On this page, we will share all Spring boot and Spring boot testing annotations with their definitions.

All Spring Boot Annotations

@SpringBootConfiguration - @SpringBootApplication annotation indicates a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning. This is a convenience annotation that is equivalent to declaring @Configuration, @EnableAutoConfiguration, and @ComponentScan.

@EnableAutoConfiguration - Enables application context auto-configuration to provide possibly needed beans based on the classpath.
@ConfigurationProperties - Provides external binding of key-value properties.
@ConstructorBinding - Bind properties by using constructors rather than setters.
@ConfigurationPropertiesScan - Enables auto-detection of @ConfigurationProperties classes.
@SpringBootApplication - Combination of @SpringBootConfiguration, @EnableAutoConfiguration, @ConfigurationPropertiesScan, and @ComponentScan
@EntityScan - Configures base packages to scan for entity classes
@EnableJpaRepositories - Enables auto-configuration of JPA repositories
Conditional - Annotated bean is created only if conditions are satisfied

Spring Boot Testing Annotations

@SpringBootTest - Annotated test class will load the entire application context for integration tests.
@WebMvcTest - Annotated test class will load only the web layer (service and data layer are ignored).
@DataJpaTest - Annotated class will load only the JPA components.
@MockBean - Marks annotated field as a mock and loads it as a bean into the application context.