常用设计模式之简单工厂（使用反射）

 1 interface Product{
 2     void doSth(String name);
 3 }
 4 class Factory{
 5     private Factory(){}
 6     //public static Product newInstance(Class<? extends Product> cls)
 7     public static Product newInstance(String className)
 8     {
 9         Product product = null;
10         try{
11             //product =  cls.getConstructor().newInstance();
12             product = (Product)Class.forName(className).newInstance();
13         }catch (Exception e){
14             e.printStackTrace();
15         }
16         return product;
17     }
18 }
19 class ProductX implements Product{
20     //public ProductX(){}
21     public void doSth(String name){
22         System.out.println("-----ProductX -------" + name);
23     }
24 }
25 class ProductY implements Product{
26     //public ProductY(){}
27     public void doSth(String name){
28         System.out.println("-----ProductY -------" + name);
29     }
30 }
31 public class DesignPatternsTest{
32     public static void main(String[] args) throws Exception{
33         //Product p1 = Factory.newInstance(ProductX.class);
34         Product p1 = Factory.newInstance("com.wrb.designpatterns.ProductX");
35         //ProductY p2 = (ProductY)Factory.newInstance(ProductY.class);
36         ProductY p2 = (ProductY)Factory.newInstance("com.wrb.designpatterns.ProductY");
37         p1.doSth("p1");
38         p2.doSth("p2");
39     }
40 }