面试题整理-C++ 序列化对象

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题目：在C++里面，两台机器之间的函数相互调用，需要传递对象。采用什么样的方法可以把C++对象序列化之后，在两台机器之间，像字符串一样传输。解法：想到boost库中是有一个序列化类的。在这里，我们直接利用这个类来进行处理。

#include <fstream>#include <sstream>#include <iostream>#include <boost/archive/text_oarchive.hpp>#include <boost/archive/text_iarchive.hpp>using namespace std;class gps_position{private:    friend class boost::serialization::access;    template<class Archive>    void serialize(Archive & ar, const unsigned int version)    {       ar & degrees;       ar & minutes;       ar & seconds;    }    int degrees;    int minutes;    float seconds;public:    gps_position()    {       degrees = 0;       minutes = 0;       seconds = 0.0;    };    gps_position(int d, int m, float s) :    degrees(d), minutes(m), seconds(s)    {}};class bus_stop{    friend class boost::serialization::access;    template<class Archive>    void serialize(Archive & ar, const unsigned int version)    {       ar & latitude;       ar & longitude;    }    gps_position latitude;    gps_position longitude;public:    bus_stop(){ }    bus_stop(const gps_position & lat_, const gps_position & long_) :        latitude(lat_), longitude(long_){ }    virtual ~bus_stop(){ }}; class bus_stop_corner : public bus_stop{    friend class boost::serialization::access;    template<class Archive>    void serialize(Archive & ar, const unsigned int version)    {       ar & boost::serialization::base_object<bus_stop>(*this);       ar & street1;       ar & street2;    }    std::string street1;    std::string street2;public:    bus_stop_corner(){}    bus_stop_corner(const gps_position & lat_, const gps_position & long_,       const std::string & s1_, const std::string & s2_       ) :    bus_stop(lat_, long_), street1(s1_), street2(s2_)    {}    virtual std::string description() const    {       return street1 + " and " + street2;    }};int main() {    const gps_position latitude(1, 2, 3.3f);    const gps_position longitude(4, 5, 6.6f);    bus_stop_corner stop_corner(latitude, longitude, "corn1", "corn2");    ostringstream ostr;    {       boost::archive::text_oarchive oa(ostr);       oa << stop_corner;    }    string comment = ostr.str();    cout << comment << endl;    istringstream iis(comment);    bus_stop_corner new_stop_corner;    {       istringstream istr;       boost::archive::text_iarchive ia(iis);       ia >> new_stop_corner;    }    return 0;}

这里使用的是boost的序列化操作。

首先安装boost库。

apt-get install libboost1.48-all-dev

编译

g++ test.cpp -o test -lboost_serialization