使用Spring Boot 2的WebClient时,空字段上的序列化失败

我试图在SpringBoot2中使用WebClient,如下所示:

client = WebClient.builder()
            .baseUrl(host)
            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
            .build();

 String reply = client.post().uri(URI.create(host + "/product/update")).body(BodyInserters.fromObject(product)).exchange().block().bodyToMono(String.class).block();

“产品”中的某些字段为空,例如“名称”字段。我得到这个错误:

org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field \"name\" (Class Product), not marked as ignorable\n at [Source: org.apache.catalina.connector.CoyoteInputStream@17a5cdd2; line: 1, column: 160] (through reference chain: Product[\"name\"])]\r\n"

如何告诉BodyInserter忽略空字段(如果有)?