Java切面中各个方法对象、参数对象、反射以及注解的分析

说明：
本文以环绕切面配合反射、注解为示例

	@Around(value = "cutMethods() && withAnnotationMethods()")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        long startTime = System.currentTimeMillis();
 
        //通过请求上下文持有者，获取 Servlet 容器对象
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        //通过 Servlet 容器对象获取 request 请求对象
        HttpServletRequest request = attributes.getRequest();
 
        MethodSignature methodSignature = (MethodSignature) point.getSignature();
        Method method = methodSignature.getMethod();
        BusinessLock lockAnnotation = method.getAnnotation(BusinessLock.class);
 
        //获取所有参数的类型和名称
        Parameter[] parameters = method.getParameters();
 
        //获取所有参数的值
        Object[] args = point.getArgs();
 
        //获取全部参数信息数组、以及每个参数的全部注解信息数组
        Annotation[][] para