c++ - 如何将二进制文件反序列化为对象？

Question

我使用这种方法来序列化我的对象:

void save(Obj& obj) {
    ofstream os("obj.dat", ofstream::binary);
    boost::archive::binary_oarchive ar(os, boost::archive::no_header);
    ar << boost::serialization::make_binary_object(&obj, sizeof(obj));
}

我的Obj load(string fileName)的代码是什么？

Answer 1

基本上与您拥有的相同:

Obj load(std::string const& filename) {
    std::ifstream is(filename, std::ios::binary);
    boost::archive::binary_iarchive ar(is, boost::archive::no_header);
    Obj obj;
    ar >> boost::serialization::make_binary_object(&obj, sizeof(obj));
    return obj;
}

当然，这是，假设您的类型可与make_binary_object一起使用:确保Obj可按位序列化(POD):

    static_assert(std::is_pod<Obj>::value, "Obj is not POD");

另外，重新考虑using namespace:Why is "using namespace std;" considered bad practice?