在数据库中插入JPA失败

Question

我在尝试将数据插入数据库时遇到问题。我用jpa（persistent）来做这件事。这是我的代码，我在其中调用方法insert

private static ServiceTicketRemote serviceTicket;
......
......
public void insertDevices(ActionEvent acteven) {
    java.sql.Date sqlDate = new java.sql.Date(dateDev.getTime());
    if(modele.equals("")|| serialNumber.equals("") || sqlDate.equals("") || categorie.equals("Select device")) {
        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_ERROR,
                "Champ(s) vide(s)", "");
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }
    else {
        Devices device = new Devices();
        Personnel as = getBeanLogin().getAgentSupport();
        Agentinfo agent = getBeanAgentinfo().getSelectedAgentInfo();
        device.setAgentinfo(agent);
        device.setPersonnel(as);
        device.setCategorie(categorie);
        device.setModele(modele);
        device.setNumeroSerie(serialNumber);
        device.setDateEnvoi(sqlDate);
        try {
                serviceTicket.insertDevices(device);
                FacesContext.getCurrentInstance().addMessage(null, new FacesMessage
                    (FacesMessage.SEVERITY_INFO,"Device added", ""));  
            }
            catch(Exception e) {
                System.out.println("##########ERROR########createPers()########LoginBean#######" + e.getMessage());
                FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_ERROR,"echec de l'ajout : error", e.getMessage());
                    FacesContext.getCurrentInstance().addMessage(null, msg);
            }
        }
}

在我的类serviceTicketRemote中，我有一个方法insertDevices（设备设备），我这样调用它：

@PersistenceContext(unitName = "jpa")
private EntityManager em;
@Override
public Devices insertDevices(Devices device) {
    try {
        em.persist(device); 
    }
    catch (Exception e) {
        System.out.println("##ERROR# insertNewTicketting " + e.getMessage());}
    return device;
}

这是我的实体bean设备：

@Entity
public class Devices implements Serializable {
    private static final long serialVersionUID = 1L;
            @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    @Column(name="id_device")
    private int idDevice;
    //bi-directional many-to-one association to Agentinfo
    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="id_agentinfo")
    private Agentinfo agentinfo; 
    //bi-directional many-to-one association to Personnel
    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="id_per")
    private Personnel personnel;
        @Column(name="categorie")
    private String categorie;
    @Column(name="modele")
    private String modele;
    @Column(name="numero_serie")
    private String numeroSerie;
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="date_envoi")
    private Date dateEnvoi;
    public double getIdDevice() {
    return idDevice;
    }
public void setIdDevice(int idDevice) {
    this.idDevice = idDevice;
}
public Agentinfo getAgentinfo() {
    return agentinfo;
}
public void setAgentinfo(Agentinfo agentinfo) {
    this.agentinfo = agentinfo;
}
public Personnel getPersonnel() {
    return personnel;
}
public void setPersonnel(Personnel personnel) {
    this.personnel = personnel;
}
public String getCategorie() {
    return categorie;
}
public void setCategorie(String categorie) {
    this.categorie = categorie;
}
public String getModele() {
    return modele;
}
public void setModele(String modele) {
    this.modele = modele;
}
public String getNumeroSerie() {
    return numeroSerie;
}
public void setNumeroSerie(String numeroSerie) {
    this.numeroSerie = numeroSerie;
}
public Date getDateEnvoi() {
    return dateEnvoi;
}
public void setDateEnvoi(Date dateEnvoi) {
    this.dateEnvoi = dateEnvoi;
}
}

当我运行我的应用程序时，它显示"设备已添加"，我没有任何错误，一切似乎都很好，但我的数据库中没有任何内容，没有插入。

有人能帮我解决这个问题吗？？？

Answer 1

只是一个猜测：EJB引用不应该声明为静态的。

private static ServiceTicketRemote serviceTicket;

尝试将其更改为：

private ServiceTicketRemote serviceTicket;

看看会发生什么。