4.0.0 com.didispace Chapter1-2-1 1.0.0 jar Chapter1-2-1 Spring Boot 2.0 features : Application Events and Listeners org.springframework.boot spring-boot-starter-parent 2.0.0.RELEASE UTF-8 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.projectlombok lombok provided org.springframework.boot spring-boot-maven-plugin