Quick Answer: What Is The Use Of @Configuration In Spring?

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..

What is the difference between @configuration and @EnableAutoConfiguration?

The main difference between these annotations is that @ComponentScan scans for Spring components while @EnableAutoConfiguration is used for auto-configuring beans present in the classpath in Spring Boot applications.

How do you set up a spring?

There are three ways to define configuration, available in Spring 4 by default:xml-based configuration, when you describe configuration in xml file;java-based configuration, when configuration is Java class, marked with specific annotations;groovy-based configuration, when configuration is file with Groovy code;

What is the use of @repository annotation in spring?

@Repository is a Spring annotation that indicates that the decorated class is a repository. A repository is a mechanism for encapsulating storage, retrieval, and search behavior which emulates a collection of objects.

How many ways can you make a bean in spring?

There are three different ways in which you can define a Spring bean: annotating your class with the stereotype @Component annotation (or its derivatives) writing a bean factory method annotated with the @Bean annotation in a custom Java configuration class. declaring a bean definition in an XML configuration file.

What is @ComponentScan?

The @ComponentScan annotation is used with the @Configuration annotation to tell Spring the packages to scan for annotated components. @ComponentScan also used to specify base packages and base package classes using thebasePackageClasses or basePackages attributes of @ComponentScan.

What is the difference between @component and @ComponentScan?

Using the annotation @ComponentScan , you can tell Spring where do your Spring-managed components lie. … On the other hand, @Component is a generic annotation for any Spring-Managed component. For example – If you create a class called Testing inside the package com. example.

What is @ComponentScan in spring boot?

The @ComponentScan annotation is used to specify packages to locate components in Spring. This is automatically done in the default package, in the case of Spring Boot.

What is use of @configuration?

In computing, configuration files (commonly known simply as config files) are files used to configure the parameters and initial settings for some computer programs. They are used for user applications, server processes and operating system settings.

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

@Component is a class level annotation whereas @Bean is a method level annotation and name of the method serves as the bean name. @Component need not to be used with the @Configuration annotation where as @Bean annotation has to be used within the class which is annotated with @Configuration.

Why @component is used in spring?

Spring Component annotation is used to denote a class as Component. It means that Spring framework will autodetect these classes for dependency injection when annotation-based configuration and classpath scanning is used.

What is the use of @service annotation in spring?

@Controller annotation is an annotation used in Spring MVC framework (the component of Spring Framework used to implement Web Application). The @Controller annotation indicates that a particular class serves the role of a controller.

What is Yaml used for?

Definition. YAML is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used to write configuration files.

What’s a configuration?

In communications or computer systems, a configuration of a system refers to the arrangement of each of its functional units, according to their nature, number and chief characteristics. Often, configuration pertains to the choice of hardware, software, firmware, and documentation.

What is Configurative language?

The formal definition provided is: Configuration languages create files usually read and interpreted only once, during initialization. I also know that one use of a configuration language is to create files that set the initial state of an application – this is a question on the practice exams.

What does @bean do in spring?

The @Bean annotation returns an object that spring registers as a bean in application context. The logic inside the method is responsible for creating the instance. When do we use @Bean annotation? When automatic configuration is not an option.

How do I set up annotations in spring?

Starting from Spring 2.5 it became possible to configure the dependency injection using annotations. So instead of using XML to describe a bean wiring, you can move the bean configuration into the component class itself by using annotations on the relevant class, method, or field declaration.

What is @EnableAutoConfiguration in spring?

Annotation Type EnableAutoConfiguration Enable auto-configuration of the Spring Application Context, attempting to guess and configure beans that you are likely to need. Auto-configuration classes are usually applied based on your classpath and what beans you have defined. For example, if you have tomcat-embedded.