简单工厂改进抽象工厂（大话设计模式C++实现）

Bertha 。 2022-09-11 04:24 159阅读 0赞

类图如下：

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAemhhbmdodWFpY2hhbw_size_20_color_FFFFFF_t_70_g_se_x_16][]

代码如下：

#include<iostream>
    #include<string>
    using namespace std;
    
    //数据库  有Sqlserver  Access 两个
    //表 两个  有User表，Department表，
    //假设只有两个字段，name和id
    //两个数据单独定义两个类  User Department
    //对数据不进行具体处理，只是进行打印
    
    class User{
    public:
        void SetID(int id){
            m_id=id;
        }
        int GetID(){
            return m_id;
        }
        void SetName(string name){
            m_name=name;
        }
        string GetName(){
            return m_name;
        }
    private:
        int m_id;
        string m_name;
    };
    
    class Department{
    public:
        void SetID(int id){
            m_id=id;
        }
        int GetID(){
            return m_id;
        }
        void SetName(string name){
            m_name=name;
        }
        string GetName(){
            return m_name;
        }
    private:
        int m_id;
        string m_name;
    };
    
    class IUser{
    public:
        virtual void Insert(User user)=0;
        virtual User GetUser(int id)=0;
        virtual ~IUser(){
    
        }
    };
    
    class SqlserverUser:public IUser{
    public:
         void Insert(User user){
            cout<<"在Sqlserver 中给User表增加一条记录\n";
        }
         User GetUser(int id){
             cout<<"在Sqlserver 中根据ID 得到User表一条记录\n";
             User temp;
             return temp;
        }
    };
    
    class AccessUser:public IUser{
    public:
        void Insert(User user){
            cout<<"在Access 中给User表增加一条记录\n";
        }
        User GetUser(int id){
            cout<<"在Access 中根据ID 得到User表一条记录\n";
            User temp;
            return temp;
        }
    };
    
    class IDepartment{
    public:
        virtual void Insert(Department user)=0;
        virtual Department GetDepartment(int id)=0;
        virtual ~IDepartment(){
    
        }
    };
    
    class SqlserverDepartment:public IDepartment{
    public:
        void Insert(Department user){
            cout<<"在Sqlserver 中给Department表增加一条记录\n";
        }
        Department GetDepartment(int id){
            cout<<"在Sqlserver 中根据ID 得到Department表一条记录\n";
            Department temp;
            return temp;
        }
    };
    
    class AccessDepartment:public IDepartment{
    public:
        void Insert(Department user){
            cout<<"在Access 中给Department表增加一条记录\n";
        }
        Department GetDepartment(int id){
            cout<<"在Access 中根据ID 得到Department表一条记录\n";
            Department temp;
            return temp;
        }
    };
    
    
    //工厂类
    
    class SimpleFactory{
    public:
        SimpleFactory(){
            m_dbname="Sqlserver";
        }
        IUser* CreateUser(){
            if(m_dbname=="Sqlserver")
                return new SqlserverUser();
            else if(m_dbname == "Access")
                return new AccessUser();
            else
                return NULL;
    
        }
        IDepartment* CreateDepartment(){
            if(m_dbname=="Sqlserver")
                return new SqlserverDepartment();
            else if(m_dbname == "Access")
                return new AccessDepartment();
            else
                return NULL;
        }
    private:
        string m_dbname;
    };
    
    
    
    
    
    int main(){
    User temp_user;
    Department temp_department;
    
    
    SimpleFactory *factory =new SimpleFactory();
    
    IUser*user =factory->CreateUser();
    IDepartment* department=factory->CreateDepartment();
    
    delete factory;
    
    user->Insert(temp_user);
    user->GetUser(1);
    
    delete user;
    
    department->Insert(temp_department);
    department->GetDepartment(1);
    
    delete department;
    
    }

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAemhhbmdodWFpY2hhbw_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/54e6f2b66eeb4589bfaf4386881b9712.png