对象序列化实验

电子科技大学实验报告学生姓名：学号：指导教师：实验地点：实验时间：2011.12.14 一、实验室名称：Linux环境高级编程实验室二、实验项目名称：对象序列化实验三、实验学时：8学时四、实验目的：熟悉基本的对象序列化方法五、实验内容：共进行5个版本的开发：●版本1：将一个类的一个对象序列化到文件●版本2：将一个类的多个对象序列化到文件●版本3：将两个类的多个对象序列化到文件●版本4：按照面向对象的方法，解决多个类的多个对象序列化到文件的问题●版本5：序列化的目的地不仅可以是文件，还可以是其他，即可配置性六、实验步骤：实验一：Test_1.cpp:#include <fcntl.h>#include <vector>#include <iostream>using namespace std; //指定名字空间class test_1{private:int x;public:test_1(){int x = 0;}explicit test_1(int y){x = y;}virtual ~test_1() //虚函数{}public:void file(){cout << "in file(): " << x << endl;}public:bool Serialize(const char *path) const //序列化部分{int fd = open(path, O_RDWR | O_CREAT | O_TRUNC, 0); //打开experiment文件if(-1 == fd)return false;if(write(fd, &x, sizeof(int)) == -1)//写文件{close(fd);return false;}if(::close(fd) == -1)//关闭文件return false;return true;}bool Deserialize(const char *path) //反序列化部分{int fd = open(path, O_RDWR);//if(-1 == fd)return false;int red = read(fd, &x, sizeof(int));//只序列化一个值if(-1 == red){close(fd);return false;}if(close(fd) == -1)return false;return true;}};int main(){{test_1 ex(1314);ex.Serialize("recored.txt");}test_1 ex;ex.Deserialize("recored.txt");ex.file();}return 0;}运行结果：如图1所示图1：test_1运行结果实验二：Test_2.cpp:#include <fcntl.h>#include <vector>#include <iostream>using namespace std;class test_2{private:int x;public:test_2(){int x = 0;}explicit test_2(int y){x = y;}virtual ~test_2(){}public:void file(){cout << "in file(): " << x << endl;//显示x值public:bool Serialize(const char *Path) const{int fd = open(Path, O_RDWR | O_CREAT | O_TRUNC, 0);//打开文件if(-1 == fd)return false;if(Serialize(fd) == false)//函数重载{close(fd);return false;}if(close(fd) == -1)return false;return true;}bool Deserialize(const char *Path){int fd = open(Path, O_RDWR);if(-1 == fd)return false;if(Deserialize(fd) == false){close(fd);return false;}if(close(fd) == -1)return false;return true;}bool Serialize(int fd) const{if(-1 == fd)return false;if(write(fd, &x, sizeof(int)) == -1)//x值写入文件return false;return true;}bool Deserialize(int fd){if(-1 == fd)return false;int rd = read(fd, &x, sizeof(int));//读出文件中的x值if((0 == rd) || (-1 == rd))return false;return true;}};class SerializerFortest_2{public:SerializerFortest_2(){}virtual ~SerializerFortest_2(){}public:bool Serialize(const char *Path, const vector<test_2>& vec){int fd = open(Path, O_RDWR | O_CREAT | O_APPEND, 0);//打开文件if(-1 == fd)return false;for(int x= 0; x < vec.size(); x++)//写入数组{vec[x].Serialize(fd);}close(fd);return true;}bool Deserialize(const char *Path, vector<test_2>& vec){int fd = open(Path, O_RDWR);if(-1 == fd)return false;for(;;){test_2 ex;if(ex.Deserialize(fd) == true)//读出数组{vec.push_back(ex);}elsebreak;}close(fd);return true;}};int main(){{test_2 ex1(6), ex2(7), ex3(9);//序列化数组vector<test_2> vec;vec.push_back(ex1);vec.push_back(ex2);vec.push_back(ex3);SerializerFortest_2 ser;ser.Serialize("record.txt", vec);}{SerializerFortest_2 ser;//反序列化vector<test_2> vec;ser.Deserialize("record.txt", vec);for(int x = 0; x < 3; x++){vec[x].file();}}return 0;}运行结果如图2所示：图2：test_2运行结果实验三：Test_3.cpp:#include <fcntl.h>#include <vector>#include <iostream>using namespace std;class