设计模式-创建型模式 ？工厂，抽象工厂

1.单例模式

---

临时的理解。
关于工厂模式和抽象工厂模式的差别，主要在于
工厂模式是一个工厂，而抽象工厂把工厂也做成了接口。
2.工厂方法模式

interface IProduct{
    public void productMethod();
}

class Product implements IProduct{
    public void productMethod(){
        System.out.println("产品");
    }
}

interface IFactory{
    public IProduct createProduct();
}

class Factory implements IFactory{
    public IProduct createProduct(){
        return new Product();
    }
}

public class FactoryTest {

    public static void main(String[] args){
        IFactory factory = new Factory();
        IProduct prodect = factory.createProduct();
        prodect.productMethod();
    }
}

3.抽象工厂模式

interface Iproduct1{
    public void show();
}

interface Iproduct2{
    public void show();
}

class product1 implements Iproduct1{

    @Override
    public void show() {
        System.out.println("product 1");
    }
}

class product2 implements Iproduct2{

    @Override
    public void show() {
        System.out.println("product 2");
    }
}

interface AIFactory{
    public Iproduct1 createProduct1();
    public Iproduct2 createProduct2();

}

class AFactory implements AIFactory{
    public Iproduct1 createProduct1(){
        return new product1();
    }

    @Override
    public Iproduct2 createProduct2() {
        return new product2();
    }
}

public class AbstractFactoryTest {
    public static void main(String[] args){
        AIFactory factory =new AFactory();
        factory.createProduct1().show();
        factory.createProduct2().show();
    }
}

4.建造者模式
就是把赋值等操作专门提出来，其实可以理解是本来应该
写在constructor 中的代码被提了出来

class BProduct{
    private String name ;
    private String type;
    public void showProduct(){
        System.out.println("name:"+name);
        System.out.println("type:"+type);
    }
    public void setName(String name){
        this.name =name;
    }
    public void setType(String type){
        this.type=type;
    }

}
abstract class Bui{
   public abstract  void setPart(String name,String type);
    public abstract BProduct getProduct();
}

class ConcreteBuilder extends Bui{

    private BProduct product =new BProduct();
    @Override
    public void setPart(String name, String type) {
        product.setName(name);
        product.setType(type);
    }

    @Override
    public BProduct getProduct() {
        return product;
    }
}


class Director{
    private Bui builder = new ConcreteBuilder();
    public BProduct getAProduct(){
        builder.setPart("car","x7");
        return builder.getProduct();
    }
    public BProduct getBProduct(){
        builder.setPart("carB","Q5");
        return builder.getProduct();
    }
}

public class Builder {

    public static void main(String[] args){
        Director director = new Director();
        BProduct product1 = director.getAProduct();
        BProduct product2 = director.getBProduct();
        product1.showProduct();
        product2.showProduct();
    }
}

5.原型模式
（方便clone）
implements cloneable{
}

创建型模式：
主要是封装了实例化函数。