Spring MVC: Designing Real-World Web Applications

Translating the error messages

It is really good for a developer to see the exceptions thrown by the application. However, for our users, they bear little value. We will therefore translate them. In order to do that, we have to inject our application's MessageSource class into our controller's constructor:

private final MessageSource messageSource;

@Autowired
public PictureUploadController(PictureUploadProperties uploadProperties, MessageSource messageSource) {
    picturesDir = uploadProperties.getUploadPath();
    anonymousPicture = uploadProperties.getAnonymousPicture();
    this.messageSource = messageSource;
}

Now, we can retrieve messages from our messages bundle:

@ExceptionHandler(IOException.class)
public ModelAndView handleIOException(Locale locale ...