Spring Boot Tutorials

Spring Boot makes it quick and easy to create a Spring based applications.

*Spring Boot 4 minimum supported versions:

• Spring Framework 7.0.7
• Java 17 (up to Java 26)
• Jakarta EE 11 (jakarta.*)
• Maven 3.6.3 or later
• Gradle 7.6.4 or later, and 8.x

Spring Boot 4 supports the following embedded servlet containers:

• Tomcat 11.0, Servlet 6.1
• Jetty 12.1, Servlet 6.1
• Any Servlet 6.1+ compatible container and JPA 3.2 specifications.

P.S This series of articles are based on Spring Boot 4.0.6 GA

Read more on the Spring Boot system requirements and Spring Boot 4 migration guide.

Section 1 — Getting Started

• Spring Boot hello world example
• Spring Boot @Controller vs @RestController Example

Spring Boot logging examples using the Logback (default logging) and Log4j2.

• Spring Boot Logback SLF4j Example , change to logging examples

Section 2 — Request Mapping

Spring Boot @GetMapping and @PostMapping Example
Spring Boot @PutMapping Example
Spring Boot @DeleteMapping Example

Spring Boot @RequestMapping Example

Section 3 — Reading Input

Spring Boot @PathVariable vs @RequestParam Example
Spring Boot @RequestBody Example
Spring Boot @RequestHeader Example
Spring Boot @CookieValue Example
@ModelAttribute

Section 4 — Sending Things Back

Spring Boot Return JSON Example
Spring Boot ResponseEntity Example
Spring Boot HTTP Status Code Example
Spring Boot @ResponseStatus Example

Section 5 — Web Pages (Thymeleaf)

Spring Boot Thymeleaf Example
Spring Boot Thymeleaf Pass Data to View (Model) Example
Spring Boot Thymeleaf if and each (Loop) Example
Spring Boot Thymeleaf Form Submit Example
Spring Boot Static Resources (CSS, JS, Images) Example

Section 6 — Validation

Spring Boot Form Validation Example
Spring Boot @Valid and @NotBlank Example
Spring Boot BindingResult Validation Example
Spring Boot Show Validation Error Messages (Thymeleaf) Example

Section 7 — Error Handling

Spring Boot @ExceptionHandler Example
Spring Boot @ControllerAdvice Global Exception Handling Example
Spring Boot Custom Error Page Example
Spring Boot Custom Exception (404 Not Found) Example

— JPA Switch Article —

Spring Data

Spring Boot Spring Data JPA + H2 Database Example

Section 8 — REST API + Spring Boot 4 Features

Spring Boot REST API CRUD Example
Spring Boot REST API with JPA Example
Spring Boot API Versioning Example (Spring Boot 4 — new feature, version in title is fair)
Spring Boot HTTP Service Client Example (Spring Boot 4 — new feature, version in title is fair)

Section 9 — Extras

Spring Boot Read application.properties Example
Spring Boot @CrossOrigin (CORS) Example
Spring Boot File Upload Example
Spring Boot File Download Example
Spring Boot HandlerInterceptor Example

Section 10 — Testing

Spring Boot @WebMvcTest Example
Spring Boot MockMvc Example

File upload example
File download example

Old Articles, need upgrade…

2. Spring Boot Loogging

Spring Boot logging examples using the Logback (default logging) and Log4j2.

• Spring Boot Logback SLF4j Example
• Log4j2

2. Externalized Configuration

Spring Boot default loads application.properties and application.yaml files from the classpath root src/main/resources into the Spring application environment.

• Spring @PropertySource example
• Spring Boot @ConfigurationProperties example
• Accessing values from application.properties in Spring Boot
• Spring @Value default value

3. Spring Boot Testing

• Testing JSON in Spring Boot
• Spring @TestPropertySource example
• Spring Boot Testcontainers example

4. Spring Data (Working with database)

4.1 Spring Data JPA

Spring Data JPA examples.

• Spring data JPA
• Testing Spring Data JPA with @DataJpaTest
• Spring Boot + Spring Data JPA + PostgreSQL
• Spring Boot + Spring Data JPA + MySQL
• Spring Data JPA Paging and Sorting example

4.2 Spring Data JDBC

Spring JDBC JdbcTemplate examples.

• Spring Boot JDBC Examples
• Spring Boot JDBC Stored Procedure Examples
• Spring JdbcTemplate Querying Examples
• Spring JdbcTemplate Handle Large ResultSet
• Spring JdbcTemplate batchUpdate() Example
• Spring Boot JDBC Image BLOB Examples

5. Spring Boot How-to

• How to change the default port in Spring Boot
• How to load custom properties files in Spring Boot
• Spring Boot @ConditionalOnProperty example
• Spring Boot @DynamicPropertySource example
• Spring Boot @ServiceConnection example
• Spring Boot CommandLineRunner Example
• How to Run a CommandLineRunner Bean Conditionally in Spring Boot

Errors

• package javax.persistence does not exist
• package javax.validation.constraints does not exist

Download Source Code

References

• Spring Boot Reference Guide
• [Spring Initializer – bootstrap your application now] (https://start.spring.io/)
• Spring Guides