4.0.0 org.springframework.boot spring-boot-starter-parent 2.7.14 com.example demo 0.0.1-SNAPSHOT demo demo 8 org.springframework.boot spring-boot-starter org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin aliyunmaven aliyun https://maven.aliyun.com/repository/public