设计模式二—工厂方法模式
一、工厂方法模式优点
良好的封装性
优秀的可扩展性
屏蔽产品类
典型的解耦架构
二、实例
三、实例代码
1、Fruit.java
public interface Fruit {
/*
* 生长
* 收获
* 栽种
*/
public void grow();
public void harvest();
public void plant();
}
2、FruitGardener.java
public interface FruitGardener {
/*
* 水果园丁
* 建立水果工厂的方法
*/
public Fruit factory();
}
3、Apple.java
public class Apple implements Fruit {
private int treeAge;
public void grow() {
System.out.println("苹果正在生长，，，");
}
public void harvest() {
System.out.println("收获苹果");
}
public void plant() {
System.out.println("栽种苹果");
}
public int getTreeAge() {
return treeAge;
}
public void setTreeAge(int treeAge) {
this.treeAge = treeAge;
}
}
4、Grape.java
public class Grape implements Fruit {
private boolean seedless;
public void grow() {
System.out.println("葡萄正在生长。。。");
}
public void harvest() {
System.out.println("收获葡萄。");
}
public void plant() {
System.out.println("栽种葡萄。");
}
public boolean isSeedless() {
return seedless;
}
public void setSeedless(boolean seedless) {
this.seedless = seedless;
}
}
5、AppleGardener.java
public class AppleGardener implements FruitGardener {
public Fruit factory() {
return new Apple();
}
}
6、GrapeGardener.java
public class GrapeGardener implements FruitGardener {
public Fruit factory() {
return new Grape();
}
}
7、ClientDemo.java
public class ClientDemo {
public static void main(String[] args) {
//苹果园丁工厂
FruitGardener fruitGardener=new AppleGardener();
//通过工厂生产苹果
Fruit apple = fruitGardener.factory();//用接口代替了实现实例
apple.plant();
apple.grow();
apple.harvest();
//葡萄园丁工厂
fruitGardener=new AppleGardener();
//通过工厂生产葡萄
Fruit grape = fruitGardener.factory();//用接口代替了实现实例
grape.plant();
grape.grow();
grape.harvest();
}
}
四、实例结果
栽种苹果
苹果正在生长，，，
收获苹果
栽种苹果
苹果正在生长，，，
收获苹果