为什么要使用protobuf
protobuf提供了效率、灵活性和易用性之间的平衡，使其成为各种场景(包括微服务、分布式系统和网络通信)中数据序列化和交换的有吸引力的选择
配置环境
- 安装protobuf
- 配置环境变量
- 引入类库
- protoc_plugin
- protobuf
protobuf: ^3.1.0 protoc_plugin: ^21.1.2
编写proto描述文件-person.proto
syntax = "proto3"; import "google/protobuf/timestamp.proto"; message Person { string name = 1; int32 id = 2; // Unique ID number for this person. string email = 3; enum PhoneType { PHONE_TYPE_UNSPECIFIED = 0; PHONE_TYPE_MOBILE = 1; PHONE_TYPE_HOME = 2; PHONE_TYPE_WORK = 3; } message PhoneNumber { string number = 1; PhoneType type = 2; } repeated PhoneNumber phones = 4; google.protobuf.Timestamp last_updated = 5; } // Our address book file is just one of these. message AddressBook { repeated Person people = 1; }
编译生成dart文件
protoc --dart_out=. google/protobuf/timestamp.proto
protoc --dart_out=. ./*.proto
使用
test('test Proto', () async { final m1 = Person.create()..name = "李四"..id=5..email="123444"..phones.add(Person_PhoneNumber( number: "123456", type: Person_PhoneType.PHONE_TYPE_HOME, ))..lastUpdated = Timestamp(seconds: $fixnum.Int64.parseInt((DateTime.now().millisecondsSinceEpoch~/1000).toString())); final result = m1.writeToBuffer(); print(m1.toString()); print(m1.name); final p2 = Person.fromBuffer(result); p2.name = "张三"; final result2 = p2.writeToBuffer(); print(result2); print(p2.name); });
