Intercepting filter
Interceptors intercept requests and process them. They help to avoid repetitive handler code such as logging and authorization checks.
In Spring –
A Spring interceptor is a class that either extends the HandlerInterceptorAdapter class or implements the HandlerInterceptor interface.
The HandlerInterceptor contains three main methods:
- prehandle() – called before the execution of the actual handler
- postHandle() – called after the handler is executed
- afterCompletion() – called after the complete request is finished and the view is generated
These three methods provide flexibility to do all kinds of pre- and post-processing.
Techglot 