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  • Java建造者模式

    Meal:

    public class Meal {
        private String food;
        private String drink;
    
        public void setFood(String food){
            this.food = food;
        }
        public String getFood(){
            return food;
        }
    
        public void setDrink(String drink){
            this.drink = drink;
        }
        public String getDrink(){
            return drink;
        }
    }
    

    MealBuilder:

    public abstract class MealBuilder {
        private Meal meal = new Meal();
        public abstract void buildFood();
        public abstract void buildDrink();
        public Meal getMeal(){
            return meal;
        }
    }
    

    SubMealBuilderA:

    public class SubMealBuilderA extends MealBuilder {
        @Override
        public void buildFood() {
            System.out.println("This is SubMealBuilderA food!");
        }
    
        @Override
        public void buildDrink() {
            System.out.println("This is SubMealBuilderA Drink!");
        }
    }
    

    SubMealBuilderB:

    public class SubMealBuilderB extends MealBuilder{
        @Override
        public void buildFood() {
            System.out.println("This is SubMealBuilderB food!");
        }
    
        @Override
        public void buildDrink() {
            System.out.println("This is SubMealBuilderB drink!");
        }
    }
    

    KFCWaiter:

    public class KFCWaiter {
        private MealBuilder mb = null;
    
        public KFCWaiter(){
    
        }
    
        public KFCWaiter(MealBuilder mb){
            this.mb = mb;
        }
    
        public void setMealBuilder(MealBuilder mb){
            this.mb = mb;
        }
    
        public Meal construct(){
            mb.buildDrink();
            mb.buildFood();
            return mb.getMeal();
        }
    }
    

    BuilderMethod(调用):

    public class BuilderMethod{
        public static void main(String[] args){
            MealBuilder mb_1 = new SubMealBuilderA();
            MealBuilder mb_2 = new SubMealBuilderB();
    
            KFCWaiter kfc = null;
    
            kfc = new KFCWaiter(mb_1);
            kfc.construct();
    
            kfc = new KFCWaiter(mb_2);
            kfc.construct();
        }
    }
    

    Result:

    This is SubMealBuilderA Drink!
    This is SubMealBuilderA food!
    This is SubMealBuilderB drink!
    This is SubMealBuilderB food!

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  • 原文地址:https://www.cnblogs.com/softwarecrash/p/8647360.html
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