What is bean reference?

Bean in different XML files If you are referring to a bean in different XML file, you can reference it with a ‘ ref ‘ tag, ‘ bean ‘ attribute. In this example, the bean “OutputHelper” declared in ‘ Spring-Common. xml ‘ can access to other beans in ‘ Spring-Output.

What is bean file in Java?

JavaBeans are classes that encapsulate many objects into a single object (the bean). It is a java class that should follow following conventions: Must implement Serializable. It should have a public no-arg constructor. All properties in java bean must be private with public getters and setter methods.

What is @bean annotation in Spring boot?

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

Why do we need @bean annotation?

What is bean and BeanFactory in Spring?

Beans are java objects that are configured at run-time by Spring IoC Container. BeanFactory represents a basic IoC container which is a parent interface of ApplicationContext. BeanFactory uses Beans and their dependencies metadata to create and configure them at run-time.

What is difference between @bean and Autowired?

@Bean is just for the metadata definition to create the bean(equivalent to tag). @Autowired is to inject the dependancy into a bean(equivalent to ref XML tag/attribute).

What is @component and @bean?

By only introducing the library or the module to the classpath, Spring could automatically scan it and create the necessary object and @Autowrired it. @Component is an annotation that annotates a class. It tells Spring to use this class to create a bean if there is somewhere else depend on this class.

Why beans are used in Java?

Why use JavaBean? According to Java white paper, it is a reusable software component. A bean encapsulates many objects into one object so that we can access this object from multiple places. Moreover, it provides easy maintenance.