Fichier: ParkingSpace.java
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
public class ParkingSpace {
@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private int lot;
private String location;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getLot() {
return lot;
}
public void setLot(int lot) {
this.lot = lot;
}
public String getLocation() {
return location;
}
public void setLocation(String deptNom) {
this.location = deptNom;
}
public String toString() {
return "ParkingSpace id: " + getId() + " lot: " + getLot() +
", location: " + getLocation();
}
}
Fichier: Professeur.java
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
@Entity
public class Professeur {
@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String nom;
private long salaire;
@OneToOne
@JoinColumn(nom="PSPACE_ID")
private ParkingSpace parkingSpace;
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 long getSalary() {
return salaire;
}
public void setSalary(long salaire) {
this.salaire = salaire;
}
public ParkingSpace getParkingSpace() {
return parkingSpace;
}
public void setParkingSpace(ParkingSpace parkingSpace) {
this.parkingSpace = parkingSpace;
}
public String toString() {
return "Professeur id: " + getId() + " nom: " + getNom() +
" with " + getParkingSpace();
}
}
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 Professeur createProfesseur(String nom, long salaire) {
Professeur emp = new Professeur();
emp.setNom(nom);
emp.setSalary(salaire);
em.persist(emp);
return emp;
}
public Professeur setProfesseurParkingSpace(int empId, int spaceId) {
Professeur emp = em.find(Professeur.class, empId);
ParkingSpace pSpace = em.find(ParkingSpace.class, spaceId);
emp.setParkingSpace(pSpace);
return emp;
}
public Collection findAllProfesseurs() {
Query query = em.createQuery("SELECT e FROM Professeur e");
return (Collection) query.getResultList();
}
public ParkingSpace createParkingSpace(int lot, String location) {
ParkingSpace space = new ParkingSpace();
space.setLot(lot);
space.setLocation(location);
em.persist(space);
return space;
}
public Collection findAllParkingSpaces() {
Query query = em.createQuery("SELECT p FROM ParkingSpace p");
return (Collection) 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 java.util.Collection;
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 = service.createProfesseur("empNom", 100);
ParkingSpace pSpace = service.createParkingSpace(1, "location");
Professeur emp1 = service.setProfesseurParkingSpace(emp.getId(), pSpace.getId());
Collection emps = service.findAllProfesseurs();
if (emps.isEmpty()) {
System.out.println("No Professeurs found ");
} else {
System.out.println("Found Professeurs: ");
for (Professeur emp2 : emps) {
System.out.println(emp2);
}
}
Collection pSpaces = service.findAllParkingSpaces();
if (pSpaces.isEmpty()) {
System.out.println("No ParkingSpaces found ");
} else {
System.out.println("Found ParkingSpaces:");
for (ParkingSpace pSpace1 : pSpaces) {
System.out.println(pSpace1);
}
}
util.checkData("select * from Professeur");
util.checkData("select * from ParkingSpace");
em.getTransaction().commit();
em.close();
emf.close();
}
}
Fichier: persistence.xml