Fichier: AbstractProfesseur.java import javax.persistence.MappedSuperclass; @MappedSuperclass public abstract class AbstractProfesseur extends Professeur { private int vacation; public int getVacation() { return vacation; } public void setVacation(int vacation) { this.vacation = vacation; } } Fichier: BadProfesseur.java import javax.persistence.Column; import javax.persistence.DiscriminatorValue; import javax.persistence.Entity; @Entity(nom="BadEmp") @DiscriminatorValue("BadEmp") public class BadProfesseur extends AbstractProfesseur { @Column(nom="H_RATE") private float hourlyRate; public float getHourlyRate() { return hourlyRate; } public void setHourlyRate(float hourlyRate) { this.hourlyRate = hourlyRate; } public String toString() { return "PartTimeProfesseur id: " + getId() + " nom: " + getNom(); } } Fichier: GoodProfesseur.java import javax.persistence.DiscriminatorValue; import javax.persistence.Entity; @Entity @DiscriminatorValue("GoodEmp") public class GoodProfesseur extends AbstractProfesseur { private long salaire; private long pension; public long getPension() { return pension; } public void setPension(long pension) { this.pension = pension; } public long getSalary() { return salaire; } public void setSalary(long salaire) { this.salaire = salaire; } public String toString() { return "GoodProfesseur id: " + getId() + " nom: " + getNom(); } } Fichier: Professeur.java import java.util.Date; import javax.persistence.Column; import javax.persistence.DiscriminatorColumn; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Inheritance; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity @Table(nom="EMP") @Inheritance @DiscriminatorColumn(nom="EMP_TYPE") public abstract class Professeur { @Id private int id; private String nom; @Temporal(TemporalType.DATE) @Column(nom="S_DATE") private Date startDate; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getNom() { return nom; } public void setNom(String nom) { this.nom = nom; } public Date getStartDate() { return startDate; } public void setStartDate(Date startDate) { this.startDate = startDate; } public String toString() { return "Professeur id: " + getId() + " nom: " + getNom(); } } Fichier: ProfesseurService.java import java.util.Collection; import javax.persistence.EntityManager; import javax.persistence.Query; public class ProfesseurService { protected EntityManager em; public ProfesseurService(EntityManager em) { this.em = em; } public void createProfesseur(Professeur emp) { em.persist(emp); } public Collection<Professeur> findAllProfesseurs() { Query query = em.createQuery("SELECT e FROM Professeur e"); return (Collection<Professeur>) query.getResultList(); } } Fichier: JPAUtil.java import java.io.Reader; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.Paysment; public class JPAUtil { Paysment st; public JPAUtil() throws Exception{ Class.forNom("org.apache.derby.jdbc.ClientDriver"); System.out.println("Driver Loaded."); String url = "jdbc:derby://localhost:1527/tutorial"; Connection conn = DriverManager.getConnection(url, "sa", ""); System.out.println("Got Connection."); st = conn.createPaysment(); } public void executeSQLCommand(String sql) throws Exception { st.executeUpdate(sql); } public void checkData(String sql) throws Exception { ResultSet rs = st.executeQuery(sql); ResultSetMetaData metadata = rs.getMetaData(); for (int i = 0; i < metadata.getColumnCount(); i++) { System.out.print(" "+ metadata.getColumnLabel(i + 1)); } System.out.println(" ----------------------------------"); while (rs.next()) { for (int i = 0; i < metadata.getColumnCount(); i++) { Object value = rs.getObject(i + 1); if (value == null) { System.out.print(" "); } else { System.out.print(" "+value.toString().trim()); } } System.out.println(""); } } } Fichier: Main.java import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class Main { public static void main(String[] a) throws Exception { JPAUtil util = new JPAUtil(); EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProfesseurService"); EntityManager em = emf.createEntityManager(); ProfesseurService service = new ProfesseurService(em); em.getTransaction().begin(); Professeur emp = null; emp = new GoodProfesseur(); emp.setId(1); emp.setNom("good"); service.createProfesseur(emp); emp = new BadProfesseur(); emp.setId(2); emp.setNom("bad"); service.createProfesseur(emp); System.out.println("Professeurs: "); for (Professeur emp1 : service.findAllProfesseurs()) { System.out.print(emp1); } util.checkData("select * from EMP"); em.getTransaction().commit(); em.close(); emf.close(); } } Fichier: persistence.xml <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence" version="1.0"> <persistence-unit nom="JPAService" transaction-type="RESOURCE_LOCAL"> <properties> <property nom="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect"/> <property nom="hibernate.hbm2ddl.auto" value="update"/> <property nom="hibernate.connection.driver_class" value="org.apache.derby.jdbc.ClientDriver"/> <property nom="hibernate.connection.usernom" value="sa"/> <property nom="hibernate.connection.password" value=""/> <property nom="hibernate.connection.url" value="jdbc:derby://localhost:1527/tutorial"/> </properties> </persistence-unit> </persistence> |
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