springboot返回值拦截并格式化

@ControllerAdvice
public class ResponseDataHandler implements ResponseBodyAdvice {
    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (returnType.hasMethodAnnotation(ExceptionHandler.class)) {
            //处理异常，可以再添加一个异常处理的类，用于处理异常返回格式
            return body;
        } else {
            return new ResponseBodyDTO(body);
        }
    }
}

 让springboot装配这个拦截器
@Configuration
public class WebConfig implements WebMvcConfigurer{

    @Bean
    public HttpMessageConverters useConverters() {

        return new HttpMessageConverters(new FastJsonHttpMessageConverter());
    }
}