i'm new in maven and spring now i learned with a tutoriel and i have this errors in the pom.xml .... i guess it's about the dependencies

ArtifactTransferException: Failure to transfer xml-apis:xml-apis:jar:1.0.b2 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 xml-apis:xml-apis:jar:1.0.b2 from/to central (http://repo.maven.apache.org/maven2): No response received after 60000

Missing artifact xml-apis:xml-apis:jar:1.0.b2

ArtifactTransferException: Failure to transfer org.javassist:javassist:jar:3.18.1-GA 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.javassist:javassist:jar:3.18.1-GA from/to central (http://repo.maven.apache.org/maven2): No response received after 60000

Missing artifact org.javassist:javassist:jar:3.18.1-GA

ArtifactTransferException: Failure to transfer org.springframework:spring-orm:jar:4.0.3.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:spring-orm:jar:4.0.3.RELEASE from/to central (http://repo.maven.apache.org/maven2): No response received after 60000

Missing artifact org.springframework:spring-orm:jar:4.0.3.RELEASE