inputText：javax.el.PropertyNotFoundException

Question

我的文本字段有问题。 我有一个我不理解的错误PropertyNotFoundException。 感谢您的帮助。

我的代码：

实体：

@Entity
@Table(name = "RefCollectivite")
public class RefCollectivite implements Serializable {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int idPk;

private String libelle;

public RefCollectivite() {
}

/**
 * @return the idPk
 */
public int getIdPk() {
    return idPk;
}

/**
 * @param idPk the idPk to set
 */
public void setIdPk(int idPk) {
    this.idPk = idPk;
}

/**
 * @return the libelle
 */
public String getLibelle() {
    return libelle;
}

/**
 * @param libelle the libelle to set
 */
public void setLibelle(String libelle) {
    this.libelle = libelle;
}

ManagerBean：

@ViewScoped
@ManagedBean(name = "administrationManagerBean")
public class AdministrationManagerBean implements Serializable {

private RefCollectivite collectiviteCourante; 

pageAdministration.xhtml：

 <h:inputText 
     value="#{administrationManagerBean.collectiviteCourante.libelle}"/>

错误：

javax.el.PropertyNotFoundException：/pageAdministration.xhtml @ 84,155 value =“＃{administrationManagerBean.collectiviteCourante.libelle}”：目标无法访问，“ null”返回null