WHAT IS INTERCEPTOR? Interceptor is work as a middle object. Interceptor handles the HTTP request before it executes by the controller's method. If you want to perform some task before the controller start executes the HTTP request then we use to the handler adapter and use by dispatcher servlet. Handler Adapter uses handler interceptor to perform the action. Handler interceptor has various methods which are used to perform the action before handling, after handling and after completion . Using interceptor we can perform the operation before request handled by the controller and after the controller send the request to the client. WHAT IS SPRING BOOT INTERCEPTOR? In spring boot to implement interceptor, we must implement the Handler Interceptor interface. Handler Interceptor interface intercepts the client request before the request process in the controller. Handler Interceptor interface has 3 methods ...