Spring Aop总结

一.切入点Pointcut

二.Advide执行顺序

@Around
@Before
@AfterReturning
@AfterThrowing
@After

    @Pointcut("execution(public * com..*.controller.*.*(..))")
    public void controllerPointcut() {
    }

    @Around("controllerPointcut()")
    private void doAround(ProceedingJoinPoint joinPoint) throws Throwable {
        log.info("====== 1 Around start ======");
        joinPoint.proceed();
        log.info("====== 2 Around end ======");
    }

    @Before("controllerPointcut()")
    private void doBefore(JoinPoint joinPoint) {
        log.info("====== 2 doBefore ======");
    }

    @AfterReturning(value = "controllerPointcut()", returning = "keys")
    public void doAfterReturning(JoinPoint joinPoint, Object keys) {
        log.info("====== 3-1 doAfterReturning{} ======", keys);
    }

    @AfterThrowing(pointcut = "controllerPointcut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Throwable e) {
        log.info("====== 3-2 doAfterThrowing ======");
    }

    @After("controllerPointcut()")
    public void doAfter(JoinPoint joinPoint) {
        log.info("====== 4 doAfter ======");
    }

如果没有@Around：1.先执行@Before，再执行真正的controller方法。2.有异常执行@AfterThrowing，没有异常执行@AfterReturning，@AfterThrowing和@AfterReturning只执行其中一个。3.最后执行@After。
如果有@Around：在Around方法种需要有joinPoint.proceed()，且该行及之前的最先执行。2.执行完joinPoint.proceed()；才进入@Before，流程和没有@Around一致。如果方法执行过程没有异常，执行完@After最后后执行@Around中 joinPoint.proceed() 之后的代码。如果有异常，@Around中 joinPoint.proceed() 之后的方法不再执行。
正常返回结果

====== 1 Around start ======
====== 2 doBefore ======
====== 3-1 doAfterReturningCommonResult(code=-1) ======
====== 4 doAfter ======
====== 2 Around end ======

异常返回结果

====== 1 Around start ======
====== 2 doBefore ======
====== 3-2 doAfterThrowing ======
====== 4 doAfter ======