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AOP??

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??????????????????AOP??????????????????????????????

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???????????????????????????????????????????????????

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execution([?????] [?????] [????/???] [???]([????]))

• *?????????????????
• ..???????????????
• .??????????

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execution(* com.atguigu.spring.ArithmeticCalculator.*(..))

??ArithmeticCalculator???????????

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????????????@Pointcut???????????????????

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1?IOC???????????

?Spring??AOP???????????IOC????????????????????????

???

//??Calculator beanCalculator calculator = ioc.getBean(Calculator.class);System.out.println(calculator.getClass()); //??????//??Bean????Calculator calculator1 = ioc.getBean("myMathCalculator");System.out.println(calculator1.getClass()); //??????

2??????????????

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• *????????
• ..???????????????

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//??????execution(* com.achang.inter.impl.MyMathCalculator.*(..))

3??????????

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• @Before??????
• @After??????
• @AfterReturning??????
• @AfterThrowing??????

4?JoinPoint???????????

JoinPoint????????????????????

???

@After("execution(public int com.achang.inter.impl.MyMathCalculator.*(int,int))")public static void logEnd(JoinPoint joinPoint) {    String methodName = joinPoint.getSignature().getName();    System.out.println("?" + methodName + "?????????");}

5???throwing?returning????

??throwing?returning???????????????????

???

@AfterThrowing(value = "execution(public int com.achang.inter.impl.MyMathCalculator.*(int,int))", throwing = "e")public static void logException(JoinPoint joinPoint, Exception e) {    String methodName = joinPoint.getSignature().getName();    System.out.println("?" + methodName + "?????????????" + e);}@AfterReturning(value = "execution(public int com.achang.inter.impl.MyMathCalculator.*(int,int))", returning = "result")public static void logReturn(JoinPoint joinPoint, Object result) {    String methodName = joinPoint.getSignature().getName();    System.out.println("?" + methodName + "??????????????" + result);}

6?Spring????????

• ??????????????????????
• ??????????????????Spring???????

7?????

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@Around("OniMyPoint()")public Object myAround(ProceedingJoinPoint pjp) throws Throwable {    Object[] args = pjp.getArgs();    String methodName = pjp.getSignature().getName();        try {        //????        System.out.println("?????????" + methodName + "?????");        //??????        Object proceed = pjp.proceed(args);        //????        System.out.println("?????????" + methodName + "????????????" + proceed + "?");    } catch (Exception e) {        //????        System.out.println("?????????" + methodName + "???????????" + e + "?");        throw new RuntimeException(e);    } finally {        //????        System.out.println("?????????" + methodName + "?????");    }    return proceed;}

8????????

??@Order???????????????????????

???

@Order(1)public class LogUtils {    //...}

??AOP??????????

?????AOP??

???XML??????

??XML??????????

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• XML????????????????
• ?????????XML????????????

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