建造者模式

 1 //产品类
 2 class Product{
 3     //产品的内部表象
 4     private String part1;
 5     private String part2;
 6     public String getPart1() {
 7         return part1;
 8     }
 9     public void setPart1(String part1) {
10         this.part1 = part1;
11     }
12     public String getPart2() {
13         return part2;
14     }
15     public void setPart2(String part2) {
16         this.part2 = part2;
17     }
18 }
19 
20 //抽象建造者接口
21 interface Builder{
22     public void buildPart1();
23     public void buildPart2();
24     public Product getProduct();
25 }
26 
27 //具体建造者类
28 class ConcreteBuilder implements Builder{
29 
30     //持有产品实例
31     private Product product = new Product();
32     
33     //构建产品第一部分
34     @Override
35     public void buildPart1() {
36         product.setPart1("");
37     }
38 
39     //构建产品第二部分
40     @Override
41     public void buildPart2() {
42         product.setPart2("");
43     }
44 
45     //获得产品
46     @Override
47     public Product getProduct() {
48         return product;
49     }
50     
51 }
52 
53 //导演者类
54 class Director{
55     private Builder builder;
56     
57     public Director(Builder builder){
58         this.builder = builder;
59     }
60     
61     //产品的构建
62     public void construct(){
63         builder.buildPart1();
64         builder.buildPart2();
65     }
66 }
67 
68 public class MyTest {
69 
70     /**
71      * @param args
72      */
73     public static void main(String[] args) {
74         Builder builder = new ConcreteBuilder();
75         Director director = new Director(builder);
76         director.construct();
77         Product product = builder.getProduct();
78     }
79 
80 }