test_A{private:int x;public:test_A(){int x = 0;}explicit test_A(int y){x = y;}virtual ~test_A(){}public:void file(){cout<<"in file(): "<<x<<endl;}public:bool Serialize(int fd){if(-1 == fd)return false;if(::write(fd, &x, sizeof(int)) == -1)return false;return true;}bool Deserialize(int fd){if(-1 == fd)return false;int rd = read(fd, &x, sizeof(int));if((0 == rd) || (-1 == rd))return false;return true;}};class test_B{private:int x;int y;public:test_B(){x = 0;y = 0;}explicit test_B(int k){x = k;y = k + 1;}virtual ~test_B(){}public:void file(){cout<<"in file(): "<<x<<" "<<y<< endl;}public:bool Serialize(int fd){if(-1 == fd)return false;if(write(fd, &x, sizeof(int)) == -1)return false;if(write(fd, &y, sizeof(int)) == -1)return false;return true;}bool Deserialize(int fd){if(-1 == fd)return false;int rd = read(fd, &x, sizeof(int));if((0 == rd) || (-1 == rd))return false;rd = read(fd, &y, sizeof(int));if((0 == rd) || (-1 == rd))return false;return true;}};struct Serialized{int nType; //0 for test_A; 1 for test_Bvoid *pObj;};class Serializer{public:bool Serialize(const char *Path,std::vector<Serialized> &vec){int fd = open(Path, O_RDWR | O_CREAT | O_TRUNC, 0);if(-1 == fd)return false;for(int x = 0; x < vec.size(); x++){if(write(fd, &(vec[x].nType), 4) == -1){close(fd);return false;}if(0 == vec[x].nType){test_A *p = (test_A *)(vec[x].pObj);if(p->Serialize(fd) == false)return false;}else if(1 == vec[x].nType){test_B *p = (test_B *)(vec[x].pObj);if(p->Serialize(fd) == false)return false;}}if(close(fd) == -1)return false;return true;}bool Deserialize(const char *Path,std::vector<Serialized>& vec) {int fd = open(Path, O_RDWR);if(-1 == fd)return false;for(;;){int nType;int rd = read(fd, &nType, 4);if((-1 == rd) || (0 == rd))break;if(0 == nType){test_A *p;p = new test_A();p->Deserialize(fd);Serialized s;s.nType = nType;s.pObj = p;vec.push_back(s);}else if(1 == nType){test_B *p;p = new test_B();p->Deserialize(fd);Serialized s;s.nType = nType;s.pObj = p;vec.push_back(s);}}if(close(fd) == -1)return false;return true;}};int main(){{test_A ex1(2);Serialized s1;s1.nType = 0;s1.pObj = &ex1;test_B b1(3);Serialized s2;s2.nType = 1;s2.pObj = &b1;test_B b2(4);Serialized s3;s3.nType = 1;s3.pObj = &b2;test_A ex2(5);Serialized s4;s4.nType = 0;s4.pObj = &ex2;std::vector<Serialized> vec;vec.push_back(s1);vec.push_back(s2);vec.push_back(s3);vec.push_back(s4);Serializer s;s.Serialize("data", vec);}{Serializer s;std::vector<Serialized> vec;s.Deserialize("data", vec);for(int x = 0; x < vec.size(); x++){if(vec[x].nType == 0){test_A *p = (test_A *)(vec[x].pObj);p->file();}else if(vec[x].nType == 1){test_B *p = (test_B *)(vec[x].pObj);p->file();}}}return 0;}运行结果如图3所示：图3：test_3运行结果实验四：Test_4.cpp:#include <fcntl.h>#include <iostream>#include <vector>using namespace std;class testSerializable//序列化虚类{public:virtual bool Serialize(int fd) = 0;virtual testSerializable* Deserialize(int fd) = 0;virtual bool GetType(int& type) = 0;public:testSerializable(){}virtual ~testSerializable(){};class test_1 : public testSerializable{private:int i;public:test_1(){i = 0;}explicit test_1(int