4.0.0 org.springframework.boot spring-boot-starter-parent 3.4.1 com.duqing2026 java-demo 0.1.0 java-demo Interview-ready Java demo project 21 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-validation org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin org.apache.maven.plugins maven-surefire-plugin -XX:+EnableDynamicAgentLoading