C++怎么进行Protobuf序列化与反序列化_C++高性能数据交换与gRPC基础

syntax = "proto3";

message Person {
    string name = 1;
    int32 age = 2;
    string email = 3;
}

protoc --cpp_out=. person.proto

#include "person.pb.h"
#include <fstream>

int main() {
    Person person;
    person.set_name("Alice");
    person.set_age(30);
    person.set_email("alice@example.com");

    std::string buffer;
    if (!person.SerializeToString(&buffer)) {
        return -1; // 序列化失败
    }

    // 也可以写入文件
    std::ofstream output("person.bin", std::ios::binary);
    person.SerializeToOstream(&output);
    output.close();

    return 0;
}

#include "person.pb.h"
#include <fstream>
#include <iostream>

int main() {
    Person person;

    // 从文件读取
    std::ifstream input("person.bin", std::ios::binary);
    if (!person.ParseFromIstream(&input)) {
        std::cerr << "Failed to parse person." << std::endl;
        return -1;
    }
    input.close();

    // 或从字符串解析
    // std::string buffer = ...;
    // person.ParseFromString(buffer);

    std::cout << "Name: " << person.name() << std::endl;
    std::cout << "Age: " << person.age() << std::endl;
    std::cout << "Email: " << person.email() << std::endl;

    return 0;
}

service PersonService {
    rpc GetPerson (PersonRequest) returns (Person);
    rpc AddPerson (Person) returns (AddResponse);
}