顾名思义，装饰模式就是给一个对象增加一些新的功能，而且是动态的，要求装饰对象和被装饰对象实现同一个接口，装饰对象持有被装饰对象的实例。
1. public interface Sourceable {
2. public void method();
3. }
4. ----------------------------------------------------
5. public class Source implements Sourceable {
6. @Override
7. public void method() {
8. System.out.println("the original method!");
9. }
10. }
11. ----------------------------------------------------
12. public class Decorator implements Sourceable {
13. private Sourceable source;
14. public Decorator(Sourceable source) {
15. super();
16. this.source = source;
17. }
18.
19. @Override
20. public void method() {
21. System.out.println("before decorator!");
22. source.method();
23. System.out.println("after decorator!");
24. }
25. }
26. ----------------------------------------------------
27. public class DecoratorTest {
28. public static void main(String[] args) {
29. Sourceable source = new Source();
30. Sourceable obj = new Decorator(source);
31. obj.method();
32. }
33. } |
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