[Web Service] Un probleme dans la Methode DELETE dans une RESTful web service avec Spring 3 mvc cvp

Un probleme dans la Methode DELETE dans une RESTful web service avec Spring 3 mvc ...
Jais besoin de resoudre ce probleme :(:(:(

Pièce jointe 170484

on a la Connextion

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	public Connection connexion() throws SQLException{
		String url = "jdbc:mysql://localhost:3306/etud";
		Connection con = DriverManager.getConnection(url,"root","");
		return con;
	}

on a Le CONTROLEUR

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package com.tp.controller;
 
 
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
 
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
 
import com.tp.model.Etudiant;
import com.tp.service.EtudiantService;
 
 
//  @RestController annotation, which marks the class as a controller
@RestController
 
@RequestMapping("etudiants")
@EnableAutoConfiguration
public class EtudiantController {	
 
	@RequestMapping(value = {"/supprimer/{idDeleted}"}, method = RequestMethod.DELETE)
	public void supprimer(@PathVariable("idDeleted") int numEtud ) throws ClassNotFoundException, SQLException {	
 
         Etudiant etudiant = new Etudiant();
		try {
 
 
			Connection con = etudiantService.connexion();
			Statement stSupp = con.createStatement() ;
			stSupp.executeUpdate("DELETE FROM etudiant WHERE id="+etudiant.getId() );
 
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
 
}

ona la classe de resourece ETUDIANT

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package com.tp.model;
 
public class Etudiant {
	// attributes
	int id;
	private String nom;
	private String prenom;
	private String sexe;
	private String mail;
	private String nationalite;
	private String langue;
	private String codePostal;
	private String numTel;
	private String dateNaissance;
	private String Address;
 
	// getter and setter
	public int getId() {
		return id;
	}
 
	public void setId(int id) {
		this.id = id;
	}
 
	//@Column(name="nom",nullable=false,updatable=false)
	public String getNom() {
		return nom;
	}
 
	public void setNom(String nom) {
		this.nom = nom;
	}
 
	public String getPrenom() {
		return prenom;
	}
 
	public void setPrenom(String prenom) {
		this.prenom = prenom;
	}
 
	public String getSexe() {
		return sexe;
	}
 
	public void setSexe(String sexe) {
		this.sexe = sexe;
	}
 
	public String getMail() {
		return mail;
	}
 
	public void setMail(String mail) {
		this.mail = mail;
	}
 
	public String getNationalite() {
		return nationalite;
	}
 
	public void setNationalite(String nationalite) {
		this.nationalite = nationalite;
	}
 
	public String getLangue() {
		return langue;
	}
 
	public void setLangue(String langue) {
		this.langue = langue;
	}
 
	public String getCodePostal() {
		return codePostal;
	}
 
	public void setCodePostal(String codePostal) {
		this.codePostal = codePostal;
	}
 
	public String getNumTel() {
		return numTel;
	}
 
	public void setNumTel(String numTel) {
		this.numTel = numTel;
	}
 
	public String getDateNaissance() {
		return dateNaissance;
	}
 
	public void setDateNaissance(String dateNaissance) {
		this.dateNaissance = dateNaissance;
	}
 
	public String getAddress() {
		return Address;
	}
 
	public void setAddress(String address) {
		Address = address;
	}
 
 
}

et quand je test ... l'operation et valide

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package com.tp.service;
 
import java.sql.SQLException;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
 
 
@Configuration
@ComponentScan(basePackages={"com.tp.controller"})
@EnableAutoConfiguration
public class WebServiceMain {
 
 
	public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, SQLException {
		SpringApplication.run(WebServiceMain.class, args);
 
	}
}

Pièce jointe 170483

Mais le probleme est : Aucun modification a labase de donnee et aucun erreur apparaite !!!!!!!!!

Aidez moi svp
Merci:)