SpringBootApplication annotation
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters = { @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
public @interface SpringBootApplication
@Enable autoconfiguration completes auto assembly
@The EnableXxx annotation is generally used to enable a function. It is used to simplify code import, that is, to use this annotation
Solution, some classes will be imported automatically. Therefore, this kind of annotation is a composite annotation, which generally combines one
@Import Annotation, use
The imported classes are generally divided into three types: configuration class, selector, and registrar.
@Target(ElementType.TYPE) @Retention(RetentionPolicy.RUNTIME) @Documented @Inherited @AutoConfigurationPackage @Import(AutoConfigurationImportSelector.class) public @interface EnableAutoConfiguration
The AutoConfigurationImportSelector class implements the lookup of the XXAutoConfiguration class. Core method
protected List<String> getCandidateConfigurations(AnnotationMetadata metadata, AnnotationAttributes attributes) {
/ / find META-INF/spring.factories under the jar package
List<String> configurations = SpringFactoriesLoader.loadFactoryNames(getSpringFactoriesLoaderFactoryClass(),
getBeanClassLoader());
Assert.notEmpty(configurations, "No auto configuration classes found in META-INF/spring.factories. If you "
+ "are using a custom packaging, make sure that file is correct.");
return configurations;
}
spring.factories file
# AutoConfigureCache auto-configuration imports org.springframework.boot.test.autoconfigure.core.AutoConfigureCache=\ org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration # AutoConfigureDataJdbc auto-configuration imports org.springframework.boot.test.autoconfigure.data.jdbc.AutoConfigureDataJdbc=\ org.springframework.boot.autoconfigure.data.jdbc.JdbcRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration # AutoConfigureDataJpa auto-configuration imports org.springframework.boot.test.autoconfigure.orm.jpa.AutoConfigureDataJpa=\ org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\ org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration # AutoConfigureDataLdap auto-configuration imports org.springframework.boot.test.autoconfigure.data.ldap.AutoConfigureDataLdap=\ org.springframework.boot.autoconfigure.data.ldap.LdapRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.ldap.LdapAutoConfiguration,\ org.springframework.boot.autoconfigure.ldap.embedded.EmbeddedLdapAutoConfiguration # AutoConfigureDataMongo auto-configuration imports org.springframework.boot.test.autoconfigure.data.mongo.AutoConfigureDataMongo=\ org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoReactiveDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoReactiveRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration,\ org.springframework.boot.autoconfigure.mongo.MongoReactiveAutoConfiguration,\ org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfiguration # AutoConfigureDataNeo4j auto-configuration imports org.springframework.boot.test.autoconfigure.data.neo4j.AutoConfigureDataNeo4j=\ org.springframework.boot.autoconfigure.data.neo4j.Neo4jDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.neo4j.Neo4jRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration # AutoConfigureDataRedis auto-configuration imports org.springframework.boot.test.autoconfigure.data.redis.AutoConfigureDataRedis=\ org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,\ org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration # AutoConfigureJdbc auto-configuration imports org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureJdbc=\ org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration # AutoConfigureTestDatabase auto-configuration imports org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase=\ org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration # AutoConfigureJooq auto-configuration imports org.springframework.boot.test.autoconfigure.jooq.AutoConfigureJooq=\ org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,\ org.springframework.boot.autoconfigure.jooq.JooqAutoConfiguration,\ org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration # AutoConfigureJson auto-configuration imports org.springframework.boot.test.autoconfigure.json.AutoConfigureJson=\ org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration,\ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,\ org.springframework.boot.autoconfigure.jsonb.JsonbAutoConfiguration # AutoConfigureJsonTesters auto-configuration imports org.springframework.boot.test.autoconfigure.json.AutoConfigureJsonTesters=\ org.springframework.boot.test.autoconfigure.json.JsonTestersAutoConfiguration,\ org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration,\ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,\ org.springframework.boot.autoconfigure.jsonb.JsonbAutoConfiguration # AutoConfigureWebClient auto-configuration imports org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient=\ org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration,\ org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration,\ org.springframework.boot.test.autoconfigure.web.reactive.WebTestClientAutoConfiguration # AutoConfigureWebFlux auto-configuration imports org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebFlux=\ org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.freemarker.FreeMarkerAutoConfiguration,\ org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration,\ org.springframework.boot.autoconfigure.mustache.MustacheAutoConfiguration,\ org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration,\ org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.error.ErrorWebFluxAutoConfiguration # AutoConfigureMockMvc auto-configuration imports org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc=\ org.springframework.boot.test.autoconfigure.web.servlet.MockMvcAutoConfiguration,\ org.springframework.boot.test.autoconfigure.web.servlet.MockMvcSecurityAutoConfiguration,\ org.springframework.boot.test.autoconfigure.web.servlet.MockMvcWebClientAutoConfiguration,\ org.springframework.boot.test.autoconfigure.web.servlet.MockMvcWebDriverAutoConfiguration # AutoConfigureMockRestServiceServer org.springframework.boot.test.autoconfigure.web.client.AutoConfigureMockRestServiceServer=\ org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerAutoConfiguration # AutoConfigureRestDocs auto-configuration imports org.springframework.boot.test.autoconfigure.restdocs.AutoConfigureRestDocs=\ org.springframework.boot.test.autoconfigure.restdocs.RestDocsAutoConfiguration # AutoConfigureTestEntityManager auto-configuration imports org.springframework.boot.test.autoconfigure.orm.jpa.AutoConfigureTestEntityManager=\ org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration # AutoConfigureWebClient auto-configuration imports org.springframework.boot.test.autoconfigure.web.client.AutoConfigureWebClient=\ org.springframework.boot.test.autoconfigure.web.client.WebClientRestTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration,\ org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,\ org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration,\ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,\ org.springframework.boot.autoconfigure.jsonb.JsonbAutoConfiguration,\ org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.function.client.WebClientAutoConfiguration # AutoConfigureWebMvc auto-configuration imports org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureWebMvc=\ org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,\ org.springframework.boot.autoconfigure.freemarker.FreeMarkerAutoConfiguration,\ org.springframework.boot.autoconfigure.groovy.template.GroovyTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration,\ org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration,\ org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,\ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,\ org.springframework.boot.autoconfigure.jsonb.JsonbAutoConfiguration,\ org.springframework.boot.autoconfigure.mustache.MustacheAutoConfiguration,\ org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,\ org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration,\ org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration # DefaultTestExecutionListenersPostProcessors org.springframework.boot.test.context.DefaultTestExecutionListenersPostProcessor=\ org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener$PostProcessor # Spring Test ContextCustomizerFactories org.springframework.test.context.ContextCustomizerFactory=\ org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory,\ org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizerFactory,\ org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizerFactory,\ org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory # Test Execution Listeners org.springframework.test.context.TestExecutionListener=\ org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener,\ org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener,\ org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener,\ org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener
Automatic assembly process of redis
@Configuration
//Only when RedisOperations is found will the configuration be loaded
@ConditionalOnClass(RedisOperations.class)
//Redis related configuration required
@EnableConfigurationProperties(RedisProperties.class)
//Import jedis
@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {
@Bean
/ / when there is no RedisTemplate, a
@ConditionalOnMissingBean(name = "redisTemplate")
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)
throws UnknownHostException {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(redisConnectionFactory);
return template;
}
@Bean
@ConditionalOnMissingBean
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)
throws UnknownHostException {
StringRedisTemplate template = new StringRedisTemplate();
template.setConnectionFactory(redisConnectionFactory);
return template;
}
}
When loading redis, judge whether there are redis related classes in the jvm and whether there are related configurations in the configuration file, so that automatic configuration will take effect and flexible configuration.