How do you do annotation based configuration in Spring?

How do you do annotation based configuration in Spring?

a. @Required Annotation in Spring

1. Add the Spring Libraries that are required using the Add External JARs options.
2. Create Student. java and MainApp.
3. Write the Beans. xml configuration file under the src folder.
4. Finally, write code for all Java files and Bean config file and run the application as described.

What is context annotation config />?

is used to activate annotations in beans already registered in the application context (no matter if they were defined with XML or by package scanning).

Why do we use @configuration annotation?

@Configuration annotation indicates that a class declares one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime.

What is the difference between @component and @configuration?

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.

What is difference between Java based configuration and annotation based configuration?

They are similar, but have subtle differences. Instead of having an @Component annotation on your class( which is annotation-based configuration ), you can skip the @Component and instead have a @Bean annotated method which returns a new instance of this class. ( this is Java-based configuration).

What is context configuration?

@ContextConfiguration defines class-level metadata that is used to determine how to load and configure an ApplicationContext for integration tests.

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

@Configuration Indicates that a class declares one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime. @Component Indicates that an annotated class is a “component”.

What is the difference between @component and configuration?

Can we use @component instead of @configuration?

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.

Why do we use @configuration in Spring?

One of the most important annotations in spring is @Configuration annotation which 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. This annotation is part of the spring core framework.

What is Spring context configuration?

@ContextConfiguration loads an ApplicationContext for Spring integration test. @ContextConfiguration can load ApplicationContext using XML resource or the JavaConfig annotated with @Configuration . The @ContextConfiguration annotation can also load a component annotated with @Component , @Service , @Repository etc.

Where is Spring configuration file?

You will need to add spring. xml file at the location – src/main/resources folder. You can have your directory structure inside this directory as – src/main/resources/com/vipin/dao. src/main/java directory is preferred for java classes.

What is @configuration @EnableAutoConfiguration and ComponentScan?

Can we use @component and @configuration together?

Can I replace @service with @component?

@Repository @Service and @Controller are serves as specialization of @Component for more specific use on that basis you can replace @Service to @Component but in this case you loose the specialization.