How Import work in Hibernate:In the hibernate application if application has two persistent classes with the same name, and then do not want to specify the fully qualified package name in Hibernate queries. Whenever classes can be "imported" explicitly, rather than relying upon auto-import="true". So for this also import classes and interfaces that are not explicitly mapped:
<import class="java.lang.Object" rename="Universe"/>
<import class="ClassName"rename="ShortName" />
Below is the decription of the given above code:
1 class: It is the fully qualified class name of any Java class.
2 rename (optional - defaults to the unqualified class name): This is a name that can be used in the query language