}消费者可以为希望在响应中接收的字段设置路径，如果消费者只对产品标题和格式感兴趣，他们可以设置路径为“title”和“format”的FieldMask：FieldMask fieldMask = FieldMask.newBuilder()。
在生产者（服务器）端使用FieldMask在生产者（服务器）端，可以使用FieldMaskUtil.merge()[10]方法从响应负载中删除不必要的字段（第8、9行）：@Override。
References:[1] https://netflixtechblog.com/practical-api-design-at-netflix-part-1-using-protobuf-fieldmask-35cfdc606518"[2] https://grpc.io/"[3] https://jsonapi.org/format/#fetching-sparse-fieldsets"[4] https://netflixtechblog.com/netflix-studio-engineering-overview-ed60afcfa0ce"[5] https://developers.google.com/protocol-buffers/docs/reference/csharp/class/google/protobuf/well-known-types/field-mask"[6] https://developers.google.com/protocol-buffers"[7] https://en.wikipedia.org/wiki/Filmmaking"[8] https://en.wikipedia.org/wiki/Variable-length_quantity#Zigzag_encoding"[9] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/util/FieldMaskUtil.html#fromFieldNumbers-java.lang.Class-int...-"[10] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/util/FieldMaskUtil.html#merge-com.google.protobuf.FieldMask-com.google.protobuf.Message-com.google.protobuf.Message.Builder-"[11] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Descriptors"[12] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Descriptors.FieldDescriptor.html"[13] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/util/FieldMaskUtil.html#normalize-com.google.protobuf.FieldMask-"[14] https://google.aip.dev/161"你好，我是俞凡，在Motorola做过研发，现在在Mavenir做技术工作，对通信、网络、后端架构、云原生、DevOps、CICD、区块链、AI等技术始终保持着浓厚的兴趣，平时喜欢阅读、思考，相信持续学习、终身成长，欢迎一起交流学习 ... 阅读全文
在生产者（服务器）端使用FieldMask在生产者（服务器）端，可以使用FieldMaskUtil.merge()[10]方法从响应负载中删除不必要的字段（第8、9行）：@Override。
References:[1] https://netflixtechblog.com/practical-api-design-at-netflix-part-1-using-protobuf-fieldmask-35cfdc606518"[2] https://grpc.io/"[3] https://jsonapi.org/format/#fetching-sparse-fieldsets"[4] https://netflixtechblog.com/netflix-studio-engineering-overview-ed60afcfa0ce"[5] https://developers.google.com/protocol-buffers/docs/reference/csharp/class/google/protobuf/well-known-types/field-mask"[6] https://developers.google.com/protocol-buffers"[7] https://en.wikipedia.org/wiki/Filmmaking"[8] https://en.wikipedia.org/wiki/Variable-length_quantity#Zigzag_encoding"[9] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/util/FieldMaskUtil.html#fromFieldNumbers-java.lang.Class-int...-"[10] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/util/FieldMaskUtil.html#merge-com.google.protobuf.FieldMask-com.google.protobuf.Message-com.google.protobuf.Message.Builder-"[11] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Descriptors"[12] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Descriptors.FieldDescriptor.html"[13] https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/util/FieldMaskUtil.html#normalize-com.google.protobuf.FieldMask-"[14] https://google.aip.dev/161"你好，我是俞凡，在Motorola做过研发，现在在Mavenir做技术工作，对通信、网络、后端架构、云原生、DevOps、CICD、区块链、AI等技术始终保持着浓厚的兴趣，平时喜欢阅读、思考，相信持续学习、终身成长，欢迎一起交流学习 ... 阅读全文