Failure to transfer org.apache.maven.surefire:surefire:pom:2.10 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.apache.maven.surefire:surefire:pom:2.10 from/to central
(

http://repo.maven.apache.org/maven2): java.net.ConnectException:
connection timed out to
http://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire/2.10/surefire-2.10.pom

如果出現類似問題，1、檢查maven的本地倉庫：搜尋“*.lastUpdated”檔案，請將該檔案刪除；
2、右鍵點選project -> Maven - Update Dependencies；同時選擇force update可以解決此類問題。