Unable to read an uploaded multipart xml file

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I am trying to write a service that receives a xml file and parses it and does some additional processing. At the UI controller I converted the multipart file contents to a string and passed it to the service. From the UI controller - I upload the file and call the service method to parse the xml file

 MultipartFile newFile=multiPartRequest.getFile("newFileUpload");
 String fileContent = new String(newFile.getBytes());
 DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
 DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
 InputSource is = new InputSource(new StringReader(fileContent));
 doc = dBuilder.parse(is);

However, doc is always null. What is the best way for me to rest this xml file?

asked 56 secs ago

Mary
103

Unable to read an uploaded multipart xml file