private String outputDir;

	public ExportStreamProvider(String dir) {
		outputDir = dir;
		System.out.println(outputDir);
	}

	@Override
	public void closeStream(StreamProviderOptions options) throws Exception {
		if (options != null && options.getStream() != null) {
			options.getStream().close();
		}
	}

	@Override
	public void initStream(StreamProviderOptions options) throws Exception {
		System.out.println(options.getDefaultPath());

		File file = new File(outputDir);
		if (!file.exists() && !file.isDirectory()) {
			file.mkdirs();
		}
		String defaultPath = options.getDefaultPath();
		String path = outputDir + defaultPath.substring(defaultPath.lastIndexOf("/") + 1);
		options.setCustomPath(path);
		options.setStream(new FileOutputStream(path));
	}
}