4.0.0 org.springframework.boot spring-boot-starter-parent 2.7.15 com.example demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot 22 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-webflux org.springframework.boot spring-boot-starter-reactor-netty org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin