Question: What Does @Controller Do In Spring?

What is the @controller annotation used for?

The basic purpose of the @Controller annotation is to act as a stereotype for the annotated class, indicating its role.

The dispatcher will scan such annotated classes for mapped methods, detecting @RequestMapping annotations (see the next section)..

What is @controller in Java?

MVC Pattern stands for Model-View-Controller Pattern. This pattern is used to separate application’s concerns. Model – Model represents an object or JAVA POJO carrying data. It can also have logic to update controller if its data changes.

What’s the difference between @component @controller @repository & @service annotations in spring?

The difference between them is, @component is used to annotate compound classes, @Repository is a marker for automatic exception translation in the persistence layer, for service layer we need to use @service. You can refer Spring Documentation to know more.

Is Spring MVC still used?

Yes, Java Spring is still relevant and popular in the development of highly secure, robust, scalable web application. But, with the continuous popularity in the JavaScript from past few years, it will be interesting to see whether the MEAN Stack and other emerging JavaScript framework like Node. JS can beat it or not.

What is the use of @configuration in spring?

Spring @Configuration annotation is part of the spring core framework. Spring Configuration annotation indicates that the class has @Bean definition methods. So Spring container can process the class and generate Spring Beans to be used in the application.

What is the use of @controller in spring?

Spring RestController Spring @RestController is a convenience annotation that is itself annotated with @Controller and @ResponseBody. This annotation is used to mark a class as request handler for RESTful web services.

What is difference between @controller and @RestController in spring?

Difference between @RestController and @Controller in Spring. … The @Controller is a common annotation that is used to mark a class as Spring MVC Controller while @RestController is a special controller used in RESTFul web services and the equivalent of @Controller + @ResponseBody.

What is difference between @component and @bean in spring?

@Component auto detects and configures the beans using classpath scanning whereas @Bean explicitly declares a single bean, rather than letting Spring do it automatically.

What is the difference between @configuration and @component in Spring?

@Component Indicates that an annotated class is a “component”. Such classes are considered as candidates for auto-detection when using annotation-based configuration and classpath scanning. A @Configuration is also a @Component, but a @Component cannot act like a @Configuration.