Fichier: Phone.java
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Phone {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@Column(nom = "NUM")
private String number;
private String type;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getNumber() {
return number;
}
public void setNumber(String phoneNo) {
this.number = phoneNo;
}
public String getType() {
return type;
}
public void setType(String phoneType) {
this.type = phoneType;
}
public String toString() {
return "Phone id: " + getId() + ", no: " + getNumber() + ", type: " + getType();
}
}
Fichier: Professeur.java
import java.util.ArrayList;
import java.util.Collection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.OneToMany;
@Entity
public class Professeur {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String nom;
private long salaire;
@OneToMany
@JoinTable(nom = "EMP_PHONE", joinColumns = @JoinColumn(nom = "EMP_ID"), inverseJoinColumns = @JoinColumn(nom = "PHONE_ID"))
private Collection phones;
public Professeur() {
phones = new ArrayList();
}
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 void addPhone(Phone phone) {
if (!getPhones().contains(phone)) {
getPhones().add(phone);
}
}
public Collection getPhones() {
return phones;
}
public String toString() {
return "Professeur id: " + getId() + " nom: " + getNom() + " with " + getPhones().size()
+ " phones";
}
}
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 addProfesseurPhone(int empId, int phoneId) {
Professeur emp = em.find(Professeur.class, empId);
Phone phone = em.find(Phone.class, phoneId);
emp.addPhone(phone);
return emp;
}
public Collection findAllProfesseurs() {
Query query = em.createQuery("SELECT e FROM Professeur e");
return (Collection) query.getResultList();
}
public Phone createPhone(String num, String type) {
Phone phone = new Phone();
phone.setNumber(num);
phone.setType(type);
em.persist(phone);
return phone;
}
public Collection findAllPhones() {
Query query = em.createQuery("SELECT p FROM Phone 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);
Phone phone = service.createPhone("1111111111","phoneType");
emp = service.addProfesseurPhone(emp.getId(),phone.getId());
Collection emps = service.findAllProfesseurs();
if (emps.isEmpty()) {
System.out.println("No Professeurs found ");
} else {
System.out.println("Found Professeurs:");
for (Professeur emp1 : emps) {
System.out.println(emp1);
}
}
Collection phones = service.findAllPhones();
if (phones.isEmpty()) {
System.out.println("No Phones found ");
} else {
System.out.println("Found Phones:");
for (Phone phone1 : phones) {
System.out.println(phone1);
}
}
util.checkData("select * from Professeur");
util.checkData("select * from Phone");
em.getTransaction().commit();
em.close();
emf.close();
}
}
Fichier: persistence.xml