正确的仓库依赖是  

<dependency>
<groupId>com.dameng</groupId>
<artifactId>jdbc8</artifactId>
<version>1.8</version>
</dependency>
文档上 <repository>
<id>dc</id>
<name>dc Repository</name>
<url>http://119.96.92.173:8181/repository/maven-releases/</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>

仓库地址和demo上依赖地址也不一样