如何向在控制器中抛出的异常发送messages.properties密钥？

<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basename" value="messages" />
    <property name="defaultEncoding" value="UTF-8" />
</bean>

@Controller
public class MyController {

    @Autowired
    private MessageSource messageSource;

    @RequestMapping("/someEndpoint")
    public void someEndpoint() {
        try {
            // 抛出异常
            throw new MyException("Some error message");
        } catch (MyException e) {
            String errorMessage = messageSource.getMessage("error.message.key", null, LocaleContextHolder.getLocale());
            // 发送错误消息
            // ...
        }
    }
}

error.message.key=An error occurred: {0}