Freaks City

Spring MVC’s HandlerInterceptor interface provides a mechanism to intercept HTTP requests at key points in request-processing pipeline, enabling cross-cutting concerns like authentication, logging, or performence monitoring without modifying individual controller logic. Interface Contract The HandlerInterceptor interface defines three methods ...

Exception Handler Implementation Custom Exception Hendler Class Create a custom exception handler by implementing the HandlerExceptionResolver interface: package com.example.exceptions; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequ ...

Creating the Interceptor To implement an interceptor, create a class that implements the HandlerInterceptor interface. This interface defines three callback methods: preHandle, postHandle, and afterCompletion. For authentication purposes, the preHandle method is the primary focus, as it executes before the target controller method is invoked ...