当我使用弹簧工具套件开始我的第一个弹簧应用程序时遇到问题， 这是错误，位于POM.XML：
Project build error: Non-resolvable parent POM: Failure to transfer org.springframework.boot:spring-boot-starter-parent:pom:2.0.2.RELEASE from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.0.2.RELEASE from/to central (http://repo.maven.apache.org/maven2): connection timed out to http://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.0.2.RELEASE/spring-boot-starter-parent-2.0.2.RELEASE.pom and 'parent.relativePath' points at no local POM