工厂方法模式_工厂方法模式 java_工厂方法模式的好处(4)

是具体工厂必须继承的父类或者必须实现的接口 包含逻辑业务的代码，由应用程序调用以创建对应的具体产品对象 具体工厂类 Conrete Creator 抽象产品接口 Product 具体产品必须继承的父类或必须实现的接口 所创建的对象就是此角色的实例 具体产品类 Concrete Product 练习: 分析图中的关系 抽象工厂角色：Creator 具体工厂角色：BulbCreator与TubeCreator 具体产品角色： BulbLight与TubeLight 抽象产品角色：Light 示 例 1 public intece Fruit void plant ;//种植 void grow ;//生长 void harvest ;//收获 水果产品接口Fruit.java public class Apple implements Fruit private int treeAge; public void plant System.out.println "Apple has been planted." ; public void grow System.out.println "Apple is growing..." ; public void harvest System.out.println "Apple has been harvested." ; public int getTreeAge return treeAge; public void setTreeAge int treeAge this.treeAge treeAge; 具体产品苹果Apple.java public class Grape implements Fruit private boolean seedless;?? //是否有籽 public void plant System.out.println " Grape has been planted." ; public void grow System.out.println " Grape is growing..." ; public void harvest System.out.println " Grape has been harvested." ; public boolean getSeedless return seedless; public void setSeedless boolean seedless this.seedless seedless; public static void log String msg System.out.println msg ; 具体产品葡萄Grape.java public class Strawberry implements Fruit public void plant System.out.println " Strawberry has been planted." ; public void grow System.out.println " Strawberry is growing..." ; public void harvest System.out.println " Strawberry has been harvested." ; public static void log String msg System.out.println msg ; 具体产品草莓Strawberry.java public intece FruitGardener /** * 工厂方法 * * @return 水果 */ public Fruit factory ; 水果工厂接口FruitGardener.java public class AppleGardener implements FruitGardener //工厂方法 public Fruit factory Fruit f new Apple ; System.out.println “水果工厂 （AppletGardener）成功创建一个水果：苹果！" ; return f; 苹果工厂AppleGardener.java public class GrapeGardener implements FruitGardener //工厂方法 public Fruit factory Fruit f new Grape ; System.out.println “水果工厂 （GrapeGardener）成功创建一个水果：葡萄！" ; return f; 葡萄工厂GrapeGardener.java public class StrawberryGardener implements FruitGardener public Fruit factory Fruit f new Strawberry ; System.out.println “水果工厂 （StrawberryGardener）成功创建一个水果：草莓！" ; return f; 草莓工厂StrawberryGardener.java public class TestApp private FruitGardener f1, f2, f3; private Fruit p1, p2, p3; private void test //实例化水果工厂 f1 new AppleGardener ; f2 new GrapeGardener ; f3 new StrawberryGardener ; //从水果工厂生产水果 p1 f1.factory ; p2 f2.factory ; p3 f3.factory ; public static void main String args[] TestApp test new TestApp ; test.test ; 测试类（客户端） TestApp.java 示例2: “快餐店”问题 示例3 移动电信运营商，具有不同的话费套餐形式，如动感地带，神州行，等。

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