下载protoc，打开链接 下载后将对应的文件解压到gopath的bin目录。 下载protoc的golang插件。下载地址 链接 下载后放在protoc的同级目录（需要改扩展名为exe） 测试，定义一个Proto syntax = "proto3"; option go_package = ".;hello"; package main; message String { string value = 1; } 然后执行命令 protoc hello.proto --go_out=. ,大功告成，生成的文件内容如下：
// Code generated by protoc-gen-go. DO NOT EDIT. // versions: // protoc-gen-go v1.24.0-devel // protoc v3.12.3 // source: hello.proto package hello import ( proto "github.com/golang/protobuf/proto" protoreflect "google.golang.org/protobuf/reflect/protoreflect" protoimpl "google.golang.org/protobuf/runtime/protoimpl" reflect "reflect" sync "sync" ) const ( // Verify that this generated code is sufficiently up-to-date. _ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion) // Verify that runtime/protoimpl is sufficiently up-to-date. _ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20) ) // This is a compile-time assertion that a sufficiently up-to-date version // of the legacy proto package is being used. const _ = proto.ProtoPackageIsVersion4 type String struct { state protoimpl.MessageState sizeCache protoimpl.SizeCache unknownFields protoimpl.UnknownFields Value string `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"` } func (x *String) Reset() { *x = String{} if protoimpl.UnsafeEnabled { mi := &file_hello_proto_msgTypes[0] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } } func (x *String) String() string { return protoimpl.X.MessageStringOf(x) } func (*String) ProtoMessage() {} func (x *String) ProtoReflect() protoreflect.Message { mi := &file_hello_proto_msgTypes[0] if protoimpl.UnsafeEnabled && x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { ms.StoreMessageInfo(mi) } return ms } return mi.MessageOf(x) } // Deprecated: Use String.ProtoReflect.Descriptor instead. func (*String) Descriptor() ([]byte, []int) { return file_hello_proto_rawDescGZIP(), []int{0} } func (x *String) GetValue() string { if x != nil { return x.Value } return "" } var File_hello_proto protoreflect.FileDescriptor var file_hello_proto_rawDesc = []byte{ 0x0a, 0x0b, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x04, 0x6d, 0x61, 0x69, 0x6e, 0x22, 0x1e, 0x0a, 0x06, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x42, 0x09, 0x5a, 0x07, 0x2e, 0x3b, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33, } var ( file_hello_proto_rawDescOnce sync.Once file_hello_proto_rawDescData = file_hello_proto_rawDesc ) func file_hello_proto_rawDescGZIP() []byte { file_hello_proto_rawDescOnce.Do(func() { file_hello_proto_rawDescData = protoimpl.X.CompressGZIP(file_hello_proto_rawDescData) }) return file_hello_proto_rawDescData } var file_hello_proto_msgTypes = make([]protoimpl.MessageInfo, 1) var file_hello_proto_goTypes = []interface{}{ (*String)(nil), // 0: main.String } var file_hello_proto_depIdxs = []int32{ 0, // [0:0] is the sub-list for method output_type 0, // [0:0] is the sub-list for method input_type 0, // [0:0] is the sub-list for extension type_name 0, // [0:0] is the sub-list for extension extendee 0, // [0:0] is the sub-list for field type_name } func init() { file_hello_proto_init() } func file_hello_proto_init() { if File_hello_proto != nil { return } if !protoimpl.UnsafeEnabled { file_hello_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} { switch v := v.(*String); i { case 0: return &v.state case 1: return &v.sizeCache case 2: return &v.unknownFields default: return nil } } } type x struct{} out := protoimpl.TypeBuilder{ File: protoimpl.DescBuilder{ GoPackagePath: reflect.TypeOf(x{}).PkgPath(), RawDescriptor: file_hello_proto_rawDesc, NumEnums: 0, NumMessages: 1, NumExtensions: 0, NumServices: 0, }, GoTypes: file_hello_proto_goTypes, DependencyIndexes: file_hello_proto_depIdxs, MessageInfos: file_hello_proto_msgTypes, }.Build() File_hello_proto = out.File file_hello_proto_rawDesc = nil file_hello_proto_goTypes = nil file_hello_proto_depIdxs = nil } 注意:
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