com.fasterxml.jackson.core.JsonProcessingException#getOriginalMessage ( )源码实例Demo

@ExceptionHandler(HttpMessageNotReadableException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
public MessageResponse handleHttpMessageNotReadableException(HttpServletRequest request, HttpMessageNotReadableException e) {
    if (e.getCause() instanceof UnrecognizedPropertyException) {
        return handleUnrecognizedPropertyException(request, (UnrecognizedPropertyException)e.getCause());
    } else {
        MessageResponse response;
        if (e.getCause() instanceof JsonProcessingException) {
            JsonProcessingException jpe = (JsonProcessingException)e.getCause();
            response = new MessageResponse(HttpStatus.BAD_REQUEST, buildDate(), request, jpe.getOriginalMessage());
        } else {
            response = new MessageResponse(HttpStatus.BAD_REQUEST, buildDate(), request, e.getMessage());
        }
        log(e, response);
        return response;
    }
}
 

private Response fromJsonProcessingException(JsonProcessingException e) {
    StringBuilder msgBuilder = new StringBuilder();
    if (e.getOriginalMessage() != null) {
        msgBuilder.append(e.getOriginalMessage());
    } else {
        msgBuilder.append("JSON processing error");
    }
    JsonLocation location = e.getLocation();
    if (location != null) {
        msgBuilder.append(" location: [line: ").append(location.getLineNr())
                .append(", column: ").append(location.getColumnNr()).append(']');
    }

    ErrorResponse errorResponse = ErrorResponse.newError(HttpServletResponse.SC_BAD_REQUEST, msgBuilder.toString())
            .clientRequest(httpServletRequest)
            .serverContext()
            .exceptionContext(e)
            .build();
    return Response.status(Status.BAD_REQUEST).entity(errorResponse).build();
}
 

@Override
protected void writeInternal(Object object, Type type, HttpOutputMessage outputMessage)
		throws IOException, HttpMessageNotWritableException {

	MediaType contentType = outputMessage.getHeaders().getContentType();
	JsonEncoding encoding = getJsonEncoding(contentType);
	JsonGenerator generator = this.objectMapper.getFactory().createGenerator(outputMessage.getBody(), encoding);
	try {
		writePrefix(generator, object);

		Class<?> serializationView = null;
		FilterProvider filters = null;
		Object value = object;
		JavaType javaType = null;
		if (object instanceof MappingJacksonValue) {
			MappingJacksonValue container = (MappingJacksonValue) object;
			value = container.getValue();
			serializationView = container.getSerializationView();
			filters = container.getFilters();
		}
		if (type != null && value != null && TypeUtils.isAssignable(type, value.getClass())) {
			javaType = getJavaType(type, null);
		}
		ObjectWriter objectWriter;
		if (serializationView != null) {
			objectWriter = this.objectMapper.writerWithView(serializationView);
		}
		else if (filters != null) {
			objectWriter = this.objectMapper.writer(filters);
		}
		else {
			objectWriter = this.objectMapper.writer();
		}
		if (javaType != null && javaType.isContainerType()) {
			objectWriter = objectWriter.forType(javaType);
		}
		SerializationConfig config = objectWriter.getConfig();
		if (contentType != null && contentType.isCompatibleWith(TEXT_EVENT_STREAM) &&
				config.isEnabled(SerializationFeature.INDENT_OUTPUT)) {
			objectWriter = objectWriter.with(this.ssePrettyPrinter);
		}
		objectWriter.writeValue(generator, value);

		writeSuffix(generator, object);
		generator.flush();

	}
	catch (JsonProcessingException ex) {
		throw new HttpMessageNotWritableException("Could not write JSON: " + ex.getOriginalMessage(), ex);
	}
}
 

/**
 * {@inheritDoc}
 */
@Override
public Response toResponse(JsonProcessingException exception) {
    Throwable throwable = exception;
    while (throwable != null) {
        if (throwable instanceof PersistenceException) {
            return exceptionMappers.get().findMapping(throwable).toResponse(throwable);
        }
        throwable = throwable.getCause();
    }

    logger.debug("Json Processing error", exception);
    String message = exception.getOriginalMessage();
    String desc = null;
    String source = null;
    if (mode.isDev()) {
        desc = IOUtils.getStackTrace(exception);
        JsonLocation location = exception.getLocation();
        if (location != null) {
            source = "line: " + location.getLineNr() +
                    ", column: " + location.getColumnNr();
        } else {
            source = exception.getStackTrace()[0].toString();
        }
    }

    ErrorMessage errorMessage = ErrorMessage.fromStatus(Response.Status.BAD_REQUEST.getStatusCode());
    errorMessage.setThrowable(exception);
    errorMessage.setCode(Hashing.murmur3_32().hashUnencodedChars(exception.getClass().getName()).toString());

    errorMessage.addError(new Result.Error(
            errorMessage.getCode(),
            message != null ? message : exception.getMessage(),
            desc,
            source
    ));

    return Response.status(errorMessage.getStatus())
            .entity(errorMessage)
            .type(ExceptionMapperUtils.getResponseType())
            .build();
}