Interceptors in Spring Boot

Spring Interceptors has the ability to pre-handle and post-handle the web requests. Each interceptor class should extend the HandlerInterceptorAdapter class

How connect interceptor

To add our interceptors into Spring configuration, we need to override addInterceptors() method inside WebConfig class that implements WebMvcConfigurer:

@Configuration
public class AppConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new OurSuperInterceptor());
    }
}

Examples

1. Use predefined interceptor for change language LocaleChangeInterceptor

See /src/main/java/examples/AppConfig.java

2. Create custom interceptor - LoggerInterceptor

see /src/main/java/examples/interceptor/LoggerInterceptor.java