Jar file download problem Jar包下载问题

[justinliu1981]

I met the network problem that I was not able to download all tsf jars and tencent/cloud jars at once. When I retried it, mvn could not reload the jars from remote repository. I fixed it by the following steps:

1. Remove all the xxx.lastUpdated files and rerun command 'mvn clean package' ( or use -U with mvn command, it can ignore xxx.lastUpdated).
2. Switch to another stable network.
   我遇到网络抖动问题，导致TSF所依赖的两个主要jar文件库tsf和tencent/cloud无法一次下载完所有的jar文件。当我重试时，mvn会因为xxx.lastUpdated文件认为本地已经有该jar包而不再去远端库下载。我通过以下两个步骤解决了这个问题：
3. 删除所有xxx.lastUpadated文件，或者在mvn命令后跟随-U参数，这个参数会忽略掉xxx.lastUpdated文件。
4. 切换另一个稳定网络，再次执行mvn clean package命令，重新下载所有jar包。