MappingException (спящий режим)

«Не удалось получить конструктор для org.hibernate.persister.entity.SingleTableEntityPersister»

Я не использую какие-либо maven или подобные инструменты и вручную добавляю и ссылаюсь на библиотеки. Я рассмотрел все подобные вопросы, опубликованные ранее, и включил все соответствующие библиотеки, которые, возможно, потребуется включить. Я использую Java 1.8, Hibernate 5 с тем же уровнем соответствия. Все геттеры и сеттеры также присутствуют и проверены. Невозможно определить причину этого. [ПОЖАЛУЙСТА, НЕ ОТМЕЧАЙТЕ ЭТОТ ДУБЛИКАТ И ДАЙТЕ МНЕ ЗНАТЬ В КОММЕНТАРИЯХ, ЕСЛИ ВЫ СЧИТАЕТЕ, ЧТО Я ПРОПУСТИЛ ЛЮБОЕ ВОЗМОЖНОЕ РЕШЕНИЕ]

Student.java

package com.vv.hibernate.demo.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="student")
public class Student {
 public Student() {
 }
 
 @Id
 @Column(name="id")
 private int id;
 
 @Column(name="first_name")
 private String firstName;
 
 @Column(name="last_name")
 private String lastName;
 
 @Column(name="email")
 private String email;
 public Student(String firstName, String lastName, String email) {
 super();
 this.firstName = firstName;
 this.lastName = lastName;
 this.email = email;
 }
 public int getId() {
 return id;
 }
 public void setId(int id) {
 this.id = id;
 }
 public String getFirstName() {
 return firstName;
 }
 public void setFirstName(String firstName) {
 this.firstName = firstName;
 }
 public String getLastName() {
 return lastName;
 }
 public void setLastName(String lastName) {
 this.lastName = lastName;
 }
 public String getEmail() {
 return email;
 }
 public void setEmail(String email) {
 this.email = email;
 }
 @Override
 public String toString() {
 return "Student [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
 }
 
}

CreateStudentDemo.java(основной файл)

package com.vv.hibernate.demo;
import org.hibernate.MappingException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.Metadata;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import com.vv.hibernate.demo.entity.Student;
public class CreateStudentDemo {
 public static void main(String[] args) throws org.hibernate.MappingException {
 SessionFactory sessionFactory;
 try {
 StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder()
 .configure("hibernate.cfg.xml").build();
 Metadata metaData = new MetadataSources(standardRegistry)
.addAnnotatedClass(Student.class)
//.addAnnotatedClassName( "com.vv.hibernate.demo.entity" )
 .getMetadataBuilder().build();
 sessionFactory = metaData.getSessionFactoryBuilder()
 .build();
 } catch (Exception e) {
 System.out.println("Initial SessionFactory creation failed");
 e.printStackTrace();
 return;
 }
 try(Session session = sessionFactory.openSession()) {
 Student student = new Student("a", "b", "a@b.com");
 session.beginTransaction();
 session.save(student);
 session.getTransaction().commit();
 System.out.println("Transaction completed");
 session.close();
 } 
 catch (MappingException exception) {
 System.out.println("Problem creating session factory");
 exception.printStackTrace();
 } 
 }
}

hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC
 "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
 <session-factory>
 <!-- JDBC Database connection settings -->
 <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
 <property name="connection.url">jdbc:mysql://localhost:3306/hb_student_tracker?useSSL=false&amp;serverTimezone=UTC</property>
 <property name="connection.username">hbstudent</property>
 <property name="connection.password">hbstudent</property>
 <!-- JDBC connection pool settings... using built-in test pool -->
 <property name="connection.pool_size">1</property>
 <!-- Select our SQL dialect -->
 <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
 <!-- Echo the SQL to stdout -->
 <property name="show_sql">true</property>
 <!-- Set the current session context -->
 <property name="current_session_context_class">thread</property>
 
 </session-factory>
</hibernate-configuration>

Ошибки консоли:

