1.ArithmeticCalculator.java

package com.huangliusong.spring.aop;public interface ArithmeticCalculator {	int add(int i, int j);	int sub(int i, int j);	int mul(int i, int j);	int div(int i, int j);}

package com.huangliusong.spring.aop;import org.springframework.stereotype.Component;@Component("arithmeticCalculator")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;	}}

package com.huangliusong.spring.aop;import java.util.Arrays;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.AfterThrowing;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.springframework.stereotype.Component;@Aspect@Componentpublic class LoggingAspect {	/**	 * 在 com.huangliusong.spring.aop.	 * ArithmeticCalculator接口的每个实现类的每一个方法开始之前执行一段代码	 */	@Before("execution(public  * com.huangliusong.spring.aop.*.*(..))")	// 加入一个连接点Joinpoint joinPoint可以知道连接细节	public void beforeMethod(JoinPoint joinPoint) {		String methodName = joinPoint.getSignature().getName();		Object[] args = joinPoint.getArgs();		System.out.println("方法开始——————" + methodName + Arrays.asList(args));	}	public void afterMethod(JoinPoint joinPoint) {		String methodName = joinPoint.getSignature().getName();		Object[] args = joinPoint.getArgs();		System.out.println("方法结束——————" + methodName + Arrays.asList(args));	}	/**	 * 在方法正常结束后执行的代码 返回通知是可以访问到方法的返回值	 * 	 * @param joinPoint	 */	@AfterReturning(value = "execution(public  * com.huangliusong.spring.aop.*.*(..))",			returning = "result")	public void afterRunning(JoinPoint joinPoint, Object result) {		String methodName = joinPoint.getSignature().getName();		Object[] args = joinPoint.getArgs();		System.out.println("方法结束——————" + methodName + Arrays.asList(args)				+ result);	}			@AfterThrowing(value = "execution(public  * com.huangliusong.spring.aop.*.*(..))",			throwing="ex")	public void afterThrowing(JoinPoint joinPoint,Exception ex){		String methodName = joinPoint.getSignature().getName();		Object[] args = joinPoint.getArgs();		System.out.println("方法结束——————" + methodName + Arrays.asList(args)				+ ex);			}}

package com.huangliusong.spring.aop;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class TestAop {	@Test	public void test1() {		ApplicationContext ctx = new ClassPathXmlApplicationContext(				"applicationContext.xml");		ArithmeticCalculator arithmeticCalculator = (ArithmeticCalculator) ctx				.getBean("arithmeticCalculator");		System.err.println(arithmeticCalculator.getClass().getName());		int result = arithmeticCalculator.add(11, 11);		System.out.println("结果" + result);		result = arithmeticCalculator.div(12, 0);		System.out.println("结果" + result);	}}

5.applicationContext.xml