Я новичок в JPA, я получил ошибку выше при попытке сохранить данные транзакции.
Вот моя сущность:
@Entity
@Table(name = "transaction1")
@NamedQueries({
@NamedQuery(name = "Transaction1.findAll", query = "SELECT t FROM Transaction1 t"),
@NamedQuery(name = "Transaction1.findByTransactionID", query = "SELECT t FROM Transaction1 t WHERE t.transactionID = :transactionID"),
@NamedQuery(name = "Transaction1.findByAmount", query = "SELECT t FROM Transaction1 t WHERE t.amount = :amount"),
@NamedQuery(name = "Transaction1.findByFromAccNo", query = "SELECT t FROM Transaction1 t WHERE t.fromAccNo = :fromAccNo"),
@NamedQuery(name = "Transaction1.findByFromSortCodeNo", query = "SELECT t FROM Transaction1 t WHERE t.fromSortCodeNo = :fromSortCodeNo"),
@NamedQuery(name = "Transaction1.findByName", query = "SELECT t FROM Transaction1 t WHERE t.name = :name"),
@NamedQuery(name = "Transaction1.findByToAccNo", query = "SELECT t FROM Transaction1 t WHERE t.toAccNo = :toAccNo"),
@NamedQuery(name = "Transaction1.findByToSortCodeNo", query = "SELECT t FROM Transaction1 t WHERE t.toSortCodeNo = :toSortCodeNo"),
@NamedQuery(name = "Transaction1.findByTransactionDate", query = "SELECT t FROM Transaction1 t WHERE t.transactionDate = :transactionDate")})
public class Transaction1 implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "Transaction_ID")
private Integer transactionID;
@Basic(optional = false)
@Column(name = "Amount")
private double amount;
@Basic(optional = false)
@Column(name = "From_Acc_No")
private int fromAccNo;
@Basic(optional = false)
@Column(name = "From_Sort_Code_No")
private String fromSortCodeNo;
@Basic(optional = false)
@Column(name = "Name")
private String name;
@Basic(optional = false)
@Column(name = "To_Acc_No")
private int toAccNo;
@Basic(optional = false)
@Column(name = "To_Sort_Code_No")
private String toSortCodeNo;
@Basic(optional = false)
@Column(name = "Transaction_Date")
@Temporal(TemporalType.TIMESTAMP)
private Date transactionDate;
static EntityManagerFactory emf = Persistence.createEntityManagerFactory("SWSXXPU");
public Transaction1() {
}
public Transaction1(Integer transactionID) {
this.transactionID = transactionID;
}
public Transaction1(Integer transactionID, double amount, int fromAccNo, String fromSortCodeNo, String name, int toAccNo, String toSortCodeNo, Date transactionDate) {
this.transactionID = transactionID;
this.amount = amount;
this.fromAccNo = fromAccNo;
this.fromSortCodeNo = fromSortCodeNo;
this.name = name;
this.toAccNo = toAccNo;
this.toSortCodeNo = toSortCodeNo;
this.transactionDate = transactionDate;
}
public Integer getTransactionID() {
return transactionID;
}
public void setTransactionID(Integer transactionID) {
this.transactionID = transactionID;
}
public double getAmount() {
return amount;
}
public void setAmount(double amount) {
this.amount = amount;
}
public int getFromAccNo() {
return fromAccNo;
}
public void setFromAccNo(int fromAccNo) {
this.fromAccNo = fromAccNo;
}
public String getFromSortCodeNo() {
return fromSortCodeNo;
}
public void setFromSortCodeNo(String fromSortCodeNo) {
this.fromSortCodeNo = fromSortCodeNo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getToAccNo() {
return toAccNo;
}
public void setToAccNo(int toAccNo) {
this.toAccNo = toAccNo;
}
public String getToSortCodeNo() {
return toSortCodeNo;
}
public void setToSortCodeNo(String toSortCodeNo) {
this.toSortCodeNo = toSortCodeNo;
}
public Date getTransactionDate() {
return transactionDate;
}
public void setTransactionDate(Date transactionDate) {
this.transactionDate = transactionDate;
}
@Override
public int hashCode() {
int hash = 0;
hash += (transactionID != null ? transactionID.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Transaction1)) {
return false;
}
Transaction1 other = (Transaction1) object;
if ((this.transactionID == null && other.transactionID != null) || (this.transactionID != null && !this.transactionID.equals(other.transactionID))) {
return false;
}
return true;
}
@Override
public String toString() {
return "Entities.Transaction1[transactionID=" + transactionID + "]";
}
Вот мой сервлет:
try{
Transaction1 t = new Transaction1();
t.setFromAccNo(youraccinput);
t.setFromSortCodeNo(yoursortcodeinput);
t.setToAccNo(toaccinput);
t.setToSortCodeNo(destsortcodeinput);
t.setName(recname);
t.setAmount(amtsender);
EntityManager em;
EntityManagerFactory emf;
try {
emf = Persistence.createEntityManagerFactory("SWSXXPU");
em = emf.createEntityManager();
em.getTransaction().begin();
em.persist(t);
em.getTransaction().commit();
request.getRequestDispatcher("ListTransaction").forward(request, response);
}
catch(Throwable e){
out.print(e.getMessage());
out.print(e.getCause());
}
Accounts.debitSourceAccBalance(youraccinput, toaccinput, recname, amtsender);
}
catch(Throwable e){
out.print(e.getMessage());
out.print(e.getCause());
}
Полное сообщение об ошибке:
org.hibernate.PropertyValueException:
свойство not-null ссылается на ноль или
переходное значение:
Entities.Transaction1.transactionDateorg.hibernate.PropertyValueException:
свойство not-null ссылается на ноль или
переходное значение:
Entities.Transaction1.transactionDate
Я отладил его, и мне показалось, что есть свойство value, отличное от null, равно null, которое, как мне кажется, не понимает этого сообщения об ошибке. Я думал, что мне не нужно сохранять транзакцииID, так как он установлен на автоинкремент, а транзакция - на метку времени на текущее обновление. Может кто-нибудь, пожалуйста, пожалуйста, помогите исправить?