Aop提出问题

AOP 前奏

WHY  AOP ？

代码实现片段

package com.learn.spring.aop;

public interface ArithmeticCalculator {
	public  int add(int i, int j );
	public  int sub(int i, int j );
	public  int mul(int i, int j );
	public  int div(int i, int j );
} 

package com.learn.spring.aop;

public class ArithmeticCalculatorImpl implements ArithmeticCalculator {

	@Override
	public int add(int i, int j) {
		int result = i + j ;
		return result;
	}

	@Override
	public int sub(int i, int j) {
		int result = i - j ;
		return result;	
	}

	@Override
	public int mul(int i, int j) {
		int result = i * j ;
		return result;
	}

	@Override
	public int div(int i, int j) {
		int result = i / j ;
		return result;
	}
	
}