SpringBoot系列---【响应结果统一处理】

代码

@Slf4j
@ControllerAdvice(basePackages = {"com.fast.controller"})
public class ControllerResponseAdvice implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {
        // response是Result类型，或者注释了NotResponseResult都不进行包装
        return !(methodParameter.getParameterType().isAssignableFrom(R.class)
                || methodParameter.hasMethodAnnotation(NotResponseResult.class));
    }

    @Override
    public Object beforeBodyWrite(Object data, MethodParameter returnType, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest request, ServerHttpResponse response) {
        // String类型不能直接包装
        ObjectMapper objectMapper = new ObjectMapper();
        if (returnType.getGenericParameterType().equals(String.class)) {
            try {
//                 将数据包装在Result里后转换为json串进行返回
                return objectMapper.writeValueAsString(R.ok(data));
            } catch (JsonProcessingException e) {
                throw new RuntimeException(e.getMessage());
            }
        }
        // 否则直接包装成Result返回
        return objectMapper;
    }
}