【设计模式】——抽象工厂模式

#include <iostream>

using namespace std;
//用户类
class User
{
private:
    int _id;
    string _name;
private:
    void SetId(int id)
    {
        this->_id=id;
    }
    int GetId()
    {
        return this->_id;
    }
    void SetName(string name)
    {
        this->_name=name;
    }
    string GetName()
    {
        return this->_name;
    }
};
//IUser接口，用于客户端访问，解除与具体数据访问的耦合
class IUser
{
public:
    virtual void Insert(){}
    virtual void GetUser(){}
};
//SqlserverUser类，用于访问SQL Server的User
class SqlserverUser:public IUser
{
public:
    void Insert()
    {
        cout << "在SQL Server中给user表增加一条记录" << endl;
    }
    void GetUser()
    {
        cout << "在SQL Server中根据ID得到User表一条记录" << endl;
    }
};
//AccessUser类，用于访问Access的User
class AccessUser:public IUser
{
public:
    void Insert()
    {
        cout << "在SQL Server中给user表增加一条记录" << endl;
    }
    void GetUser()
    {
        cout << "在SQL Server中根据ID得到User表一条记录" << endl;
    }
};
//部门类
class Department
{
private:
    int _id;
    string _deptname;
private:
    void SetId(int id)
    {
        this->_id=id;
    }
    int GetId()
    {
        return this->_id;
    }
    void SetDeptname(string name)
    {
        this->_deptname=name;
    }
    string GetName()
    {
        return this->_deptname;
    }
};
//IDpedartment接口，用于客户端访问，解除与具体数据访问的耦合
class IDepartment
{
public:
    virtual void Insert(){}
    virtual void GetUser(){}
};
//SqlserverDepartment类，用于访问SQL Server的Department
class SqlserverDepartment:public IDepartment
{
public:
    void Insert()
    {
        cout << "在SQL Server中给Department表增加一条记录" << endl;
    }
    void GetUser()
    {
        cout << "在SQL Server中根据ID得到Department表一条记录" << endl;
    }
};
//AccessDepartment类，用于访问Access的Department
class AccessDepartment:public IDepartment
{
public:
    void Insert()
    {
        cout << "在Access中给Department表增加一条记录" << endl;
    }
    void GetUser()
    {
        cout << "在Access中根据ID得到Department表一条记录" << endl;
    }
};
//IFactory接口，定义一个创建访问Department表对象的抽象的工厂接口
class IFactory
{
public:
     virtual IUser *CreateUser()=0;
     virtual IDepartment *CreateDepartment()=0;
};
//SqlServerFactory类，实现IFactory接口，实例化SqlserverUser和SqlserverDepartment
class SqlServerFactory:public IFactory
{
public:
    IUser *CreateUser()
    {
        return new SqlserverUser();
    }
    IDepartment *CreateDepartment()
    {
        return new SqlserverDepartment();
    }
};
//AccessFactory类，实现IFactory接口，实现AccessUser和AccessDepartment
class AccessFactory:public IFactory
{
public:
    IUser *CreateUser()
    {
        return new AccessUser();
    }
    IDepartment *CreateDepartment()
    {
        return new AccessDepartment();
    }
};
int main()
{
    User *user=new User();
    Department *dept=new Department();
    IFactory *factory=new AccessFactory();
    IUser *iu=factory->CreateUser();
    iu->Insert();
    iu->GetUser();
    IDepartment *id=factory->CreateDepartment();
    id->Insert();
    id->GetUser();
    return 0;
}