Check if Spring Multipart File uploaded has a form field - spring

Question

We were using the apache file uploads for uploading a file and below code was used for the same.
ServletFileUpload upload = new ServletFileUpload(itemFactory);
List<FileItem> items = upload.parseRequest(request);
Iterator<FileItem> iterator = items.iterator();
while (iterator.hasNext()) {
FileItem item = iterator.next();
if (item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
conf.put(name, value);
} else {
InputStream is = item.getInputStream();
byte[] bytes = ByteStreams.toByteArray(is);
String query = new String(bytes, "UTF-8");
conf.put("test", query);
}
}
But we recently moved to Spring boot and trying to use spring multipart to upload a file.The code which will replace the above code will be
DefaultMultipartHttpServletRequest requestMain = (DefaultMultipartHttpServletRequest) request;
Iterator<String> fileNameIterator = requestMain.getFileNames();
ListIterator<MultipartFile> iterator = null;
while (fileNameIterator.hasNext()) {
multipartFiles = requestMain.getFiles(fileNameIterator.next());
iterator = multipartFiles.listIterator();
while (iterator.hasNext()) {
MultipartFile item = iterator.next();
if (item.isEmpty()) {
// String name = item.getFieldName();
// String value = item.getString();
// conf.put(name, value);
} else {
InputStream is = item.getInputStream();
byte[] bytes = ByteStreams.toByteArray(is);
String query = new String(bytes, "UTF-8");
conf.put("query", query);
}
}
}
But I am not able to figure out how to check if the file has a form field in spring boot.In apache file upload it was achieved using item.isFormField() method.

Answer 1

You don't need to check if the item is form field.
The requestMain.getFiles(fileNameIterator.next()); method will return a MultipartFile so you know is not a form field.
To get the form fields use
requestMain.getParameterMap()
Or, for a specific field use
requestMain.getParameter("field")