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The @Required annotation applies to bean property setter methods and it indicates that the affected bean property must be populated in XML configuration file at configuration time. Otherwise, the container throws a BeanInitializationException exception. Following is an example to show the use of @Required annotation.

The @Required annotation in spring is a method-level annotation used in the setter method of a bean property and therefore making the setter-injection compulsory.

If you use @Autowired annotation on a field, that field will be autowired with bean having matching data type. @Required checks if a particular property has been set or not. If a field has been annotated with @Required annotation and that field is not set, you will get org.

We can enable @Required annotation in two ways in Spring XML configuration: Either by registering RequiredAnnotationBeanPostProcessor in the bean definition. Or can be implicitly registered by including the <context:annotation-config/> tag in an XML-based Spring configuration.

@Target : Specifies the type of objects that the annotation can be applied to. @Retention : Specifies whether the annotation metadata can be accessed at runtime by the application (will determine whether the compiled bytecode is affected).

@Component is a class-level annotation. It is used to denote a class as a Component. We can use @Component across the application to mark the beans as Spring's managed components.

The @Required annotation in spring is a method-level annotation used in the setter method of a bean property and therefore making the setter-injection compulsory.

We can enable @Required annotation in two ways in Spring XML configuration: Either by registering RequiredAnnotationBeanPostProcessor in the bean definition. Or can be implicitly registered by including the <context:annotation-config/> tag in an XML-based Spring configuration.

The @Required annotation applies to bean property setter methods and it indicates that the affected bean property must be populated in XML configuration file at configuration time. Otherwise, the container throws a BeanInitializationException exception. Following is an example to show the use of @Required annotation.

The @Required annotation in spring is a method-level annotation used in the setter method of a bean property and therefore making the setter-injection compulsory.

If you use @Autowired annotation on a field, that field will be autowired with bean having matching data type. @Required checks if a particular property has been set or not. If a field has been annotated with @Required annotation and that field is not set, you will get org.

We can enable @Required annotation in two ways in Spring XML configuration: Either by registering RequiredAnnotationBeanPostProcessor in the bean definition. Or can be implicitly registered by including the <context:annotation-config/> tag in an XML-based Spring configuration.

@Target : Specifies the type of objects that the annotation can be applied to. @Retention : Specifies whether the annotation metadata can be accessed at runtime by the application (will determine whether the compiled bytecode is affected).

@Component is a class-level annotation. It is used to denote a class as a Component. We can use @Component across the application to mark the beans as Spring's managed components.

The @Required annotation in spring is a method-level annotation used in the setter method of a bean property and therefore making the setter-injection compulsory.

We can enable @Required annotation in two ways in Spring XML configuration: Either by registering RequiredAnnotationBeanPostProcessor in the bean definition. Or can be implicitly registered by including the <context:annotation-config/> tag in an XML-based Spring configuration.