4.0.0 org.springframework.boot spring-boot-starter-parent 3.3.1 com.example demo1 0.0.1-SNAPSHOT demo1 demo1 17 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