Merge branch 'master-hutao' into 'master'

优化

See merge request fairylandcloudschool/elearn!4

cloud-util/pom.xml

@@ -159,7 +159,7 @@
             </exclusions>
         </dependency>
         <dependency>
-            <groupId>jdom</groupId>
+            <groupId>org.jdom</groupId>
             <artifactId>jdom</artifactId>
             <version>1.1</version>
         </dependency>