Spring Boot Tutorials

A quick introduction to Spring Boot with a kickstart Hello World example.

What are Spring Boot starters? Learn how starter dependencies and spring-boot-starter-parent simplify Maven setup, and how starters are named.

Find the dependency versions managed by Spring Boot, add third-party libraries without version tags, and override versions and other defaults such as java.version with Maven properties.

Using Maven 'import' scope to manage Spring Boot dependency versions as an alternative to inheriting from spring-boot-starter-parent.

Using the Spring Boot Maven plugin to run and package a Spring Boot application

Using the Spring Boot Gradle plugin to run and package a Spring Boot application

A short introduction to the @SpringBootApplication annotation and the three annotations it combines

@SpringBootConfiguration Example

Learn how the Spring Boot annotation @EnableAutoConfiguration configures your application automatically, with Maven and Gradle examples.

Learn why @EnableAutoConfiguration does not scan components by itself and how to add @ComponentScan in Spring Boot.

@SpringBootApplication is a shortcut for @SpringBootConfiguration, @EnableAutoConfiguration and @ComponentScan. See how it works and how it changed across Spring Boot versions.

Understand how Spring Boot auto-configuration works, how to see which auto-configurations are applied, and how to disable specific ones.

Learn how Spring Boot 4 splits auto-configuration into small modules, what changed for starters, packages and tests, and how to migrate from Spring Boot 3.

Learn how Spring Boot 4 splits auto-configuration into fine-grained modules. This tutorial uses spring-boot-starter-jackson in a non-web application to demonstrate modular auto-configuration, the auto-configured JsonMapper, and customization via properties and JsonMapperBuilderCustomizer.

Customizing Spring Boot startup: turning off startup logs, changing or removing the banner, using properties and command line arguments, with version differences.

Default locations, overriding default locations and adding custom locations for Static content .

spring.resources.cache-period example.

How to configure boot to serve web components like JSP pages?

How to use a custom favicon in Spring Boot?

How to add and merge additional HttpMessageConverters?

How to use servlet components in a Spring boot application?

Programmatic registration of Servlet components.

Using BeanNameViewResolver in Spring Boot.

Important things to know about Spring Boot WEB MVC auto configuration.

How to do additional MVC configurations in Spring Boot?

Example to register a custom ConfigurableWebBindingInitializer as bean in Boot application.

FreeMarker view example in a Spring Boot application

Groovy view example in a Spring Boot application

Thymeleaf view example in a Spring Boot application

Mustache view example in a Spring Boot application

What is whitelabel page? How to disable it?

How to replace default whitelabel error page with a custom page written in JSP?

How to replace default whitelabel error page with a custom page written in Thymeleaf?

Mapping Status Codes to JSP Pages in Spring Boot

Mapping Status Codes to HTML Pages in Spring Boot

Mapping Status Codes to template engines like FreeMarker Pages.

Implementing a custom ErrorController.

ErrorAttributes example.

Returning error in JSON from ErrorController.

How to map Servlet based custom error handlers/pages with Spring MVC?

How to use JSF with Spring Boot?

How to use Primefaces with SpringBoot?

Analyzing exploded project structure.

Analyzing spring boot executable jar file format.

Analyzing spring boot executable war file format

Analyzing exploded war/jar project structure when running the web application with spring-boot maven plugin.

Using spring-boot-devtools to auto restart application while making new changes.

Another feature of spring-boot-devtools, refreshing browser automatically on changes.

Using a special file to trigger restart.

What files do not trigger restart by default? How to exclude and include files to trigger restart? Tweaking restart delay.

Using Spring Boot dev tools with remote applications.

Examples of ApplicationArguments and @Value annotation to access application argument in Spring boot application.

Getting call backs once SpringApplication started via ApplicationRunner or CommandLineRunner.

Example showing that Spring boot application implicitly registers application shutdown hook.

How to conveniently return a custom exit code in Spring Boot application?

Using @EventListener in Boot application.

Listening to ApplicationEvents event before context initialized.

How to register application listeners in META-INF/spring.factories?

How to use @Value annotation to inject properties in Spring Boot?

Passing Application properties other than application.properties

How to load application.properties from 'current directory'?

How to use Maven resource filtering in Spring Boot application?

How to use Spring Boot ${} placeholder in application.properties

How to use application.yml?

How Spring Boot supports Type-safe Configuration Properties?

@ConfigurationProperties with Nested Objects

How type conversion is applied differently to @ConfigurationProperties and @Value?

How to convert custom property format to the target type when using @ConfigurationProperties?

How to validate configuration fields/properties using JSR-303/349 annotations?

Validating nested @ConfigurationProperties.

RandomValuePropertySource Example.

Passing JSON properties via environment variable or application args or system properties.

Json Properties + @ConfigurationProperties

How to specify the active Profile in Spring Boot?

spring.profiles.include property Example

Setting profiles programmatically in Spring Boot

Loading profile-specific properties in Spring Boot

Understanding the behavior of using spring.profiles.include along with loading of profile specific properties

How to Change configuration depending on the environment in application.yml?

How to use i18n in Spring Boot.

How to override Spring Boot's default LocaleResolver, either with a custom bean or with configuration properties.

Default logging in Spring Boot.

SLF4J + Log4j2 Example.

SLF4J/JUL + Log4j Example.

How to enable Color-coded console output in Spring Boot?

What is LoggingSystem and how it supports logging Environmental properties?

Specifying custom console pattern in application.properties.

logging.file and logging.path example

Based on active profile selecting different configuration in Logback configuration file.

How to use JAX-RS resources in Spring Boot?

What are Actuator Endpoints and how to enable them?

Accessing Actuator JMX MBean Endpoints

Boot + in-memory H2 + JdbcTemplate Example

Enabling H2 Web Console

How to connect to MySql in Spring Boot?

Enabling Security in Spring Boot

Spring Security custom configuration with Spring Boot.

How to configure JDBC authentication in Spring Boot?

How to access H2 web console when Spring Security is enabled?

Form input validation using Bean validation annotation + Thymeleaf View

Performing method validations in Spring boot.

How to perform unit testing with Spring boot application?

@AutoConfigureMockMvc Example

Using embedded server with WebTestClient

TestRestTemplate example

@TestConfiguration Example

@TestConfiguration in a nested class

How to test arguments passed to Spring Boot application?

Mocking spring beans with @MockBean

Creating spy beans with @SpyBean