java.lang.ClassNotFoundException: Could not load requested class: com.mysql.jdbc.Driver

I have a Dynamic Web Project in Eclipse and I have been constantly receiving this error: java.lang.ClassNotFoundException: could not load requested class: com.mysql.jdbc.Driver.

My persistence.xml file:

<persistence-unit name="casos">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <!-- dados da conexao -->
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/cenas" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="yope" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
        </properties>
    </persistence-unit>
</persistence>

Class Cases:

package pkg;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;


@Entity
/**
@NamedQueries({
    @NamedQuery(name="allUsers", query="SELECT u FROM USERS u"),
    @NamedQuery(name="getXUser", query="SELECT u FROM USERS u WHERE u.userName = :username"),
    @NamedQuery(name="getXEmail", query="SELECT u FROM USERS u WHERE u.email = :email")
})
*/
public class Casos implements Serializable {

    private static final long serialVersionUID = 1L;
    @Column(name="nProcesso")
    @Id
    private String nProcesso = null;
    @Column(name = "ano")
    private String ano = null;
    @Column(name = "crime")
    private String crime = null;
    @Column(name = "dataDistribuicao")
    private String dataDistribuicao = null;
    @Column(name = "dataSaida")
    private String dataSaida = null;
    @Column(name = "estado")
    private String estado = null;

    /**
    public Casos(String nProcesso, String ano, String crime, String dataDistribuicao, String dataSaida, String estado) {
        setnProcesso(nProcesso);
        setAno(ano);
        setCrime(crime);
        setDataDistribuicao(dataDistribuicao);
        setDataSaida(dataSaida);
        setEstado(estado);
    }
    */

    public Casos() {
    }

    public String getnProcesso() {
        return nProcesso;
    }

    public void setnProcesso(String nProcesso) {
        this.nProcesso = nProcesso;
    }

    public String getAno() {
        return ano;
    }

    public void setAno(String ano) {
        this.ano = ano;
    }

    public String getCrime() {
        return crime;
    }

    public void setCrime(String crime) {
        this.crime = crime;
    }

    public String getDataDistribuicao() {
        return dataDistribuicao;
    }

    public void setDataDistribuicao(String dataDistribuicao) {
        this.dataDistribuicao = dataDistribuicao;
    }

    public String getDataSaida() {
        return dataSaida;
    }

    public void setDataSaida(String dataSaida) {
        this.dataSaida = dataSaida;
    }

    public String getEstado() {
        return estado;
    }

    public void setEstado(String estado) {
        this.estado = estado;
    };
}

Class CasesController:

package pkg;

import java.util.Set;
import java.util.TreeSet;

import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.context.FacesContext;

@ManagedBean(name = "casoscontroller")
@RequestScoped
public class CasosController {

    FacesContext context = FacesContext.getCurrentInstance();

    private Casos casos;
    private Set<String> anos = new TreeSet<>();
    private Set<String> estados = new TreeSet<>();

    @EJB
    CasosDB casosDB;

    @PostConstruct
    public void init() {
        casos = new Casos();
    }

    public void adicionarCaso(){
        casosDB.inserir(casos);
    }

    public void apagarCaso() {
        casosDB.apagar(casos);
    }

    public void alterarCaso() {
        casosDB.alterar(casos);
    }

    public Casos getCasos() {
        return casos;
    }

    public void setCasos(Casos casos) {
        this.casos = casos;
    }

    public Set<String> getAnos() {
        anos.clear();
        for (int i = 1990; i < 2019; i++) {
            anos.add(Integer.toString(i));
        }
        return anos;
    }

    public Set<String> getEstados() {
        estados.clear();
        estados.add("Saído");
        estados.add("Outro");
        return estados;
    }
}

CaseDB class:

package pkg;

import javax.ejb.Stateless;
import javax.inject.Named;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

@Stateless
@Named(value = "casosdb")
public class CasosDB {

    public void inserir(Casos casos) {
        EntityManagerFactory factory = Persistence.createEntityManagerFactory("casos");
        EntityManager em = factory.createEntityManager();
        EntityTransaction trans = em.getTransaction();
        trans.begin();
        try {
            em.persist(casos);
            em.flush();
            trans.commit();
        } catch (Exception e) {
            System.out.println(e);
            trans.rollback();
        } finally {
            em.close();
        }
    }

    public void alterar(Casos casos) {
        EntityManagerFactory factory = Persistence.createEntityManagerFactory("casos");
        EntityManager em = factory.createEntityManager();
        EntityTransaction trans = em.getTransaction();
        trans.begin();
        try {
            em.merge(casos);
            em.flush();
            trans.commit();
        } catch (Exception e) {
            System.out.println(e);
            trans.rollback();

        } finally {
            em.close();
        }
    }

    public void apagar(Casos casos) {
        EntityManagerFactory factory = Persistence.createEntityManagerFactory("casos");
        EntityManager em = factory.createEntityManager();
        EntityTransaction trans = em.getTransaction();
        trans.begin();
        try {
            em.remove(em.merge(casos));
            em.flush();
            trans.commit();
        } catch (Exception e) {
            System.out.println(e);
            trans.rollback();
        } finally {
            em.close();
        }
    }
}

I have the mysql connector added in build path:

Thefullversionoftheerror:

Thanks in advance!