自己搭建項目的時候由於操作問題（下載jia包時強行關閉 ）導致後期無法導入依賴包：
spring-webmvc jar包：
Failure to transfer org.springframework:spring-webmvc:jar:4.0.6.RELEASE from https://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-webmvc:jar:4.0.6.RELEASE from/to central (https://repo.maven.apache.org/maven2): The operation was cancelled.
解決辦法：
1，刪除maven倉庫中的spring-webmvc jar包文件夾
2，update maven project(重新更新依賴包，並且編譯項目)