AOP拦截常用请求内容

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1.拦截请求参数

    @Component    @Aspect    public class Ascpect {        private static final Logger log = LogManager.getLogger(Ascpect .class);        @Pointcut("execution(* com.google.lvyou.controller.*.*(..))")        public void aopMethod(){}        @Around("aopMethod()")        public Object bindCacheableAdvice(ProceedingJoinPoint pjp) throws Throwable {            Object[] args = joinPoint.getArgs();            List<String> argList = Arrays.stream(args)                    .map(arg -> {                        return arg + "/更换参数";                    })                    .collect(Collectors.toList());            args = argList.toArray();            return joinPoint.proceed(args) ;        }    }

2.拦截注解

eg：@requestMapping

    @Component    @Aspect    public class Ascpect {        private static final Logger logger = LogManager.getLogger(Ascpect .class);       // @Pointcut("execution(* com.google.lvyou.controller.*.*(..))")       // public void aopMethod(){}        @Around("@annotation(requestMapping)")        public Object bindCacheableAdvice(ProceedingJoinPoint pjp, RequestMapping requestMapping) throws Throwable {            Method method = ((MethodSignature)pjp.getSignature()).getMethod();            log.debug("CacheAroundAdvice invoke start, method=" + method);            Object[] args = pjp.getArgs();            log.debug("CacheAroundAdvice invoke, args=" + Arrays.toString(args));            /**             * 调用proceed没有参数，隐含地将原始参数传递给底层方法。             * 从用户的角度来看proceed()，pjp.proceed(pjp.getArgs())做同样的事情。             * pjp.proceed(new Object[] {...})只有当你想覆盖参数时，你才需要调用。             */            return pjp.proceed();             //return pjp.proceed(pjp.getArgs());        }    }

3.拦截request

    @Component    @Aspect    public class Ascpect {        private static final Logger logger = LogManager.getLogger(Ascpect .class);        /**         * 捕获所有controller层的方法         */        @Pointcut("execution(* com.google.lvyou.controller.*.*(..))")        public void allControllerMethod(){}        @Around("allControllerMethod()")        public Object bindCacheableAdvice(ProceedingJoinPoint pjp) throws Throwable {            HttpServletRequest request =((ServletRequestAttributes)RequestContextHolder.currentRequestAttributes()).getRequest();            String requestUrl = request.getScheme() //当前链接使用的协议                            +"://" + request.getServerName()//服务器地址                            + ":" + request.getServerPort() //端口号                            + request.getContextPath() //应用名称，如果应用名称为                            + request.getServletPath() //请求的相对url -->可作log记录:path(即：requestMapping路径)                            + "?" + request.getQueryString(); //请求参数            return pjp.proceed();         }    }

4.拦截所有异常

即：从进入Controller ——> Service ——> Dao 整个过程中的异常！      有需要抛异常的尽管往上层抛即可，会一并在Controller层最后被AOP捕捉到！

    @Component    @Aspect    public class LvyouExceptionHandler {        private static final Logger logger = LogManager.getLogger(LvyouExceptionHandler .class);        /**         * 捕获所有controller层的方法         */        @Pointcut("execution(* com.google.lvyou.controller.*.*(..))")        public void controller(){}        @Around("controller()")        public Object doBefore(ProceedingJoinPoint pjp) {            try {                return pjp.proceed();             } catch (Throwable throwable) {                logger.error("LvyouExceptionHandler : " , throwable);                if (throwable instanceof LvyouException) {                    return ResultBOBean.ofError(throwable.getMessage());                } else if (throwable instanceof IllegalArgumentException) {                    return ResultBOBean.ofError(throwable.getMessage());                } else if (throwable instanceof NullPointerException) {                    return ResultBOBean.ofError(throwable.getMessage());                } else if (throwable instanceof UnirestException) {                    return ResultBOBean.ofError("连接超时，请稍后重试！");                } else if (throwable instanceof BadSqlGrammarException) {                    return ResultBOBean.ofError("糟糕，出错啦！");                } else if (throwable instanceof RuntimeException) {                    return ResultBOBean.ofError("糟糕，出错啦！");                } else {                    String errorMsg = throwable.toString() == null ? throwable.getMessage() : throwable.toString() ;                    return ResultBOBean.ofError(errorMsg == null || errorMsg.equals("") ? "未知错误" : throwable.toString());                }            }        }    }

基本就这些了，更多的等想到再补吧！

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