C++如何使用protobuf_C++数据序列化与protobuf库实践

<font face="Courier New"><strong>syntax</strong> = "proto3";
<strong>package</strong> tutorial;

message Person {
  string name = 1;
  int32 age = 2;
  string email = 3;
}
</font>

<font face="Courier New">protoc --cpp_out=. person.proto
</font>

<font face="Courier New">#include <iostream>
#include <fstream>
#include "person.pb.h"

int main() {
    // 设置日志输出（可选）
    google::protobuf::LogToStderr();

    tutorial::Person person;
    person.set_name("Alice");
    person.set_age(30);
    person.set_email("alice@example.com");

    // 序列化到文件
    std::ofstream output("person.data", std::ios::binary);
    if (!person.SerializeToOstream(&output)) {
        std::cerr << "序列化失败！" << std::endl;
        return -1;
    }
    output.close();

    // 从文件反序列化
    tutorial::Person restored_person;
    std::ifstream input("person.data", std::ios::binary);
    if (!restored_person.ParseFromIstream(&input)) {
        std::cerr << "反序列化失败！" << std::endl;
        return -1;
    }
    input.close();

    // 输出恢复的数据
    std::cout << "Name: " << restored_person.name() << std::endl;
    std::cout << "Age: " << restored_person.age() << std::endl;
    std::cout << "Email: " << restored_person.email() << std::endl;

    return 0;
}
</font>

<font face="Courier New">g++ -o person_example person.pb.cc main.cpp -lprotobuf
</font>

<font face="Courier New">find_package(Protobuf REQUIRED)
target_link_libraries(your_target ${Protobuf_LIBRARIES})
</font>