syntax = "proto2";

package message;

message Orders {

required int32 order_id=;

required string title=;

}

mkdir $GOPATH/src/message;protoc --go_out $GOPATH/src/message orders.proto 

package main

import "message"

import "github.com/golang/protobuf/proto"

import "fmt"

func main() {

    orders := &message.Orders{

        OrderId: proto.Int32(),

        Title:   proto.String("第一个订单"),

    }

    //序列化成二进制数据

    ordersBytes, _ := proto.Marshal(orders)

    //反序列化二进制数据

    twoOrders := &message.Orders{}

    proto.Unmarshal(ordersBytes, twoOrders)

    fmt.Println(twoOrders.GetTitle())

    fmt.Println(twoOrders.GetOrderId())

}