设计模式——模板方法

标签：设计模式

类图：

以下程序模拟制作不同饮料的过程。
 
1.定义有咖啡因的饮料抽象类

package net.dp.templatemethod.barista;
 
public abstract class CaffeineBeverage {
   
    final void prepareRecipe() {
        boilWater();
        brew();
        pourInCup();
        addCondiments();
    }
  
    abstract void brew();
   
    abstract void addCondiments();
  
    void boilWater() {
        System.out.println("Boiling water");
    }
   
    void pourInCup() {
        System.out.println("Pouring into cup");
    }
}

package net.dp.templatemethod.barista;
 
public class Tea extends CaffeineBeverage {
    public void brew() {
        System.out.println("Steeping the tea");
    }
    public void addCondiments() {
        System.out.println("Adding Lemon");
    }
}

package net.dp.templatemethod.barista;
 
public class Coffee extends CaffeineBeverage {
    public void brew() {
        System.out.println("Dripping Coffee through filter");
    }
    public void addCondiments() {
        System.out.println("Adding Sugar and Milk");
    }
}

package net.dp.templatemethod.barista;
 
public class BeverageTestDrive {
    public static void main(String[] args) {
  
        Tea tea = new Tea();
        Coffee coffee = new Coffee();
  
        System.out.println("\nMaking tea...");
        tea.prepareRecipe();
  
        System.out.println("\nMaking coffee...");
        coffee.prepareRecipe();
 
    }
}

设计模式——模板方法

标签：设计模式

原文地址：http://blog.csdn.net/liuchangqing123/article/details/43938645