@Post
public void acceptFormUpload(Representation entity) throws Exception {
 if (entity == null) {
 throw new ResourceException(400); // Bad request
 }
 if (MediaType.MULTIPART_FORM_DATA.equals(entity.getMediaType(), true)) {
 FileItemFactory factory = new DiskFileItemFactory();
 RestletFileUpload fileUpload = new RestletFileUpload(factory);
 List<FileItem> fileItems = fileUpload.parseRepresentation(entity);
 if (fileItems == null) {
 throw new ResourceException(400); // Bad request
 }
 for (FileItem fileItem : fileItems) {
 if (fileItem.isFormField()) {
 String fieldName = fileItem.getFieldName();
 String fieldValue = fileItem.getString();
 System.out.println("Field name: " + fieldName + ", Value: " + fieldValue);
 }
 else {
 String fieldName = fileItem.getFieldName();
 String fileName = fileItem.getName();
 long fileSize = fileItem.getSize();
 System.out.println("File size: " + fileSize + " bytes");
 }
 }
 } else {
 throw new ResourceException(415); // Unsupported media type
 }
}

POST http://localhost:8080
Content-Type: multipart/form-data; boundary=*****BoundaryMarker*****
--*****BoundaryMarker*****
Content-Disposition: form-data; name="file"; filename="2024-03-31T081059.200.json"
Content-Type: application/json

POST http://localhost:8080
Content-Type: multipart/form-data; boundary=WebAppBoundary
--WebAppBoundary
Content-Disposition: form-data; name="textfield"
textvalue
--WebAppBoundary
Content-Disposition: form-data; name="radiobutton"
selectedvalue
--WebAppBoundary
Content-Disposition: form-data; name="checkbox"
true
--WebAppBoundary--

POST http://localhost:8080
Content-Type: multipart/form-data; boundary=WebAppBoundary
--WebAppBoundary
Content-Disposition: form-data; name="textfield"
textvalue
--WebAppBoundary
Content-Disposition: form-data; name="radiobutton"
selectedvalue
--WebAppBoundary
Content-Disposition: form-data; name="checkbox"
true
--WebAppBoundary
Content-Disposition: form-data; name="file"; filename="2024-03-31T081059.200.json"
Content-Type: application/json
<@2024年03月31日T081059.200.json
--WebAppBoundary--