Boost中支持序列化反序列化的库--boost.serialization

boost.serialization的特点
1.         支持XML和二进制两种形式

2.         支持类的版本号

3.         支持深度指针存储

4.         支持多个指针共享数据

5.         支持STL容器存储

6.         支持原生数组存储

7.         支持非侵入性的设计，序列化的类不需要继承特殊的类，不需要写特殊的方法（原来的类中要存储的属性必须共有）

我遇到的问题
1.         如果要存储STL容器，要引入头文件 #include <boost/serialization/vector.hpp>。

2.         如果之前引入了<windows.h>，编译会出错，原因是windows.h中定义了min,max宏，我们可以在#include<windows.h>之前把min,max禁止，使用#define NOMINMAX。或者使用#undef min和#undef max

我存在的疑问
XML中属性的意义尚不明确，手工添加数据可能有危险

XML中的类型用数字来表示，不知道读取原理，如果代码添加了新的类会不会对原有数据有影响

参考
详细说明见：$/boost_1_37_0/libs/serialization/doc/index.html

后面附了一个示例和一个生成的XML
附录A

///////////////////////////////////////////////

//file : .h

#pragma once

#include <vector>

#include <boost/serialization/base_object.hpp>

#include <boost/archive/text_oarchive.hpp>

#include <boost/archive/text_iarchive.hpp>

#include <boost/serialization/vector.hpp>

using namespace std;

class DBConfigItem

{

public:

DBConfigItem(const String& dsn,const String & usrName,const String & password,size_t connectCnt);

DBConfigItem(const DBConfigItem & item);

DBConfigItem();

~DBConfigItem();

private:

friend class boost::serialization::access;

template<class Archive>

void serialize(Archive & ar, const unsigned int version)

{

ar & BOOST_SERIALIZATION_NVP(dataSourceName);

ar & BOOST_SERIALIZATION_NVP(usrName);

ar & BOOST_SERIALIZATION_NVP(usrPassword);

ar & BOOST_SERIALIZATION_NVP(connectCount);

}

private:

String dataSourceName;

String usrName;

String usrPassword;

size_t connectCount;

};

//=====================================================================

class DBConfig

{

public:

DBConfig();

~DBConfig();

void create();

void destroy();

void readFromXml(const String & pathName);

void saveToXml(const String & pathName);

private:

friend class boost::serialization::access;

template<class Archive>

void serialize(Archive & ar, const unsigned int version)

{

ar & BOOST_SERIALIZATION_NVP(cfgItemList);

}

private:

typedef std::vector<DBConfigItem*>::iterator iterator;

vector< DBConfigItem * > cfgItemList;

};

/////////////////////////////////////////////////////////

file : cpp

#include <iomanip>

#include <iostream>

#include <fstream>

#include <boost/archive/tmpdir.hpp>

#include <boost/archive/xml_iarchive.hpp>

#include <boost/archive/xml_oarchive.hpp>

void DBConfig::readFromXml(const String & pathName)

{

// open the archive

std::ifstream ifs(pathName.c_str());

assert(ifs.good());

boost::archive::xml_iarchive ia(ifs);

// restore the schedule from the archive

//ia >> BOOST_SERIALIZATION_NVP(*this);

ia >> boost::serialization::make_nvp(BOOST_PP_STRINGIZE(config1), *this);

}

void DBConfig::saveToXml(const String & pathName)

{

// make an archive

std::ofstream ofs(pathName.c_str());

assert(ofs.good());

boost::archive::xml_oarchive oa(ofs);

oa << boost::serialization::make_nvp(BOOST_PP_STRINGIZE(config1), *this);

}
附录B

一个序列化后的XML文件

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

<!DOCTYPE boost_serialization (View Source for full doctype...)>

- <boost_serialization signature="serialization::archive" version="5">

-     <config1 class_id="0" tracking_level="0" version="0">

-          <cfgItemList class_id="1" tracking_level="0" version="0">

<count>3</count>

<item_version>0</item_version>

-                <item class_id="2" tracking_level="1" version="0" object_id="_0">

<dataSourceName>scott</dataSourceName>

<usrName>root</usrName>

<usrPassword>admin</usrPassword>

<connectCount>3</connectCount>

</item>

-                <item class_id_reference="2" object_id="_1">

<dataSourceName>scott</dataSourceName>

<usrName>root</usrName>

<usrPassword>admin</usrPassword>

<connectCount>3</connectCount>

</item>

<item class_id_reference="2" object_id_reference="_1" />

</cfgItemList>

</config1>

</boost_serialization>