环境搭建

安装 protobuf 编译器

https://github.com/protocolbuffers/protobuf/releases
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解压，将bin目录加入环境变量

安装 protocol-gen-go 生成器

用于生成Go代码
https://github.com/protocolbuffers/protobuf-go/releases
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解压，将可执行文件加入到环境变量内

或使用go install github.com/protocolbuffers/protobuf-go@latest 直接安装

使用Goland

创建项目example
并且执行 go mod init example

安装Protocol Buffers插件

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创建user.proto文件

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syntax = "proto3"; // 指定该文件 proto语法版本，目前有2,3

// option go_package = "path;name"; path 表示生成的go文件的存放地址，会自动生成目录
// name 表示生成的文件所属的包名
option go_package = "./service";


// 指定文件生成后的package
package service;

// 通信用的消息
message User {
  string name = 1;
  int32  aga = 2;
}

打开命令行

输入 protoc --go_out=./ ./user.proto 为user.proto生成Go代码
此时目录结构为：
在这里插入图片描述
user.pb.go文件为生成文件

// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// 	protoc-gen-go v1.28.1
// 	protoc        v3.21.12
// source: user.proto

// 指定文件生成后的package

package service

import (
	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)
)

// 通信用的消息
type User struct {
	state         protoimpl.MessageState
	sizeCache     protoimpl.SizeCache
	unknownFields protoimpl.UnknownFields

	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
	Aga  int32  `protobuf:"varint,2,opt,name=aga,proto3" json:"aga,omitempty"`
}

func (x *User) Reset() {
	*x = User{}
	if protoimpl.UnsafeEnabled {
		mi := &file_user_proto_msgTypes[0]
		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
		ms.StoreMessageInfo(mi)
	}
}

func (x *User) String() string {
	return protoimpl.X.MessageStringOf(x)
}

func (*User) ProtoMessage() {}

func (x *User) ProtoReflect() protoreflect.Message {
	mi := &file_user_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 User.ProtoReflect.Descriptor instead.
func (*User) Descriptor() ([]byte, []int) {
	return file_user_proto_rawDescGZIP(), []int{0}
}

func (x *User) GetName() string {
	if x != nil {
		return x.Name
	}
	return ""
}

func (x *User) GetAga() int32 {
	if x != nil {
		return x.Aga
	}
	return 0
}

var File_user_proto protoreflect.FileDescriptor

var file_user_proto_rawDesc = []byte{
	0x0a, 0x0a, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x07, 0x73, 0x65,
	0x72, 0x76, 0x69, 0x63, 0x65, 0x22, 0x2c, 0x0a, 0x04, 0x55, 0x73, 0x65, 0x72, 0x12, 0x12, 0x0a,
	0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d,
	0x65, 0x12, 0x10, 0x0a, 0x03, 0x61, 0x67, 0x61, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x52, 0x03,
	0x61, 0x67, 0x61, 0x42, 0x0b, 0x5a, 0x09, 0x2e, 0x2f, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65,
	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
}

var (
	file_user_proto_rawDescOnce sync.Once
	file_user_proto_rawDescData = file_user_proto_rawDesc
)

func file_user_proto_rawDescGZIP() []byte {
	file_user_proto_rawDescOnce.Do(func() {
		file_user_proto_rawDescData = protoimpl.X.CompressGZIP(file_user_proto_rawDescData)
	})
	return file_user_proto_rawDescData
}

var file_user_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
var file_user_proto_goTypes = []interface{}{
	(*User)(nil), // 0: service.User
}
var file_user_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_user_proto_init() }
func file_user_proto_init() {
	if File_user_proto != nil {
		return
	}
	if !protoimpl.UnsafeEnabled {
		file_user_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
			switch v := v.(*User); 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_user_proto_rawDesc,
			NumEnums:      0,
			NumMessages:   1,
			NumExtensions: 0,
			NumServices:   0,
		},
		GoTypes:           file_user_proto_goTypes,
		DependencyIndexes: file_user_proto_depIdxs,
		MessageInfos:      file_user_proto_msgTypes,
	}.Build()
	File_user_proto = out.File
	file_user_proto_rawDesc = nil
	file_user_proto_goTypes = nil
	file_user_proto_depIdxs = nil
}

执行go mod tidy 拉取依赖

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user.pb.go很显然，不让我们手动编辑

序列化与反序列化

创建main.go文件

package main

import (
	"example/service"
	"fmt"
	"google.golang.org/protobuf/proto"
)

func main() {
	user := &service.User{
		Name: "张三",
		Age:  20,
	}

	// 序列化
	bys, err := proto.Marshal(user)
	if err != nil {
		panic(err)
	}

	// 反序列化

	user1 := &service.User{}
	err = proto.Unmarshal(bys, user1)
	if err != nil {
		panic(err)
	}

	fmt.Println(user1)

}