java设计模式：生成器模式实践练习---加深理解

比眉伴天荒 2023-08-17 15:47 158阅读 0赞

题目：某公司要设计一个房屋选购系统，房屋有两种类型：普通型和豪华型。不同房屋体现在面积大小以及卧室、卫生间、车库的数量上。利用生成器模式编制功能类和测试类。

分析：所需要的类有House类，生成器IBuilder接口类，普通房子生成类BuilderImplP,豪华房子生成类BuilderImplS,指挥生产Director类，最后一个测试类Test。

代码如下：

1.House.java

1 package com.Mark.chapter04.生成器.ToUnderstand.chapter04.exercise;
    2 
    3 public class House
    4 {
          
    　　　　//为了更好理解，就简单定义这些属性　　　　
    5     public int area;
    6     public int sleeping;
    7     public int toliet;
    8     public int carNum;
    9 }

2.IBuilder接口

1 package com.Mark.chapter04.生成器.ToUnderstand.chapter04.exercise;
     2 
     3 public interface IBuilder
     4 {    
     5     //因为是接口，所以方法的实现要交给他不同的实现类，实现不同的方法.
     6     public void createArea();
     7     public void createSleeping();
     8     public void createCarNum();
     9     public void createToliet();
    10     public House createHouse();
    11 }

3.建造普通房子BuilderImplP类

1 package com.Mark.chapter04.生成器.ToUnderstand.chapter04.exercise;
     2 
     3 public class BuilderImplP implements IBuilder
     4 {
     5     private House house;
     6     public BuilderImplP(House house)
     7     {
     8         this.house=house;
     9     }
    10     @Override
    11     public void createArea()
    12     {
    13         house.area=1;            //这些属性值并未用到，这里只是起到方便理解作用，就假定认为已经用到了这些属性。
    14         System.out.println("平民房就一平米哦！");
    15     }
    16 
    17     @Override
    18     public void createSleeping()
    19     {
    20         house.sleeping=1;
    21         System.out.println("平民房就一个卧室哦！");
    22     }
    23 
    24     @Override
    25     public void createCarNum()
    26     {
    27         house.carNum=0;
    28         System.out.println("平民房可是没有车库的哦！");
    29     }
    30 
    31     @Override
    32     public void createToliet()
    33     {
    34         house.toliet=1;
    35         System.out.println("平民房就一个厕所！");
    36     }
    37 
    38     @Override
    39     public House createHouse()
    40     {
    41         System.out.println("建造一个平民房！");
    42         createArea();
    43         createCarNum();
    44         createSleeping();
    45         createToliet();
    46         return house;
    47     }
    48 }

4.建造豪华房BuildImplS

1 package com.Mark.chapter04.生成器.ToUnderstand.chapter04.exercise;
     2 
     3 public class BuilderImplS implements IBuilder
     4 {
     5     private House house;
     6     public BuilderImplS(House house)
     7     {
     8         this.house=house;
     9     }
    10     @Override
    11     public void createArea()
    12     {
    13         house.area=100;
    14         System.out.println("土豪房子可是不一样的大100平！");
    15     }
    16 
    17     @Override
    18     public void createSleeping()
    19     {
    20         house.sleeping=5;
    21         System.out.println("土豪房有5张床！");
    22     }
    23 
    24     @Override
    25     public void createCarNum()
    26     {
    27         house.carNum=666;
    28         System.out.println("土豪房子车库数不清！");
    29     }
    30 
    31     @Override
    32     public void createToliet()
    33     {
    34         house.toliet=666;
    35         System.out.println("土豪房子厕所大大的！");
    36     }
    37 
    38     @Override
    39     public House createHouse()
    40     {
    41         System.out.println("土豪房子建好啦！");
    42         createArea();
    43         createCarNum();
    44         createSleeping();
    45         createToliet();
    46         return house;
    47     }
    48 }

5.指挥建造Director

1 package com.Mark.chapter04.生成器.ToUnderstand.chapter04.exercise;
     2 
     3 public class Director
     4 {
     5     private IBuilder iBuilder;
     6     public Director(IBuilder iBuilder)
     7     {
     8         this.iBuilder=iBuilder;
     9     }
    10     public void build()
    11     {
    12         iBuilder.createHouse();
    13     }
    14 
    15 }

6.测试Test

1 package com.Mark.chapter04.生成器.ToUnderstand.chapter04.exercise;
     2 
     3 public class Test
     4 {
     5     public static void main(String[] args)
     6     {
     7         House house = new House();
     8 //        普通房
     9         IBuilder iBuilder1=new BuilderImplP(house);
    10         Director director1=new Director(iBuilder1);
    11         director1.build();
    12 
    13         System.out.println("");
    14 //        土豪房
    15         IBuilder iBuilder2=new BuilderImplS(house);
    16         Director director2=new Director(iBuilder2);
    17         director2.build();
    18 
    19     }
    20 }

输出结果：

建造一个平民房！  
平民房就一平米哦！  
平民房可是没有车库的哦！  
平民房就一个卧室哦！  
平民房就一个厕所！

土豪房子建好啦！  
土豪房子可是不一样的大100平！  
土豪房子车库数不清！  
土豪房有5张床！  
土豪房子厕所大大的！

配合这篇教学可以更加深刻的理解：[生成器模式实例——更通俗易懂的去理解生成器模式][Link 1]

转载于:https://www.cnblogs.com/Mark-blog/p/8598154.html

[Link 1]: http://www.cnblogs.com/Mark-blog/p/8595797.html