How does Spring Spring MVC handle interceptors?

How does Spring Spring MVC handle interceptors?

Spring MVC Handler In order to understand how a Spring interceptor works, let’s take a step back and look at the HandlerMapping. The purpose of HandlerMapping is to map a handler method to a URL. That way, the DispatcherServlet will be able to invoke it when processing a request.

What is handler interceptor in Spring Boot?

Spring Handler Interceptor Simply put, a Spring interceptor is a class that either extends the HandlerInterceptorAdapter class or implements the HandlerInterceptor interface. The HandlerInterceptor contains three main methods: afterCompletion () – called after the complete request is finished and the view is generated

What is the use of prehandle () method in spring interceptor?

As the name implies, the interceptor invokes preHandle () before handling a request. By default, this method returns true to send the request further to the handler method. However, we can tell Spring to stop the execution by returning false. We can use the hook to log information about the request’s parameters, like where the request comes from.

How do interceptors work with handlermapping?

Interceptors working with the HandlerMapping on the framework must implement the HandlerInterceptor interface. This interface contains three main methods: prehandle () – called before the actual handler is executed, but the view is not generated yet postHandle () – called after the handler is executed