今天打开eclipse，项目的pom.xml文件无端端报错，本来还好好的，有一个依赖说找不到，但是我的仓库里有该文件
错误提示：
ArtifactTransferException: Failure to transfer com.google.zxing:core:jar:3.2.0 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 com.google.zxing:core:jar:3.2.0 from/to central (http://repo.maven.apache.org/maven2): The operation was cancelled.
把找不到的依赖整个删除掉，然后重新加载，但是jar包下载下来了，pom还是说找不到。
解决方法：
运行maven项目：mvn clean install，然后maven -- > update project