在XML方法上应用XSLT - 方法没有做任何事情

Question

我正在尝试制作一个带有2个参数的通用方法。 Xml作为String参数，Xsl文件的路径作为字符串参数。

该方法应返回一个字符串，其中xsl应用于xml，但它并没有真正做任何事情。

我猜这一行是错的： Source source = new StreamSource（new ByteArrayInputStream（xml.getBytes（）））;

因为当我尝试将其保存到磁盘而不是它工作正常 - 只是当我尝试将其全部存储在内存中时。

 private static String Convert(String xml, String xslFilename ) {
        try {
            // Create transformer factory
            TransformerFactory factory = TransformerFactory.newInstance();

            // Use the factory to create a template containing the xsl file
            Templates template = factory.newTemplates(new StreamSource(
                new FileInputStream(xslFilename)));

            // Use the template to create a transformer
            Transformer xformer = template.newTransformer();

            // Prepare the input and output files
            Source source = new StreamSource(new ByteArrayInputStream(xml.getBytes()));
            ByteArrayOutputStream output = new ByteArrayOutputStream();

            Result result = new StreamResult(output);
            // Apply the xsl file to the source file and write the result to the output file
            xformer.transform(source, result);

            String formattedResult = output.toString();
            return formattedResult;
        } catch (FileNotFoundException e) {
        } catch (TransformerConfigurationException e) {
            // An error occurred in the XSL file
        } catch (TransformerException e) {
            // An error occurred while applying the XSL file
            // Get location of error in input file
            SourceLocator locator = e.getLocator();
            int col = locator.getColumnNumber();
            int line = locator.getLineNumber();
            String publicId = locator.getPublicId();
            String systemId = locator.getSystemId();
        }
        return "";
    }
}