小菜成长记(六)——抽象工厂模式

一、抽象工厂模式

public class Program {
    public static void main(String[] args) {
        User user = new User();
        IFactory factory = new AccessFactory();
        IUser iu = factory.createUser();
        iu.insert(user);
        iu.getUser(1);

        Department department = new Department();
        IDepartment iDepartment = factory.createDepartment();
        iDepartment.insert(department);
        iDepartment.getDepartment(1);
    }
}

class User {
    private int id;
    private int name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getName() {
        return name;
    }

    public void setName(int name) {
        this.name = name;
    }
}

interface IUser {
    void insert(User user);
    User getUser(int id);
}

class SqlserverUesr implements IUser {

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

    @Override
    public User getUser(int id) {
        System.out.println("在SQL Server中根据id获取user表一条记录");
        return null;
    }
}

class AccessUesr implements IUser {

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

    @Override
    public User getUser(int id) {
        System.out.println("在Access中根据id获取user表一条记录");
        return null;
    }
}

interface IFactory {
    IUser createUser();

    IDepartment createDepartment();
}

class SqlServerFactory implements IFactory {

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

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

class AccessFactory implements IFactory {

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

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

class Department {
    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;
    }
}

interface IDepartment {
    void insert(Department department);

    Department getDepartment(int id);
}

class SqlServerDepartment implements IDepartment {

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

    @Override
    public Department getDepartment(int id) {
        System.out.println("在SQL Server中根据id获取department表一条记录");
        return null;
    }
}

class AccessDepartment implements IDepartment {

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

    @Override
    public Department getDepartment(int id) {
        System.out.println("在Access中根据id获取department表一条记录");
        return null;
    }
}

二、简单工厂改进抽象工厂模式

public class Program {
    public static void main(String[] args) {
        User user = new User();
        IUser iu = DataAccess.createUser();
        iu.insert(user);
        iu.getUser(1);

        Department department = new Department();
        IDepartment iDepartment = DataAccess.createDepartment();
        iDepartment.insert(department);
        iDepartment.getDepartment(1);
    }
}

class User {
    private int id;
    private int name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getName() {
        return name;
    }

    public void setName(int name) {
        this.name = name;
    }
}

interface IUser {
    void insert(User user);
    User getUser(int id);
}

class SqlserverUesr implements IUser {

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

    @Override
    public User getUser(int id) {
        System.out.println("在SQL Server中根据id获取user表一条记录");
        return null;
    }
}

class AccessUesr implements IUser {

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

    @Override
    public User getUser(int id) {
        System.out.println("在Access中根据id获取user表一条记录");
        return null;
    }
}

class Department {
    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;
    }
}

interface IDepartment {
    void insert(Department department);

    Department getDepartment(int id);
}

class SqlServerDepartment implements IDepartment {

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

    @Override
    public Department getDepartment(int id) {
        System.out.println("在SQL Server中根据id获取department表一条记录");
        return null;
    }
}

class AccessDepartment implements IDepartment {

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

    @Override
    public Department getDepartment(int id) {
        System.out.println("在Access中根据id获取department表一条记录");
        return null;
    }
}

class DataAccess {
//    private static final String db = "Sqlsever";
    private static final String db = "Access";

    public static IUser createUser() {
        IUser result = null;
        switch (db) {
            case "Sqlsever":
                result = new SqlserverUesr();
                break;

            case "Access":
                result = new AccessUesr();
                break;
        }
        return result;
    }

    public static IDepartment createDepartment() {
        IDepartment result = null;
        switch (db) {
            case "Sqlsever":
                result = new SqlServerDepartment();
                break;

            case "Access":
                result = new AccessDepartment();
                break;
        }
        return result;
    }
}