-1
時，我想用於此項目表格OneToOne關係：NEWUSER到CreateBill我得到異常： Exception in thread "main" org.hibernate.AnnotationException: Unknown mappedBy in: domain.CreateBill.user, referenced property unknown: domain.NewUser.user未知的mappedBy在OneToOne
，不管了，我是否竊聽「E」或「N」我得到這個例外.. 。
與NEWUSER一流的，主要是獲取/設置
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;
@Entity
@Table(name="Urzytkownik")
public class NewUser {
@Id
@GeneratedValue
private long id;
private String name;
private String surName;
private int pesel; // s08
private int telephoneNumber;
private int pin;
@OneToOne
private CreateBill bill;
public int getPin() {
return pin;
}
public void setPin(int pin) {
this.pin = pin;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSurName() {
return surName;
}
public void setSurName(String surName) {
this.surName = surName;
}
public int getPesel() {
return pesel;
}
public void setPesel(int pesel) {
this.pesel = pesel;
}
public int getTelephoneNumber() {
return telephoneNumber;
}
public void setTelephoneNumber(int telephoneNumber) {
this.telephoneNumber = telephoneNumber;
}
public CreateBill getBill() {
return bill;
}
public void setBill(CreateBill bill) {
this.bill = bill;
} }
第二類CreateBill，主要是獲取/設置和我的最嚴重的問題： @OneToOne（的mappedBy = 「用戶」）：X
package domain;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;
@Entity
@Table(name="Rachunek")
public class CreateBill {
@Id
@GeneratedValue
private int Id;
private int IBAN;
private int money;
@OneToOne(mappedBy="user")
private NewUser user;
public int getId() {
return Id;
}
public void setId(int id) {
Id = id;
}
public int getIBAN() {
return IBAN;
}
public void setIBAN(int iBAN) {
IBAN = iBAN;
}
public int getMoney() {
return money;
}
public void setMoney(int money) {
this.money = money;
}
public NewUser getUser() {
return user;
}
public void setUser(NewUser user) {
this.user = user;
} }
package domain;
import java.util.Scanner;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
public class CreateNewUserBill {
public void CN() {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("manager1");
EntityManager entityManager = entityManagerFactory.createEntityManager();
NewUser user = new NewUser();
CreateBill bill = new CreateBill();
System.out.println("Please enter name: ");
Scanner scannerName = new Scanner(System.in);
String SNa = scannerName.nextLine();
System.out.println("Please enter surname: ");
Scanner scannerSurName = new Scanner(System.in);
String SSN = scannerSurName.nextLine();
System.out.println("Please enter pesel: ");
Scanner scannerPesel = new Scanner(System.in);
int SPe = scannerPesel.nextInt();
System.out.println("Please enter telephone number: ");
Scanner scannerTelephoneNumber = new Scanner(System.in);
int STN = scannerTelephoneNumber.nextInt();
System.out.println("Please enter new PIN: ");
Scanner scannerPIN = new Scanner(System.in);
int SPi = scannerPIN.nextInt();
System.out.println("Please enter IBAN: ");
Scanner scannerIBAN = new Scanner(System.in);
int SIb = scannerIBAN.nextInt();
System.out.println("Please enter Money: ");
Scanner scannerMoney = new Scanner(System.in);
int SMo = scannerMoney.nextInt();
user.setName(SNa);
user.setSurName(SSN);
user.setPesel(SPe);
user.setTelephoneNumber(STN);
user.setPin(SPi);
bill.setIBAN(SIb);
bill.setMoney(SMo);
user.setBill(bill);
entityManager.getTransaction().begin();
entityManager.persist(user);
entityManager.persist(bill);
entityManager.getTransaction().commit();
entityManager.close();
entityManagerFactory.close();
}
}
午餐班。 最重要的是：'N'和'P'。
package domain;
import java.util.Scanner;
public class ATM {
private Scanner scanner;
public void changer() {
int PIN;
char switcher;
System.out.println("Type N to create account");
System.out.println("Type P to enter PIN");
System.out.println("Type E to exit");
System.out.println("Type H to view HELP");
System.out.println();
System.out.println();
scanner = new Scanner(System.in);
switcher = scanner.next().charAt(0);
switch (switcher) {
case 'N':
CreateNewUserBill user = new CreateNewUserBill();
user.CN();
break;
case 'E':
System.out.println("Bye!");
break;
case 'H':
System.out.println("If you have any problem please visit us branch bank.");
break;
case 'P':
System.out.println("Enter PIN");
Scanner odczyt = new Scanner(System.in);
PIN = odczyt.nextInt();
VerificationPIN v = new VerificationPIN();
while (PIN != v.verification()) {
System.out.println("ERROR PIN, write it again");
PIN = odczyt.nextInt();
}
System.out.print("PIN OK");
default:
System.out.println("ERROR 404");
}
}
}
package domain;
public class Main {
public static void main(String[] args) {
ATM atm = new ATM();
atm.changer();
}
}
persistance.xml
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="manager1" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.user" value="atm" />
<property name="javax.persistence.jdbc.password" value="password1" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/mojaBaza" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
<property name="hibernate.hbm2ddl.auto" value="create" />
</properties>
</persistence-unit>
你是否故意拼寫單詞錯誤以避免特殊字符？ – Rumid
你應該真的解釋發生了什麼，這遠離MCVE。請閱讀：https：//stackoverflow.com/help/mcve –