WIN环境 下载与安装

下载

https://github.com/protocolbuffers/protobuf/releases
官方git地址，目前最新的是3.8版本；
我是c++环境，选择cpp下载包

protobuf-cpp-3.8.0.tar.gz

安装

解压后，打开protobuf-3.8.0\README.md 文件，里边明确指出了c++的安装参考文件：

Protocol Compiler Installation

The protocol compiler is written in C++. If you are using C++, please follow the C++ Installation Instructions to install protoc along with the C++ runtime.

链到如下文件：
protobuf-3.8.0\src\README.md

区分linux和win的安装方法；win又链到了另外一个文件：

To build from source using Microsoft Visual C++, see cmake/README.md.

protobuf-3.8.0\cmake\README.md

执行完最后一步安装后，会再并行目录生成一个\install文件夹，里边包含了win要用的库、头文件、pb转换工具 三项；

官方API指南

https://developers.google.cn/protocol-buffers/docs/reference/overview

protocol buffer 转json 方案

转json功能官方API

https://developers.google.cn/protocol-buffers/docs/reference/cpp/google.protobuf.util.json_util

.proto 文件编译方法及编译类生成的成员方法规律

https://developers.google.cn/protocol-buffers/docs/reference/cpp-generated

TMT.proto文件示例

syntax = "proto3";

package cmu_cmdp;
message CMU_TMt   
{   
    uint32 main_type = 1;   
    uint32 sub_type = 2; 
    uint32 mcu_id = 3;   
    uint32 eqp_id = 4; 
    uint32 confdri_id = 5;   
    uint32 conf_idx = 6; 
}

message CMU_TBasicConfInfo
{
    CMU_TMt speaker = 1;
	CMU_TMt chairman = 2;
	string e164str = 4;
	repeated CMU_TMt tmtarr = 6;
	reserved 3,5;
}

把.proto文件转成c++的.h.cc文件

启用cmd，调用安装时生成的protobuf.exe 可执行文件，执行命令 protobuf.exe --cpp_out=./ TMT.proto，会在本目录下生成对应的TMt.pb.h、TMt.pb.cc

c++实例代码

#include "TMt.pb.h" // 包含.proto生成的头文件
#include <google/protobuf/util/json_util.h>  // 要使用转json功能，需要包该头文件
using namespace std;
using namespace google::protobuf::util;  // 引入命名空间
using namespace cmu_cmdp;

int main()
{

       CMU_TMt tmt1;
       tmt1.set_conf_idx(1);
       tmt1.set_eqp_id(11);
       tmt1.set_main_type(9);
       tmt1.set_confdri_id(3);
       tmt1.set_mcu_id(33);
       tmt1.set_sub_type(7);

       CMU_TMt tmt2;
       tmt2.set_conf_idx(2);
       tmt2.set_eqp_id(22);
       tmt2.set_main_type(22);
       tmt2.set_confdri_id(2);
       tmt2.set_mcu_id(22);
       tmt2.set_sub_type(2);

       CMU_TBasicConfInfo cSimConfInfo;
       cSimConfInfo.set_allocated_speaker(&tmt1);
       cSimConfInfo.set_allocated_chairman(&tmt2);
       cSimConfInfo.set_e164str("0512110");
       CMU_TMt *ptmt = cSimConfInfo.add_tmtarr();
       *ptmt = tmt1;
       ptmt = cSimConfInfo.add_tmtarr();
       *ptmt = tmt2;

       std::string strmsg;
       MessageToJsonString(cSimConfInfo, &strmsg);  // 结构体转json
       cout << strmsg.c_str() << endl;

       CMU_TBasicConfInfo cSimConfInfo2;
       JsonStringToMessage(strmsg, &cSimConfInfo2);  // json 反转结构体
       cout << cSimConfInfo2.speaker().mcu_id() << endl;
       cout << cSimConfInfo2.chairman().mcu_id() << endl;
      return 0;
}

输出结果

{"speaker":{"mainType":9,"subType":7,"mcuId":33,"eqpId":11,"confdriId":3,"confIdx":1},"chairman":{"mainType":22,"subType":2,"mcuId":22,"eqpId":22,"confdriId":2,"confIdx":2},"e164str":"0512110","tmtarr":[{"mainType":9,"subType":7,"mcuId":33,"eqpId":11,"confdriId":3,"confIdx":1},{"mainType":22,"subType":2,"mcuId":22,"eqpId":22,"confdriId":2,"confIdx":2}]}

33

22