 Feb 25, 2021 7:57:30 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.2.17.Final}
Feb 25, 2021 7:57:30 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/C:/eclipseWKSP/hibernate-tutorial/lib/jaxb-impl-2.2.6.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Feb 25, 2021 7:57:31 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
Feb 25, 2021 7:57:31 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Feb 25, 2021 7:57:31 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hb_student_tracker?useSSL=false&serverTimezone=UTC]
Feb 25, 2021 7:57:31 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {password=****, user=hbstudent}
Feb 25, 2021 7:57:31 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
Feb 25, 2021 7:57:31 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 1 (min=1)
Feb 25, 2021 7:57:31 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
Feb 25, 2021 7:57:32 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
INFO: HHH10001008: Cleaning up connection pool [jdbc:mysql://localhost:3306/hb_student_tracker?useSSL=false&serverTimezone=UTC]
Initial SessionFactory creation failed
org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
 at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:123)
 at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:77)
 at org.hibernate.metamodel.internal.MetamodelImpl.initialize(MetamodelImpl.java:129)
 at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:300)
 at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:462)
 at com.vv.hibernate.demo.CreateStudentDemo.main(CreateStudentDemo.java:27)
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
 at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:91)
 at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:116)
 at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:382)
 at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:519)
 at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:124)
 at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
 at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
 at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
 at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:96)
... 5 more
Caused by: java.lang.reflect.InvocationTargetException
 at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
 at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
 at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
 at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:88)
... 15 more
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.reflect.AccessibleObject.setAccessible(boolean)" because "ao" is null
 at javassist.util.proxy.SecurityActions.setAccessible(SecurityActions.java:103)
 at javassist.util.proxy.DefineClassHelper.toClass3(DefineClassHelper.java:151)
 at javassist.util.proxy.DefineClassHelper.toClass2(DefineClassHelper.java:134)
 at javassist.util.proxy.DefineClassHelper.toClass(DefineClassHelper.java:95)
 at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:131)
 at javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:530)
 at javassist.util.proxy.ProxyFactory.createClass2(ProxyFactory.java:515)
 at javassist.util.proxy.ProxyFactory.createClass1(ProxyFactory.java:451)
 at javassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:422)
 at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.postInstantiate(JavassistProxyFactory.java:75)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162)
 at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:156)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:58)
... 21 more

Конфигурация Java Build Path также прилагается:

Решение проблемы

Я все еще не мог найти точный ответ на приведенный выше код, но после повторного изучения учебника, которому я следую, и, к счастью, ошибки исчезли. Буду делиться тем, что сработало. Также я следил за учебником udemy chad, поэтому любой, кто сталкивается с тем же, может ссылаться на это. Будьте очень точны с версиями банок (Чад не включил их в свою версию).

Student.java был таким же, как вопрос

CreateStudentDemo.java (мне пришлось использовать старый код ORM, чтобы заставить это работать)

package com.vv.hibernate.demo;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.vv.hibernate.demo.entity.Student;
public class CreateStudentDemo {
 public static void main(String[] args) {
 // create session factory
 SessionFactory factory = new Configuration().configure("hibernate.cfg.xml").addAnnotatedClass(Student.class)
.buildSessionFactory();
 // create session
 Session session = factory.getCurrentSession();
 try {
 // create a student object
 System.out.println("Creating new student object...");
 Student tempStudent = new Student("Paul", "Doe", "paul@luv2code.com");
 // start a transaction
 session.beginTransaction();
 // save the student object
 System.out.println("Saving the student...");
 session.save(tempStudent);
 // commit transaction
 session.getTransaction().commit();
 System.out.println("Done!");
 } finally {
 factory.close();
 }
 }
}

hibernate.cf.xml также был таким же, как вопрос

Журнал консоли

Feb 26, 2021 12:52:06 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.2.0.Final}
Feb 26, 2021 12:52:06 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Feb 26, 2021 12:52:06 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name: javassist
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/C:/eclipseWKSP/hibernate-tut/lib/jaxb-impl-2.2.6.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Feb 26, 2021 12:52:07 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
Feb 26, 2021 12:52:07 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Feb 26, 2021 12:52:07 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hb_student_tracker?useSSL=false&serverTimezone=UTC]
Feb 26, 2021 12:52:07 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {password=****, user=hbstudent}
Feb 26, 2021 12:52:07 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
Feb 26, 2021 12:52:07 PM org.hibernate.engine.jdbc.connections.internal.PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 1 (min=1)
Feb 26, 2021 12:52:07 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
Creating new student object...
Saving the student...
Hibernate: insert into student (email, first_name, last_name) values (?,?,?)
Done!
Feb 26, 2021 12:52:09 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
INFO: HHH10001008: Cleaning up connection pool [jdbc:mysql://localhost:3306/hb_student_tracker?useSSL=false&serverTimezone=UTC]

ссылочные библиотеки: