how to show the exception message occurred on a modal for an angular project

every time I upload an invalid file java throws an exception now I want to show the message on the frontend screen when it happens. Note : I am using an angular project.

controller code

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
public Response validateUpload(@FormDataParam("file") InputStream uploadedInputStream,
@FormDataParam("file") FormDataContentDisposition fileDetails,
@FormDataParam("uploadType") String uploadtype, @FormDataParam("aquiName") String aquiName) {

logger.debug("Received call to process Auto Account Import template id {}", uploadtype);

AccountImportType template = AccountImportType.valueOfSafe(uploadtype);
if (template == null)
return Response.status(Status.NOT_FOUND).entity("Template not found").build();

try {
ImportValidationResult results = importProcessor.doValidation(template, uploadedInputStream);

return Response.ok().entity(results).build();
} catch (TemplateNotReadableException e) {
logger.error("Failed to process upload", e);
return Response.status(Status.NOT_ACCEPTABLE).entity(e.getMessage()).build();
}
}


these errors in the controller are printing on chrome console I needed them to be on screen so that user is notified.

Continue reading...