What is Spring MVC interceptor?
What is Spring MVC Interceptor? In Web application when request comes to the controller , the HandlerMapping handler matches the incoming request. DispatcherServlet will hand it over to the handler mapping, to let it inspect the request and come up with an appropriate HandlerExecutionChain.
What is a spring handlerinterceptor?
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:
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.
Why J_Spring_Security_check is not invoked for login request?
At the end you will notice (I am not 100% sure) that this interceptor is not invoked for the spring security login request (j_spring_security_check) or logout. Because this is handled in a spring security filter that is applied before any HandlerInterceptor is called.
In this Spring tutorial, we will learn to use spring mvc interceptor in spring mvc applications. This tutorial is very short to focus only on spring interceptor configuration and usage. Interceptors, as we know, are special web programming constructs which gets invoked every time when a certain pre-configured web request is made.
What is spring interceptor XML configuration?
Spring interceptor XML configuration XML configuration helps in adding path patterns on which interceptor will be invoked. Alternatively, we can configure interceptor to be invoked for all web requests. 2.3.2. Spring interceptor Java configuration
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