default void doPreProcess(Object bean, Method method, Stopwatch stopwatch) {
        // nothing
    }
Before the method executes.<br>
If you want to prevent the method from executing, throw an exception in the method<br>

@param bean      controller instance
@param method    method
@param stopwatch stopwatch
@see ShenyuException
shenyu-admin/src/main/java/org/apache/shenyu/admin/aspect/controller/ControllerMethodAdvice.java