j){i = j;}virtual ~test_1(){}public:void file(){std::cout << "in file(): " << i << std::endl;}public:virtual bool GetType(int& type){type = 0;return true;}virtual bool Serialize(int fd){if(-1 == fd)return false;if(::write(fd, &i, sizeof(int)) == -1)//序列化return false;return true;virtual testSerializable* Deserialize(int fd)//反序列化{if(-1 == fd)return NULL;test_1 *p = new test_1();int r = ::read(fd, &(p->i), sizeof(int));if((0 == r) || (-1 == r)){delete p;return NULL;}return p;}};class test_2 : public testSerializable{private:int i;int j;public:test_2(){i = 0;j = 0;}explicit test_2(int k){i = k;j = k + 1;}virtual ~test_2(){}public:void file(){std::cout << "in file(): " << i << " " << j << std::endl;}public:virtual bool GetType(int& type){type = 1;return true;}virtual bool Serialize(int fd)//写入多个对象{if(-1 == fd)return false;if(::write(fd, &i, sizeof(int)) == -1)return false;if(::write(fd, &j, sizeof(int)) == -1)return false;return true;}virtual testSerializable* Deserialize(int fd){if(-1 == fd)return NULL;test_2 *p = new test_2();int r = ::read(fd, &(p->i), sizeof(int));if((0 == r) || (-1 == r)){delete p;return NULL;}r = ::read(fd, &(p->j), sizeof(int));if((0 == r) || (-1 == r)){delete p;return NULL;}return p;}};class CLSerializer{private:std::vector<testSerializable*> m_vSerialized;public:bool Serialize(const char *pFilePath, std::vector<testSerializable*>& v) {int fd = ::open(pFilePath, O_RDWR | O_CREAT | O_TRUNC, 0);if(-1 == fd)return false;for(int i = 0; i < v.size(); i++){int type;v[i]->GetType(type);if(::write(fd, &type, 4) == -1){::close(fd);return false;}v[i]->Serialize(fd);}if(::close(fd) == -1)return false;return true;}bool Deserialize(const char *pFilePath, std::vector<testSerializable*>& v) {int fd = ::open(pFilePath, O_RDWR);if(-1 == fd)return false;for(;;){int nType;int r = ::read(fd, &nType, 4);if((-1 == r) || (0 == r))break;int type;for(int i = 0; i < m_vSerialized.size(); i++){m_vSerialized[i]->GetType(type);if(type == nType){testSerializable *p = m_vSerialized[i]->Deserialize(fd);if(p != NULL)v.push_back(p);}}if(::close(fd) == -1)return false;return true;}void Register(testSerializable *pSerialized){m_vSerialized.push_back(pSerialized);}};int main(){{test_1 ex1(2);test_2 e1(3);test_2 e2(4);test_1 ex2(5);std::vector<testSerializable*> v;v.push_back(&ex1);v.push_back(&e1);v.push_back(&e2);v.push_back(&ex2);CLSerializer s;s.Serialize("data", v);}{CLSerializer s;test_1 a;test_2 b;s.Register(&a);s.Register(&b);std::vector<testSerializable*> v;s.Deserialize("data", v);for(int i = 0; i < v.size(); i++)test_1 *p = dynamic_cast<test_1 *>(v[i]);if(p != NULL)p->file();test_2 *q = dynamic_cast<test_2 *>(v[i]);if(q != NULL)q->file();}}return 0;}运行结果如图4所示：图4：test_4运行结果实验五：Test_5.cpp:#include <fcntl.h>#include <iostream>#include <vector>#include <strings.h>#include <stdio.h>class ILSerializable//虚类{public:virtual bool Serialize(int fd) = 0;virtual ILSerializable* Deserialize(int fd) = 0;virtual bool GetType(int& type) = 0;public:ILSerializable(){}virtual ~ILSerializable(){}};class A : public ILSerializable{private:int i;public:A(){i = 0;}explicit A(int j){i = j;}virtual ~A(){}public:void f(){std::cout << "in f(): " << i << std::endl;}public:virtual bool GetType(int& type){type = 0;return true;}virtual bool Serialize(int fd)//文件可配置{if(-1 == fd)return false;if(::write(fd, &i, sizeof(int)) == -1)return false;return true;}virtual ILSerializable* Deserialize(int fd)if(-1 == fd)return NULL;A *p = new A();int r = ::read(fd, &(p->i), sizeof(int));//此处反序列化if((0 == r) || (-1 == r)){delete p;return NULL;}return p;}};class B : public ILSerializable{private:int i;int j;public:B(){i = 0;j = 0;}explicit B(int k){i = k;j = k + 1;}virtual ~B(){}public:void f(){std::cout << "in f(): " << i << " " << j << std::endl;}public:virtual bool GetType(int& type)//定义B类的标示符type = 1;return true;}virtual bool Serialize(int fd){if(-1 == fd)return false;if(::write(fd, &i, sizeof(int)) == -1)return false;if(::write(fd, &j, sizeof(int)) == -1)return false;return true;}virtual ILSerializable* Deserialize(int fd){if(-1 == fd)return NULL;B *p = new B();int r = ::read(fd, &(p->i), sizeof(int));if((0 == r) || (-1 == r)){delete p;return NULL;}r = ::read(fd, &(p->j), sizeof(int));if((0 == r) || (-1 == r)){delete p;return NULL;}return p;}};class CLSerializer{private:std::vector<ILSerializable*> m_vSerialized;public:bool Serialize(const char *pFilePath, std::vector<ILSerializable*>& v)int fd = ::open(pFilePath, O_RDWR | O_CREAT | O_TRUNC, 0);if(-1 == fd)return false;for(int i = 0; i < v.size(); i++){int type;v[i]->GetType(type);if(::write(fd, &type, 4) == -1)//写入类别{::close(fd);return false;}v[i]->Serialize(fd);}if(::close(fd) == -1)return false;return true;}bool Deserialize(const char *pFilePath, std::vector<ILSerializable*>& v) {int fd = ::open(pFilePath, O_RDWR);if(-1 == fd)return false;for(;;){int nType;int r = ::read(fd, &nType, 4);if((-1 == r) || (0 == r))break;int type;for(int i = 0; i < m_vSerialized.size(); i++){m_vSerialized[i]->GetType(type);if(type == nType)//判断类别{ILSerializable *p = m_vSerialized[i]->Deserialize(fd);if(p != NULL)v.push_back(p);}}}if(::close(fd) == -1)return false;return true;}void Register(ILSerializable *pSerialized)//注册{m_vSerialized.push_back(pSerialized);}};char* fcompent(char *pFilePath){//char pFilePath[100];std::cout<<"Input filepath:";scanf("%s",pFilePath);return pFilePath;}/*class FileOperotor{private:public:int nopen( char*,int);int nclose(int);int nwrite(int fp,char* buffer,int size);int nread(int fp,char* buffer,int size);};*/int main(){char pFilePath[100];{if(fcompent(pFilePath) == NULL)//获取用户配置的路径{std::cout<<"has no: %s!\n";return -1;}}{A a1(2);B b1(3);B b2(4);A a2(5);std::vector<ILSerializable*> v;v.push_back(&a1);v.push_back(&b1);v.push_back(&b2);v.push_back(&a2);CLSerializer s;s.Serialize(pFilePath, v);}{CLSerializer s;A a;B b;s.Register(&a);s.Register(&b);std::vector<ILSerializable*> v;s.Deserialize("data", v);for(int i = 0; i < v.size(); i++){A *p = dynamic_cast<A *>(v[i]);if(p != NULL)p->f();B *q = dynamic_cast<B *>(v[i]);if(q != NULL)q->f();}}return 0;}运行结果如图5所示：图5：test_5运行结果七、总结及心得体会：通过本次实验，了解、学习和实践了序列化单个对象，一个类中的多个对象，不同类中的多个对象以及序列化不同的位置等相关内容，以及相关的编程技巧。