What Is Required Annotation In Spring?

What is @profile annotation in spring?

Spring 3.1 introduced the annotation @Profile.

Profile annotation is a logical grouping that can be activated programmatically.

It can be used on type-level annotation on any class or it can be used as a meta-annotation for composing custom stereotype annotations or as a method-level annotation on any @Bean method..

What is the use of @bean annotation in spring?

Spring @Bean Annotation is applied on a method to specify that it returns a bean to be managed by Spring context. Spring Bean annotation is usually declared in Configuration classes methods.

What is @ResponseBody annotation in spring?

@ResponseBody is a Spring annotation which binds a method return value to the web response body. It is not interpreted as a view name. It uses HTTP Message converters to convert the return value to HTTP response body, based on the content-type in the request HTTP header.

What is a spring component?

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 @autowired annotation in spring?

The @Autowired annotation provides more fine-grained control over where and how autowiring should be accomplished. The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments.

How does annotation work in spring?

Spring could use its own classloader to load required classes. At runtime, when the class is loaded and Spring determines it has some appropriate annotation, it injects bytecode to add additional properties or behavior to the class.

What is the use of JdbcTemplate in spring?

Spring is a popular Java application framework. JdbcTemplate is a tool for simplifying programming with the JDBC. It takes care of tedious and error-prone low-level details such as handling transactions, cleaning up resources, and correctly handling exceptions. JdbcTemplate is included in Spring’s spring-jdbc module.

What is AnnotationConfigApplicationContext in spring?

AnnotationConfigApplicationContext is a standalone application context which accepts annotated classes as input. For instance, @Configuration or @Component . Beans can be looked up with scan() or registered with register() .

What is use of annotation in spring?

Spring Framework Stereotype Annotations This annotation is used on classes to indicate a Spring component. The @Component annotation marks the Java class as a bean or say component so that the component-scanning mechanism of Spring can add into the application context.

What is @import annotation in spring?

Often it is preferable to use an aggregation approach, where one @Configuration class logically imports the bean definitions defined by another. The @Import annotation provides just this kind of support, and it is the direct equivalent of the element found in Spring beans XML files.

What is use of @configuration in spring?

Spring @Configuration annotation helps in Spring annotation based configuration. @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 spring Autowiring?

Autowiring feature of spring framework enables you to inject the object dependency implicitly. It internally uses setter or constructor injection. Autowiring can’t be used to inject primitive and string values.

Why do you annotate a text?

Why Annotate? By annotating a text, you will ensure that you understand what is happening in a text after you’ve read it. As you annotate, you should note the author’s main points, shifts in the message or perspective of the text, key areas of focus, and your own thoughts as you read.

What is Spring IoC container example?

The Spring container is at the core of the Spring Framework. The container will create the objects, wire them together, configure them, and manage their complete life cycle from creation till destruction. The Spring container uses DI to manage the components that make up an application.

What is @ContextConfiguration in spring?

@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.