creator：工厂模式 （Factory Pattern）

创建型设计模式，主要用于在程序中代替直接用new 操作生成对象。根据需要生成合适的对象，操作灵活。
工厂模式有几种常见类型：简单工厂模式、抽象工厂模式、工厂方法模式
简单工厂模式:
不直接使用new创建对象。不是严格意义上的设计模式，但是一个好的办法，可以将客户程序从具体的类里面解耦。
工厂方法模式：
使用类的继承。通过覆盖父类的抽象工厂方法来创建自己的产品。通常用来创建一种产品。

抽象工厂模式：
使用接口。通常用来创建产品族或者产品组合。在接口里面统一声明需要创建的方法，返回合适的对象值。

类图：

类图.png

实现：

package Factory;

public class FootedGlassCupProduct extends Product {
    PropertyFactory propertyFactory;
    public FootedGlassCupProduct(PropertyFactory propertyFactory) {
        name="矮脚杯";
        description="用来喝茶吧";
        this.propertyFactory=propertyFactory;
    }

    @Override
    void prepare() {
        properties=this.propertyFactory.initProperty();
    }
}

---

package Factory;

import java.util.HashMap;
import java.util.Map;

public class FootedGlassCupPropertyFactory implements PropertyFactory {
    @Override
    public Map<String, String> initProperty() {
        Map<String,String> footedGlassProperty=new HashMap<String,String>();
        footedGlassProperty.put("material","glass");
        footedGlassProperty.put("height","25");
        footedGlassProperty.put("circle","15");

        return footedGlassProperty;
    }
}

---

package Factory;

public class GlassProductStore extends ProductStore {

    @Override
    public Product orderProduct(String name) {
        Product product;
        product=createProduct(name);
        return product;
    }

    @Override
    public Product createProduct(String name) {
        if("高脚杯".equals(name)){
            return new TallGlassCupProduct(new TallGlassCupPropertyFactory());
        }else if("矮脚杯".equals(name)){
            return new FootedGlassCupProduct(new FootedGlassCupPropertyFactory());
        }
        return null;
    }
}

---

package Factory;

import java.util.Map;

public abstract class Product {
    String name;
    String description;
    Map<String,String> properties;
    void blanking(){
        System.out.println("下料");
        if(properties!=null){
            for(Map.Entry entry:properties.entrySet()){
                System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
            }
        }
        System.out.println("下料完成");
    }

    public  void assemble(){
        System.out.println("成型");
    }

    abstract void prepare();
}

---

package Factory;

public abstract class ProductStore {
    public abstract Product orderProduct(String name);
    public abstract Product createProduct(String name);
}

---

package Factory;

import java.util.Map;

public interface PropertyFactory {
    public Map<String,String> initProperty();
}

---

package Factory;

public class TallGlassCupProduct extends Product {
    PropertyFactory propertyFactory;

    public TallGlassCupProduct(PropertyFactory propertyFactory) {
        name="高脚杯";
        description="用来喝酒吧";
        this.propertyFactory=propertyFactory;
    }

    @Override
    void prepare() {
        properties=this.propertyFactory.initProperty();
    }
}

---

package Factory;

import java.util.HashMap;
import java.util.Map;

public class TallGlassCupPropertyFactory implements PropertyFactory {
    @Override
    public Map<String, String> initProperty() {
        Map<String,String> footedGlassProperty=new HashMap<String,String>();
        footedGlassProperty.put("material","glass");
        footedGlassProperty.put("height","25");
        footedGlassProperty.put("circle","15");

        return footedGlassProperty;
    }
}

---

package Factory;

public  class TestFactory {
    public static void test(){
        WoodProductStore woodProductStore=new WoodProductStore();
        Product product=woodProductStore.orderProduct("木碗");
        product.prepare();
        product.blanking();
        product.assemble();
    }
}

---

package Factory;

public class WoodBowlProduct extends Product {
    PropertyFactory propertyFactory;

    public WoodBowlProduct(PropertyFactory propertyFactory) {
        name="木碗";
        description="保温健康，不易碎";
        this.propertyFactory= propertyFactory;
    }

    @Override
    void prepare() {
        properties=this.propertyFactory.initProperty();

    }
}

---

package Factory;

import java.util.HashMap;
import java.util.Map;

public class WoodBowlPropertyFactory implements PropertyFactory {
    @Override
    public Map<String, String> initProperty() {
        Map<String,String> footedGlassProperty=new HashMap<String,String>();
        footedGlassProperty.put("material","wood");
        footedGlassProperty.put("height","8");
        footedGlassProperty.put("top_circle","20");
        footedGlassProperty.put("bottom_circle","10");
        return footedGlassProperty;
    }
}

---

package Factory;

public class WoodPlateProduct extends Product {
    PropertyFactory propertyFactory;

    public WoodPlateProduct(PropertyFactory propertyFactory) {
        name="木盘";
        description="用来盛放水果不错";
        this.propertyFactory=propertyFactory;
    }

    @Override
    void prepare() {
        properties=this.propertyFactory.initProperty();
    }
}

---

package Factory;

import java.util.HashMap;
import java.util.Map;

public class WoodPlatePropertyFactory implements PropertyFactory {
    @Override
    public Map<String, String> initProperty() {
        Map<String,String> footedGlassProperty=new HashMap<String,String>();
        footedGlassProperty.put("material","wood");
        footedGlassProperty.put("height","4");
        footedGlassProperty.put("top_circle","30");
        footedGlassProperty.put("bottom_circle","20");
        footedGlassProperty.put("flower_decorate","F20");
        return footedGlassProperty;
    }
}

---

package Factory;

public class WoodProductStore extends ProductStore {
    @Override
    public Product orderProduct(String name) {
        Product product;
        product=createProduct(name);
        return product;
    }

    @Override
    public Product createProduct(String name) {
        if("木碗".equals(name)){
            return new WoodBowlProduct(new WoodBowlPropertyFactory());
        }else if("木盘".equals(name)){
            return new WoodPlateProduct(new WoodPlatePropertyFactory());
        }
        return null;
    }
}