10-传递的冲突问题

 <dependency>
	      <groupId>${project.groupId}</groupId>
	      <artifactId>user-log</artifactId>
	      <version>${project.version}</version> 
	         <!--4.排除: 如果在user-servcie中不想使用commons-logging1.1.1就想使用1.0.4 -->
	         <exclusions>
	         	<exclusion>
	         		<groupId>commons-logging</groupId>
	         		<artifactId>commons-logging</artifactId>
	         	</exclusion>
	         </exclusions>
	    </dependency>