--- title: How SpringBoot AutoConfiguration magic works? | daily.dev description: Spring Boot's AutoConfiguration relies on Spring's @Conditional feature to register beans conditionally based on arbitrary criteria such as classpath presence,... canonical: https://daily.dev/posts/how-springboot-autoconfiguration-magic-works--tbcosm8mp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How SpringBoot AutoConfiguration magic works? | daily.dev og:description: Spring Boot's AutoConfiguration relies on Spring's @Conditional feature to register beans conditionally based on arbitrary criteria such as classpath presence,... og:url: https://daily.dev/posts/how-springboot-autoconfiguration-magic-works--tbcosm8mp og:image: https://api.daily.dev/og/posts/tBCosm8MP.png og:image:alt: How SpringBoot AutoConfiguration magic works? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How SpringBoot AutoConfiguration magic works? **[Test](https://daily.dev/sources/sivalabs-test-123)** · 9 min read · 0 upvotes · 0 comments ## Summary Spring Boot's AutoConfiguration relies on Spring's @Conditional feature to register beans conditionally based on arbitrary criteria such as classpath presence, existing beans, property values, or system properties. The @EnableAutoConfiguration annotation triggers classpath scanning and loads AutoConfiguration classes from spring-boot-autoconfigure.jar. These classes use annotations like @ConditionalOnClass, @ConditionalOnMissingBean, and @ConditionalOnProperty to decide which beans to register. A detailed walkthrough of DataSourceAutoConfiguration illustrates how Spring Boot automatically configures a DataSource based on available classes and application.properties settings, with custom Condition implementations shown step by step. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Testing your auto-configuration against a missing optional dependency](https://daily.dev/posts/testing-your-auto-configuration-against-a-missing-optional-dependency-ohli3thgh) · Wim Deblauwe · 1 upvotes · 2 comments - [Spring Boot Configuration Management Best Practices](https://daily.dev/posts/spring-boot-configuration-management-best-practices-heyuvfjal) · JetBrains · 7 upvotes · 0 comments --- Tags: [#java](https://daily.dev/tags/java), [#spring](https://daily.dev/tags/spring), [#spring-boot](https://daily.dev/tags/spring-boot), [#dependency-injection](https://daily.dev/tags/dependency-injection) [View this post on daily.dev](https://daily.dev/posts/how-springboot-autoconfiguration-magic-works--tbcosm8mp) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How SpringBoot AutoConfiguration magic works?","url":"https://daily.dev/posts/how-springboot-autoconfiguration-magic-works--tbcosm8mp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-springboot-autoconfiguration-magic-works--tbcosm8mp"},"datePublished":"2026-03-15T21:01:23.204Z","dateModified":"2026-03-15T21:03:57.917Z","description":"Spring Boot's AutoConfiguration relies on Spring's @Conditional feature to register beans conditionally based on arbitrary criteria such as classpath presence,...","image":"https://media.daily.dev/image/upload/s--58gMhC4P--/f_auto/v1722860399/public/Placeholder%2012","thumbnailUrl":"https://media.daily.dev/image/upload/s--58gMhC4P--/f_auto/v1722860399/public/Placeholder%2012","isAccessibleForFree":true,"articleSection":"Test","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Test","logo":"https://media.daily.dev/image/upload/s--LrHsyt2T--/f_auto/v1692632054/squad_placeholder_sfwkmj","url":"https://daily.dev/sources/sivalabs-test-123"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-springboot-autoconfiguration-magic-works--tbcosm8mp","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"java,spring,spring-boot,dependency-injection","timeRequired":"PT9M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Test","item":"https://daily.dev/sources/sivalabs-test-123"},{"@type":"ListItem","position":3,"name":"How SpringBoot AutoConfiguration magic works?"}]} ```