设计模式 抽象工厂方法

先写User 原型类

package User;

public class User {
    
    private int _id;
    private String _name;
    
    
    public int get_id() {
        return _id;
    }
    public void set_id(int _id) {
        this._id = _id;
    }
    public String get_name() {
        return _name;
    }
    public void set_name(String _name) {
        this._name = _name;
    }

     
}

在写User访问的具体接口

package User;
public interface IUser {
    void Insert(User user);
    User GetUser(int id); 
}

再写访问User的具体实现

package User;
public class AccessUser implements IUser {

    @Override
    public void Insert(User user) {
        // TODO Auto-generated method stub
        System.out.println("在access中给User表添加一条记录");
    }

    @Override
    public User GetUser(int id) {
        // TODO Auto-generated method stub
        System.out.println("在access中根据ID得到User一条记录");
        return null;
    }

}

package User;
public class SqlserverUser implements IUser {

    public void Insert(User user)
    {
        System.out.println("再sql server中给User表增加一条记录");
    }
    public User GetUser(int id)
    {
        System.out.println("在sql server中根据ID得到User表一条记录");
        return null;
    }

}

再写工厂方法类

package factory;
import User.IUser;

public interface IFactory {
    IUser CreateUser();
}

再写抽象方法的实现

package factory;

import User.IUser;
import User.SqlserverUser;

public class SqlServerFacory implements IFactory {

    @Override
    public IUser CreateUser() {
        // TODO Auto-generated method stub
        return new SqlserverUser();
    }

}

package factory;

import User.AccessUser;
import User.IUser;

public class AccessFactory implements IFactory {

    @Override
    public IUser CreateUser() {
        // TODO Auto-generated method stub
        return new AccessUser();
    }

}

再写测试类

import User.IUser;
import User.SqlserverUser;
import User.User;
import factory.IFactory;
import factory.SqlServerFacory;

public class program {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        User user=new User();
        IFactory factory=new SqlServerFacory();
        IUser iUser=factory.CreateUser();
        
        iUser.Insert(user);
        iUser.GetUser(1);
        
    }

}

转载于:https://www.cnblogs.com/yufenghou/p/6035652.html