c++/qt的數據序列化和反序列化

序列化以及反序列化的實現

---

 

struct Body

{

    double weight;

    double height;

};

//結構體

struct People

{

    int age;

    Body dBody;//結構體

    vector<QString> vecfamily;//vector

    //序列化

    friend QDataStream &operator<<(QDataStream& input,const People &iteam)

    {

        //vector 數據類型需要用vector<People>::fromStdVector 轉一下

        //如果是QList則不需要直接插入

        QVector<QString> strvecfamily = QVector<QString>::fromStdVector(iteam.vecfamily);

        input << iteam.age << iteam.dBody.height << iteam.dBody.weight\

              << strvecfamily;

        return input;

    }

    //反序列化

    friend QDataStream &operator>>(QDataStream& output,People& iteam)

    {

        QVector<QString> vecfamily;

        output >> iteam.age >>iteam.dBody.height >> iteam.dBody.weight >> vecfamily;

        iteam.vecfamily = vecfamily.toStdVector();

        return output;

    }
}；

---

數據的使用
People p1;

    p1.age = 12;

    p1.dBody.height = 150.8;

    p1.dBody.weight = 50;

    p1.vecfamily.push_back("sister");

    p1.vecfamily.push_back("mother");

    p1.vecfamily.push_back("father");

    QFile file("./stream.bat");

    if(!file.open(QIODevice::WriteOnly))

    {

        return ;

    }

    QDataStream input(&file);

    input << p1;

    file.close();

    People p2;

    QFile file1("./stream.bat");//.bat文件為二進制文件

    if(!file1.open(QIODevice::ReadOnly))

    {

        return ;

    }

    QDataStream output(&file1);

    output << p2;

    file.close();

    output >> p2;

    qDebug()<<p2.age<<p2.dBody.height<<p2.dBody.weight\

           <<p2.vecfamily;//結果12 150.8 50 std::vector("sister", "mother", "father")