Hinbernate inheritance map to 4 table annotation version "not quite understand" (21)

1

Package com.bjsxt.hibernate;

Import javax.persistence.Entity;
Import Javax.persistence.GeneratedValue;
Import Javax.persistence.GenerationType;
Import Javax.persistence.Id;
Import javax.persistence.Inheritance;
Import Javax.persistence.InheritanceType;
Import Javax.persistence.TableGenerator;

@Entity
@Inheritance (strategy=inheritancetype.table_per_class)
@TableGenerator (
		name= "T_gen"),
		table= "T_gen_table",
		pkcolumnname= "T_PK",
		valuecolumnname= "T_value",
		pkcolumnvalue= " PERSON_PK ",
		initialvalue=1,
		allocationsize=1
		) public
class Person {
	private int id;
	private String name;
	
	@Id
	@GeneratedValue (generator= "T_gen", strategy=generationtype.table) public
	int GetId () {return
		Id ;
	}
	public void setId (int id) {
		this.id = ID;
	}
	Public String GetName () {return
		name;
	}
	public void SetName (String name) {
		this.name = name;
	}

}

2

Package com.bjsxt.hibernate;

Import javax.persistence.Entity;

@Entity public
class Student extends person {
	
	private int score;

	public int Getscore () {return
		score;
	}

	public void SetScore (int score) {
		this.score = score;
	}
	
}

3

Package com.bjsxt.hibernate;

Import javax.persistence.Entity;

@Entity public
class Teacher extends person {
	private String title;

	Public String GetTitle () {return
		title;
	}

	public void Settitle (String title) {
		this.title = title;
	}

	
}

4

Package com.bjsxt.hibernate;
Import org.hibernate.Session;
Import Org.hibernate.SessionFactory;
Import org.hibernate.cfg.AnnotationConfiguration;
Import Org.hibernate.tool.hbm2ddl.SchemaExport;
Import Org.junit.AfterClass;
Import Org.junit.BeforeClass;

Import Org.junit.Test;
	
	public class Hibernateormappingtest {private static sessionfactory sessionfactory; @BeforeClass public static void Beforeclass () {New Schemaexport () (New Annotationconfiguration (). Configure ()). Create (FAL
		SE, true);
	Sessionfactory = new Annotationconfiguration (). Configure (). Buildsessionfactory ();
	@AfterClass public static void Afterclass () {sessionfactory.close ();
		@Test public void Testsave () {Student s = new Student ();
		S.setname ("S1");
		S.setscore (80);
		Teacher t = new Teacher ();
		T.setname ("T1");
		
		T.settitle ("intermediate");
		Session session = Sessionfactory.opensession ();
		Session.begintransaction ();
		Session.save (s);
		Session.save (t);
		Session.gettransaction (). commit (); Session.cLose ();
		@Test public void TestLoad () {testsave ();
		Session session = Sessionfactory.opensession ();
		Session.begintransaction ();
		Student s = (Student) session.load (Student.class, 1);
		System.out.println (S.getscore ());
		Person P = (person) session.load (Person.class, 2);
		System.out.println (P.getname ());
		Session.gettransaction (). commit ();
		
	Session.close (); @Test public void Testschemaexport () {New Schemaexport () (New Annotationconfiguration (). Configure ()). Create (False, T
	Rue);
	public static void Main (string[] args) {beforeclass ();
 }
}