Which Is Better Annotation Or XML In Spring?

What is @controller annotation in spring?

The @RestController annotation was introduced in Spring 4.0 to simplify the creation of RESTful web services.

It’s a convenience annotation that combines @Controller and @ResponseBody – which eliminates the need to annotate every request handling method of the controller class with the @ResponseBody annotation..

What is Spring IoC?

Spring IoC is the mechanism to achieve loose-coupling between Objects dependencies. To achieve loose coupling and dynamic binding of the objects at runtime, objects dependencies are injected by other assembler objects. … Spring IoC container provides us different ways to decouple the object dependencies.

Where is ApplicationContext XML stored in spring?

I recommend to put it in the src (or src/META-INF ) folder and access it via classpath:applicationContext. xml (or classpath:META-INF/applicationContext. xml ). (Eclipse will copy this file to WebContent/WEB-INF/classes when it build the war archive.)

What is spring Autowiring example?

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.

What is spring bean life cycle?

A “Spring bean” is just a Spring managed instantiation of a Java class. The Spring IoC container is responsible for instantiating, initializing, and wiring beans. The container also manages the life cycle of beans. Spring provides several ways through which you can tap into the bean lifecycle.

How do you handle exceptions in spring?

You can add extra ( @ExceptionHandler ) methods to any controller to specifically handle exceptions thrown by request handling ( @RequestMapping ) methods in the same controller. Such methods can: Handle exceptions without the @ResponseStatus annotation (typically predefined exceptions that you didn’t write)

What is Autowired in spring with example?

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.

What are beans used for in spring?

In Spring, the objects that form the backbone of your application and that are managed by the Spring IoC container are called beans. A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container. Otherwise, a bean is simply one of many objects in your application.

What are annotations in spring?

Spring Annotations allows us to configure dependencies and implement dependency injection through java programs.

Can we use XML configuration in Spring boot?

Before Spring 3.0, XML was the only way to define and configure beans. Spring 3.0 introduced JavaConfig, allowing us to configure beans using Java classes. However, XML configuration files are still used today. In this tutorial, we’ll discuss how to integrate XML configurations into Spring Boot.

What is bean XML in spring?

A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container. These beans are created with the configuration metadata that you supply to the container. For example, in the form of XML definitions which you have already seen in the previous chapters.

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 XML configuration file?

The config. xml file is a persistent store for the managed objects that WebLogic Server creates and modifies during its executing using the BEA implementation of the JMX API. The purpose of config. xml is to store changes to managed objects so that they are available when WebLogic Server is restarted.

What is XML configuration in Spring?

Spring beans definition in xml config You can define all spring beans and their transitive dependencies in single xml file. This xml file can be used to create application context.

How does Autowired work in spring?

Autowiring happens by placing an instance of one bean into the desired field in an instance of another bean. Both classes should be beans, i.e. they should be defined to live in the application context. What is “living” in the application context? This means that the context instantiates the objects, not you.

What is Spring IoC container example?

A Spring IoC container manages one or more beans. These beans are created with the configuration metadata that you supply to the container, for example, in the form of XML definitions.

What is @bean annotation in spring?

Annotating a class with the @Configuration indicates that the class can be used by the Spring IoC container as a source of bean definitions. The @Bean annotation tells Spring that a method annotated with @Bean will return an object that should be registered as a bean in the Spring application context.

What is spring configuration?

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.

Does spring 5 support XML configuration?

Spring MVC: Annotations for controller and XML for bean definitions. Hibernate: JPA Annotations for mapping for model class. Web Application: using web.

Why do we use 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 the use of @component annotation in spring?

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