20.3. Input with multipart/form-data

When you write a JAX-RS service, RESTEasy provides an interface that lets you read the multipart/form-data MIME type. multipart/form-data is often found in web application HTML Form documents, and is generally used to upload files. The form-data format is like other multipart formats except that each inlined piece of content is associated with a name. The interface for form-data input is org.jboss.resteasy.plugins.providers.multipart.MultipartFormDataInput. 
public interface MultipartFormDataInput extends MultipartInput
{
   @Deprecated
   Map<String, InputPart> getFormData();

   Map<String, List<InputPart>> getFormDataMap();

   <T> T getFormDataPart(String key, Class<T> rawType, Type genericType) throws IOException;

   <T> T getFormDataPart(String key, GenericType<T> type) throws IOException;
}
This works similarly to MultipartInput, as described earlier in this chapter.