《大话设计模式》java实现之抽象工厂模式

最新推荐文章于 2022-06-01 23:00:46 发布

原创最新推荐文章于 2022-06-01 23:00:46 发布 · 389 阅读

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文章标签：

#设计模式 #抽象工厂模式

本文介绍抽象工厂模式的应用，通过创建AccessFactory和SqlServerFactory两个具体工厂实现不同数据库环境下User和Department对象的创建与插入操作。该模式针对产品族设计，允许系统在不修改代码的情况下选择使用哪一组产品。

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如前面所说，抽象工厂模式是针对产品族概念，一个factory对应多个产品的情况
UML图
这里写图片描述
代码结构

public class AccessDepartment implements IDepartment {

    @Override
    public void insert(Departmen departmen) {
        System.out.println("在Access中给Department表增加一条记录");
    }

}

public class AccessFactory implements IFactory {

    @Override
    public IUser createUser() {
        return new AccessUser();
    }

    @Override
    public IDepartment createDepartment() {
        return new AccessDepartment();
    }

}

public class AccessUser implements IUser {

    @Override
    public void insert(User user) {
        System.out.println("在Access中给User表增加一条记录");
    }

}

public class Client {
    public static void main(String[] args) {
        User user = new User();
        Departmen departmen = new Departmen();

        //IFactory factory = new SqlServerFactory();
        IFactory factory = new AccessFactory();

        IUser iUser = factory.createUser();
        iUser.insert(user);

        IDepartment iDepartment = factory.createDepartment();
        iDepartment.insert(departmen);
    }
}

public class Departmen {
    private int id;
    private String deptName;
}

public interface IDepartment {
    void insert(Departmen departmen);
}

public interface IFactory {
    IUser createUser();

    IDepartment createDepartment();
}

public interface IUser {
    void insert(User user);
}

public class SqlServerDepartment implements IDepartment {


    @Override
    public void insert(Departmen departmen) {
        System.out.println("在SQL Server中给Department表增加一条记录");
    }


}

public class SqlServerFactory implements IFactory {

    @Override
    public IUser createUser() {
        return new SqlServerUser();
    }

    @Override
    public IDepartment createDepartment() {
        return new SqlServerDepartment();
    }

}

public class SqlServerUser implements IUser {

    @Override
    public void insert(User user) {
        System.out.println("在SQL Server中给User表增加一条记录");
    }

}

public class User {
    private int id;
    private String name;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

}

运行结果
这里写图片描述