public class Father <T>{
	protected Class<T> clazz;
	public Father() {
		clazz = GenericsUtils.getSuperClassGenricType(this.getClass(), 0);
	}
}

@SuppressWarnings("unchecked")
	public static Class getSuperClassGenricType(Class clazz, int index){
		
		System.out.println(Father.class.getGenericSuperclass());
		Type genType = clazz.getGenericSuperclass();// 得到泛型父类
		
		// 如果没有实现ParameterizedType接口，即不支持泛型，直接返回Object.class
		if (!(genType instanceof ParameterizedType)){
			
			return Object.class;
		}
		
		// 返回表示此类型实际类型参数的Type对象的数组,数组里放的都是对应类型的Class, 如BuyerServiceBean extends DaoSupport<Buyer,Contact>就返回Buyer和Contact类型
		Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
		if (index >= params.length || index < 0){
			
			throw new RuntimeException("你输入的索引" + (index < 0 ? "不能小于0" : "超出了参数的总数"));
		}
		if (!(params[index] instanceof Class)){
			
			return Object.class;
		}
		return (Class) params[index];
	}

场景类是

public class Test extends Father<Dog>{
	 public static void main(String[] args)  
	    {  
	        Test t = new Test();  
	    }  
}

先后这样调用

clazz = GenericsUtils.getSuperClassGenricType(this.getClass(), 0);

clazz = GenericsUtils.getSuperClassGenricType(Father.class, 0);

结果发现前者才正确。

所以想问下这里this.getClass和Father.Class有什么不同呢？