[INFO] Scanning for projects...
[INFO] Downloading from alimaven: http://maven.aliyun.com/nexus/content/groups/public/org/apache/maven/plugins/maven-metadata.xml
[INFO] Downloading from alimaven: http://maven.aliyun.com/nexus/content/groups/public/org/codehaus/mojo/maven-metadata.xml
[INFO] Downloaded from alimaven: http://maven.aliyun.com/nexus/content/groups/public/org/codehaus/mojo/maven-metadata.xml (21 kB at 11 kB/s)
[INFO] Downloaded from alimaven: http://maven.aliyun.com/nexus/content/groups/public/org/apache/maven/plugins/maven-metadata.xml (9.7 kB at 5.0 kB/s)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.846 s
[INFO] Finished at: 2019-07-16T18:16:05+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] No plugin found for prefix 'tomact' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (D:\repository), alimaven (http://maven.aliyun.com/nexus/content/groups/public/)] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoPluginFoundForPrefixException
将你工厂删了，重新下载，如果这个不可以的话就仔细检查你的配置文件和工作环境
将你的本地库删除，仔细检查一下你的远程库地址，和配置文件中的地址，你的配置文件有问题了
一部分jar包已经下载，说明配置没有问题，有时候会用为网络延迟或者网络问题导致maven自动下载包不全然后出错。不知道你用的什么IDE，
可以吧pom里面jar备份后移除，然后重新添加，让maven重新下载jia包。或者直接删除项目，重新导入然后下载也行。
你写的tomact，而不是tomcat,报错信息里都提示了