4.0.0 org.springframework.boot spring-boot-starter-parent 2.1.2.RELEASE com.javadevjournal spring-boot-custom-message-source 0.0.1-SNAPSHOT spring-boot-custom-message-source Custom Validation MessageSource in Spring Boot 1.8 org.springframework.boot spring-boot-starter-thymeleaf org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin