import io.dropwizard.jersey.errors.LoggingExceptionMapper; //导入依赖的package包/类
@Override
    public void run(ApiConfig configuration, Environment environment) throws Exception {
        LOGGER.info("api started up");
        injector = guiceBundle.getInjector();
        JerseyEnvironment jersey = environment.jersey();
        register(environment.lifecycle(), REFLECTIONS.getSubTypesOf(Managed.class)); // registers NbdServer


//        injector.getInstance(SessionFactory.class); //init DB
        installCorsFilter(environment);
        //init all Singletons semi-eagerly
        REFLECTIONS.getTypesAnnotatedWith(Singleton.class).forEach(injector::getInstance);
        final Set<Class<?>> resources = REFLECTIONS.getTypesAnnotatedWith(Path.class);
        register(jersey, resources);


        jersey.register(new LoggingExceptionMapper<Throwable>() {
            @Override
            protected String formatErrorMessage(long id, Throwable exception) {
                StringWriter sw = new StringWriter();
                PrintWriter pw = new PrintWriter(sw);
                exception.printStackTrace(pw);
                return sw.toString();
            }
        });
        jersey.register(new JsonProcessingExceptionMapper(true));
        jersey.register(new EarlyEofExceptionMapper());


        final TrivialAuthenticator instance = injector.getInstance(TrivialAuthenticator.class);
        environment.jersey().register(new AuthDynamicFeature(
                new BasicCredentialAuthFilter.Builder<Principal>()
                        .setAuthenticator(instance)
                        .setAuthorizer((principal, role) -> false)
                        .buildAuthFilter()));
        environment.jersey().register(RolesAllowedDynamicFeature.class);

    }
 

import io.dropwizard.jersey.errors.LoggingExceptionMapper; //导入依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public Response toResponse(UncheckedExecutionException e) {
    ExceptionMapper mapper = _providers.getExceptionMapper(e.getCause().getClass());
    if (mapper == null) {
        return null;
    } else if (mapper instanceof LoggingExceptionMapper) {
        return mapper.toResponse(e);
    } else {
        return mapper.toResponse(e.getCause());
    }
}
 

import io.dropwizard.jersey.errors.LoggingExceptionMapper; //导入依赖的package包/类
@Override
    protected void configure() {
        bind(new LoggingExceptionMapper<Throwable>() {
        }).to(ExceptionMapper.class);
        bind(new JerseyViolationExceptionMapper()).to(ExceptionMapper.class);
        bind(new JsonProcessingExceptionMapper(isShowDetails())).to(ExceptionMapper.class);
        bind(new EarlyEofExceptionMapper()).to(ExceptionMapper.class);
//        bind(new EmptyOptionalExceptionMapper()).to(ExceptionMapper.class);
    }
 

import io.dropwizard.jersey.errors.LoggingExceptionMapper; //导入依赖的package包/类
@Override
protected Handler createAppServlet(Server server,
                                   JerseyEnvironment jersey,
                                   ObjectMapper objectMapper,
                                   Validator validator,
                                   MutableServletContextHandler handler,
                                   @Nullable Servlet jerseyContainer,
                                   MetricRegistry metricRegistry) {
    if (jerseyContainer != null) {
        jersey.register(new LoggingExceptionMapper<Throwable>() {
            @Override
            public Response toResponse(Throwable exception) {
                final int status;
                final StatusEntity statusEntity;

                if (exception instanceof WebApplicationException) {
                    final Response response = ((WebApplicationException) exception).getResponse();
                    if (response.getStatusInfo().getFamily().equals(Response.Status.Family.SERVER_ERROR)) {
                        logException(exception);
                    }
                    status = response.getStatus();
                    statusEntity = new StatusEntity(status, new StatusMessage(µService.WEB_APPLICATION_ERROR, exception.getLocalizedMessage()));
                } else {
                    final long id = logException(exception);
                    status = Response.Status.INTERNAL_SERVER_ERROR.getStatusCode();
                    StatusMessage message = new StatusMessage(StatusMessage.Type.ERROR, String.format("%016x", id), µService.INTERNAL_SERVER_ERROR, formatErrorMessage(id, exception), null);
                    statusEntity = new StatusEntity(status, message);
                }

                return Response.status(status)
                        .type(MediaType.APPLICATION_JSON_TYPE)
                        .entity(statusEntity)
                        .build();
            }
        });
        jersey.register(new ConstraintViolationExceptionMapper());
        jersey.register(new JsonProcessingExceptionMapper());
        jersey.register(new EarlyEofExceptionMapper());
    }
    Handler appServlet = super.createAppServlet(server, jersey, objectMapper, validator, handler, jerseyContainer, metricRegistry);
    return appServlet;
}