自定義注解+el表達式

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Notification{
    @AliasFor("userId")
    String userId();
    @AliasFor("projectId")
    String projectId();
    TriggerMethodEnum[] code();
}

@Pointcut("@annotation(Notification)")
public void pointcut() {

}

@Around("pointcut()")
public void around(ProceedingJoinPoint point ) throws Throwable {
    String targetName = point.getTarget().getClass().getName();
    String simpleName = point.getTarget().getClass().getSimpleName();
    String methodName = point.getSignature().getName();
    Object[] arguments = point.getArgs();
    Class targetClass = Class.forName(targetName);
    Method[] methods = targetClass.getMethods();
    String projectId = "";
    String userId="";
    String[] paramNames = {};
    for(Method method:methods){
        if(method.getName().equals(methodName)){
            projectId = method.getAnnotation(Notification.class).projectId();
            userId = method.getAnnotation(Notification.class).userId();
            System.out.println("projectId is "+projectId+"userId   is "+userId);

            paramNames = getParamterNames(method);
        }
    }
    ExpressionParser parser = new SpelExpressionParser();
    Expression projectIdExp = parser.parseExpression(projectId);
    Expression userIdExp = parser.parseExpression(userId);
    EvaluationContext context = new StandardEvaluationContext();
    for(int i=0;i<arguments.length;i++){
        context.setVariable(paramNames[i],arguments[i]);
    }
    System.out.println(projectIdExp.getValue(context,String.class));
    System.out.println(userIdExp.getValue(context,String.class));
    point.proceed();
}

自定義注解+el表達式

原文：https://www.cnblogs.com/blindjava/p/14949295.html