Spring calls these methods when a new instance of the return type is required. marks a factory method which instantiates a Spring bean. is a method-level annotation and a direct analog of the XML element. The 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. is used on classes to indicate a Spring component. We can use this annotation with a constructor, setter, or field injection. is used to mark a dependency which Spring is going to resolve and inject automatically. If specific packages are not defined, scanning will occur from the package of the class that declares this annotation. is also used to specify base packages using basePackageClasses or basePackage attributes to scan. is used with the annotation to allow Spring to know the packages to scan for annotated components. A Java class annotated with is a configuration by itself and will have methods to instantiate and configure the dependencies. is an analog for an XML configuration file – it is configured using Java classes. Spring Core Annotations is used on classes that define beans. Let’s look at all the annotations provided by the Spring Framework. With Spring Boot, we can do almost everything with annotations. Spring Framework started out with XML configuration and over time it has introduced many capabilities to reduce code verbose and get things done quickly. Nowadays, there are so many spring annotations that it could become overwhelming. Spring-Boot-All-Annotations All Spring Annotations Explained Cheat Sheet
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