Spring AOP 5种通知与java动态代理

接口，要求为每个方法前后添加日志 

 1 @Component("arithmeticCalculator")
 2 public class ArithmeticCalculatorImpl implements ArithmeticCalculator {
 3 
 4     @Override
 5     public int add(int i, int j) {
 6         int result = i + j;
 7         return result;
 8     }
 9 
10     @Override
11     public int sub(int i, int j) {
12         int result = i - j;
13         return result;
14     }
15 
16     @Override
17     public int mul(int i, int j) {
18         int result = i * j;
19         return result;
20     }
21 
22     @Override
23     public int div(int i, int j) {
24         int result = i / j;
25         return result;
26     }
27 
28 }

接口的实现类