Golang语言下使用Protocol Buffer教程

syntax = "proto3"; //声明使用proto3协议
package test; //包名,通过protoc生成go文件
enum PhoneType{
 HOME = 0;
 WORK = 1;
}
message Phone{ //消息定义的关键字
 PhoneType type = 1;
 string number = 2;
}
message Person{
 int32 id = 1;
 string name = 2;
 repeated Phone phones = 3; //字段可以被重复任意多次(包括0次)
}
message ContactBook{
 repeated Person persons = 1;
}

> protoc --go_out=. *.proto

package main
import (
 "fmt"
 "io/ioutil"
 "os"
 "pftest/pf"
 "pftest/github.com/golang/protobuf/proto"
)
func write() {
 p1 := &pf.Person{
 Id: 1,
 Name: "小张",
 Phones: []*pf.Phone{
 {pf.PhoneType_HOME, "11111111"},
 {pf.PhoneType_WORK, "22222222"},
 },
 }
 p2 := &pf.Person{
 Id: 2,
 Name: "小王",
 Phones: []*pf.Phone{
 {pf.PhoneType_HOME, "33333333"},
 {pf.PhoneType_WORK, "44444444"},
 },
 }
 p3 := &pf.Person{
 Id: 3,
 Name: "小李",
 Phones: []*pf.Phone{
 {pf.PhoneType_HOME,"55555555"},
 {pf.PhoneType_WORK,"66666666"},
 },
 }
 book := &pf.ContactBook{}
 book.Persons = append(book.Persons, p1)
 book.Persons = append(book.Persons, p2)
 book.Persons = append(book.Persons, p3)
 data, _ := proto.Marshal(book)
 ioutil.WriteFile("./test.txt", data, os.ModePerm)
}
func read() {
 date, _ := ioutil.ReadFile("./test.txt")
 book := &pf.ContactBook{}
 proto.Unmarshal(date, book)
 for _, v := range book.Persons {
 fmt.Println(v.Id, v.Name)
 for _, vv := range v.Phones {
 fmt.Println(vv.Type, vv.Number)
 }
 }
}
func main() {
 write()
 read()
}