4.0.0 org.springframework.boot spring-boot-starter-parent 4.0.1 com.example demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot 21 org.springframework.boot spring-boot-starter-data-jdbc org.springframework.boot spring-boot-starter-webmvc org.postgresql postgresql runtime org.springframework.boot spring-boot-starter-data-jdbc-test test org.springframework.boot spring-boot-starter-webmvc-test test org.springframework.boot spring-boot-maven-plugin