实例化一个休眠配置会引发错误:线程“ main”中的异常java.lang.NoClassDefFoundError:javax / xml / bind / JAXBException

时间:2018-08-16 14:22:13

标签: java mysql spring hibernate jaxb

我对休眠框架还很陌生,并且正在使用Udemy课程创建一个简单的应用程序。我一直在下面的堆栈上得到一个“ java.lang.NoClassDefFoundError”。似乎当我创建org.hibernate.cfg.Configuration对象时,会引发异常。关于如何解决以下问题的任何指导都将受到赞赏,此休眠版本是否有故障,是否需要回溯到以前的版本?

休眠核心版本:5.3.0.Final

Hibernate注释:3.5.6.Final

My-SQL Server版本:8.0.12

DEBUG - Logging Provider: org.jboss.logging.Log4jLoggerProvider
DEBUG - Adding Integrator [org.hibernate.cfg.beanvalidation.BeanValidationIntegrator].
DEBUG - Adding Integrator [org.hibernate.secure.spi.JaccIntegrator].
DEBUG - Adding Integrator [org.hibernate.cache.internal.CollectionCacheInvalidator].
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
    at org.hibernate.boot.spi.XmlMappingBinderAccess.<init>(XmlMappingBinderAccess.java:43)
    at org.hibernate.boot.MetadataSources.<init>(MetadataSources.java:86)
    at org.hibernate.cfg.Configuration.<init>(Configuration.java:123)
    at org.hibernate.cfg.Configuration.<init>(Configuration.java:118)
    at com.dataPack.data.HibernateUtil.buildSessionFactory(HibernateUtil.java:16)
    at com.dataPack.data.HibernateUtil.<clinit>(HibernateUtil.java:10)
    at com.dataPack.data.Application.main(Application.java:9)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
    ... 7 more

这是我创建的用于构建sessionFactory的HibernateUtil类。

package com.dataPack.data;

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;


public class HibernateUtil {

    private static final SessionFactory sessionFactory = buildSessionFactory();

    private static SessionFactory buildSessionFactory() {

        Configuration configuration = null;
        try {
            configuration = new Configuration();

            return configuration
                    .buildSessionFactory(new StandardServiceRegistryBuilder()
                            .applySettings(configuration.getProperties())
                                .build());

        } catch(Exception e) {
            e.printStackTrace();
            throw new RuntimeException("Issue Building Session Factory!");
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}

这是我们应该使用的hibernate.properties文件。

hibernate.connection.username=user
hibernate.connection.password=password
hibernate.connection.url=jdbc:mysql://localhost:3306/ifinances
hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

1 个答案:

答案 0 :(得分:0)

由于该项目有效,因此其他人可能使用了不同的Java版本,因为jaxb Apis已从Java SE中删除。有多种解决方法(如How to resolve java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException in Java 9中所述),但最可靠的方法是将jaxb API依赖项(groupId javax.xml.bind,artifactId jaxb-api-https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api/2.3.0)添加到pom .xml或gradle构建文件。

然后重建,如果仍然遇到ClassNotFound错误,请参见https://stackoverflow.com/a/43574427/9705485