工厂模式

 1 //抽象产品类
 2 public abstract class Product{
 3     public void method1(){}
 4     public void method2(){}
 5 }
 6 //具体产品类
 7 public class ConcreateProduct1 extends Product{
 8     public void method1(){}
 9 }
10 public class ConcreateProduct2 extends Product{
11     public void method2(){}
12 }
13 //抽象工厂类
14 public abstract class Creator{
15     //创建一个产品对象，其输入参数类型可以自行设置
16     //可以为String，Enum，Class等 也可以为空
17     public abstract <T extends Product> T createProduct(Class<T> c);
18 }
19 //由具体工厂类产生具体的产品对象
20 public class ConcreateCreator extends Creator{
21     public <T extends Product> T createProduct(Class<T> c){
22         Product  product = null;
23         try{
24             product = (Product)Class.forName(c.getName()).newInstance();
25         }catch(Exception e){
26             //异常处理
27         }
28         return (T)product;
29 }
30 //场景调用方法
31 public class Client{
32     public static void main(String[] args){
33         Creator creator = new ConcreateCreactor();
34         Product product = creator.createProduct(ConcreateProduct1 .class);
35     }
36 }