线程中的异常 "main" java.lang.ExceptionInInitializerError 和 ： 无法使受保护的最终 java.lang.Class java.lang.ClassLoa

Question

我无法解决这些问题，也无法运行这个休眠程序也有任何帮助。我写过两个hibernate程序，错误都是一样的。所以我发布了我的注释hibernate程序…

java模块。Base不"打开java.lang";致未命名模块@7fc2413d

异常堆栈

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.ExceptionInInitializerError
at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:167)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @7fc2413d
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)

Customer.java

@Entity
@Table(name="customers")
public class Customer {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="cid")
private int cid;//P.K
@Column(name="cname")
private String cname;
@Column(name="email")
private String email;
@Column(name="phone")
private long phone;
@Column(name="city")
private String city;
@Column(name="bal")
private double bal;

// constructor
// getter setter
}

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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>
<property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/jtcindiadb</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">Pr3000</property>
<property name="hibernate.connection.pool_size">99</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<mapping class="com.jtcindia.hibernate.Customer"></mapping>
</session-factory>
</hibernate-configuration>

HibernateUtil.java

package com.jtcindia.hibernate;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

public class HibernateUtil {
static SessionFactory factory;
static {
AnnotationConfiguration cfg=new AnnotationConfiguration();
cfg=(AnnotationConfiguration)cfg.configure("hibernate.cfg.xml");
factory=cfg.buildSessionFactory();
}
public static SessionFactory setSessionFactory(){
return factory;
}

}

Client1.java

package com.jtcindia.hibernate; 
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

public class Client1 {
public static void main(String[] args) {
Transaction tx=null;
try {
SessionFactory sf=HibernateUtil.setSessionFactory();
Session session=sf.openSession();
tx=session.beginTransaction();
Customer cust=new Customer("som","som@jtc",123,"Noida",25000.00);
session.save(cust);
tx.commit();
session.close();
System.out.println("record inserted");
}catch(Exception e) {
e.printStackTrace();
if(tx!=null)tx.rollback();
}
}

}

Answer 1

您不应该在尚未测试过的新Java版本上使用旧版本的Hibernate。更新Hibernate版本或使用旧的Java版本。