01.AopDemo

1.需要被代理的对象

public interface ICalculator {

int div(int i,int j);

}

@Component(value = "calculatorImpl")

public class CalculatorImpl implements ICalculator {

@Override

public int div(int i, int j) {

System.out.println(i/j);

return i/j;

}

}

2.切面类

@EnableAspectJAutoProxy

@Component

@Aspect

public class AspectTest {

@Pointcut(value = "execution(* com.gaobin.java.aop.ICalculator.div(..))")

public void beforePointcut() {

}

@Before("beforePointcut()")

public void doBeforeCheck(){

System.out.println("Calculator Before");

}

@After("beforePointcut()")

public void doAfterCheck(){

System.out.println("Calculator After");

}

@AfterThrowing("beforePointcut()")

public void doAfterThrowingCheck(){

System.out.println("Calculator AfterThrowing");

}

@AfterReturning("beforePointcut()")

public void doAfterReturningCheck(){

System.out.println("Calculator AfterReturning");

}

}

3.启动

public class App {

public static void main(String[] args) throws InterruptedException {

ApplicationContext ac = new ClassPathXmlApplicationContext("spring-aop.xml");

ICalculator calculator = (ICalculator) ac.getBean("calculatorImpl");

calculator.div(1,0);

}

}