Spring Tool Suite 3(STS)를 이용해 Spring 프로젝트를 생성했는데 pom.xml에서 Errors가 발생했습니다. Eclipse하단 Problems를 확인해보니 Errors의 맨 위에 CoreException으로 CoreException: Could not calculate build plan : Plugin org.apache.maven.plugins: maven-compiler-plugin:2.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:2.5.1: ArtifactReso..
