OWL Files mode (class JenaOWLModel)
OWL Database mode (class OWLDatabaseModel)

不过被跳过去了，没讲怎么操作啊

Method 1   
The simplest way to load an OWL Database project is to load programmatically the project (pprj file), which already contains all database connection information:

Project prj = Project.loadProjectFromFile("/home/pizza_db.pprj",errors);
OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();
...

Method 2
The second method should be used if there is no project file (.pprj) associated with the OWL Database ontology.  

OWLDatabaseKnowledgeBaseFactory factory = new OWLDatabaseKnowledgeBaseFactory();         
Project prj = Project.createNewProject(factory, errors);
OWLDatabaseKnowledgeBaseFactory.setSources(prj.getSources(), "com.mysql.jdbc.Driver", "jdbc:mysql://localhost:3306/protege", "pizza", "user", "password");
prj.createDomainKnowledgeBase(factory, errors, true);

OWLModel owlModel = (OWLModel) prj.getKnowledgeBase();