org.hibernate.MappingException: Unknown entity: annotations.Users

by

The Hibernate configuration file must define the entity classes:

<mapping class="annotations.Users"/>

Or you must explicitly add the class to the configuration using

configuration.addClass(annotations.Users.class)
// Read mappings as a application resourceName
 // addResource is for add hbml.xml files in case of declarative approach
configuration.addResource("myFile.hbm.xml");  // not hibernateAnnotations.cfg.xml

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