Question

我有一些hibernate的问题。我正在分享我的代码我得到的错误

＆＃34; C：\ Program Files \ Java \ jdk1.8.0_161 \ bin \ java＆＃34; -Dfile.encoding = windows-1250 -jar C：\ Users \ kubci \ IdeaProjects \ FinalProject \ target \ hibernate-1.0-SNAPSHOT-jar-with-dependencies.jar maj 29,20188 7:41:56 PM org.hibernate.Version logVersion 信息：HHH000412：休眠核心{[WORKING]} maj 29,20188 7:41:56 PM org.hibernate.cfg.Environment 信息：HHH000206：找不到hibernate.properties maj 29,20188 7:41:57 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager 信息：HCANN000001：Hibernate Commons Annotations {5.0.3.Final} maj 29,20188 7:41:58 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl 配置警告：HHH10001002：使用Hibernate内置连接池（不用于生产！） maj 29,20188 7:41:58 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 信息：HHH10001005：在URL [jdbc：mysql：// localhost：3306 / loginpanel]上使用驱动程序[com.mysql.jdbc.Driver] maj 29,20188 7:41:58 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 信息：HHH10001001：连接属性：{user = root，password = ****} maj 29,20188 7:41:58 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 信息：HHH10001003：自动提交模式：false maj 29,20188 7:41:58 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl $ PooledConnections 信息：HHH000115：Hibernate连接池大小：20（min = 1） maj 29,20188 7:41:58 PM org.hibernate.dialect.Dialect 信息：HHH000400：使用方言：org.hibernate.dialect.MySQLDialect 线程＆＃34; main＆＃34;中的例外情况org.hibernate.boot.registry.classloading.spi.ClassLoadingException：无法加载类[pl.Final.Project.entities.LoginConnection] 在org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName（ClassLoaderServiceImpl.java:354）在org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl。（AnnotationMetadataSourceProcessorImpl.java:105）在org.hibernate.boot.model.process.spi.MetadataBuildingProcess $ 1.（MetadataBuildingProcess.java:156）在org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete（MetadataBuildingProcess.java:150）在org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build（MetadataBuildingProcess.java:84）在org.hibernate.boot.internal.MetadataBuilderImpl.build（MetadataBuilderImpl.java:474）在org.hibernate.boot.internal.MetadataBuilderImpl.build（MetadataBuilderImpl.java:85）在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:689）在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:724）在pl.Final.Project.Main.main（Main.java:19）引起：java.lang.ClassNotFoundException：无法加载请求的类：pl.Final.Project.entities.LoginConnection at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl $ AggregatedClassLoader.findClass（ClassLoaderServiceImpl.java:342） at java.lang.ClassLoader.loadClass（ClassLoader.java:424） at java.lang.ClassLoader.loadClass（ClassLoader.java:357） at java.lang.Class.forName0（Native Method）在java.lang.Class.forName（Class.java:348） at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName（ClassLoaderServiceImpl.java:351） ... 9更多

这是我的主。

package pl.Final.Project;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import pl.Final.Project.entities.LoginUser;

import javax.security.auth.login.AppConfigurationEntry;
import javax.security.auth.login.Configuration;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Main {
    private static SessionFactory factory;
    public static void main(String[] args) {
        factory = new org.hibernate.cfg.Configuration().configure().buildSessionFactory();
        System.exit(0);
    }
    public static ArrayList<LoginUser> getUsersList(){
        Session session = factory.openSession();
        Transaction tx = null;
        ArrayList<LoginUser> usersArrayList= new ArrayList<>();
        try{
            tx = session.beginTransaction();
            List customerList = session.createQuery("FROM pl.Final.Project.entities.LoginUser WHERE id=1").list();
            for(Iterator iterator = customerList.iterator(); iterator.hasNext();){
                LoginUser c =(LoginUser) iterator.next();
                usersArrayList.add(c);
            }
            tx.commit();

        }catch (HibernateException e){
            if(tx!=null){
                tx.rollback();
            }
        }finally {
            session.close();
        }
        return usersArrayList;
    }
}

和cfg.xml和hmb.xml文件

    <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration SYSTEM

        "http://hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/loginpanel</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password"></property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

        <mapping class="pl.Final.Project.entities.LoginConnection" />
    </session-factory>
</hibernate-configuration>

<?xml version = "1.0" encoding = "utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name = "pl.Final.Project.entities.LoginUser" table = "tuser">

        <meta attribute = "class-description">
           Login Customer mapping
        </meta>

        <id name = "id" type = "int" column = "id">
            <generator class="native"/>
        </id>

        <property name = "login" column = "login" type = "string"/>
        <property name = "password" column = "password" type = "string"/>
        <property name = "name" column = "name" type = "string"/>
        <property name = "surname" column = "surname" type = "string"/>

    </class>
</hibernate-mapping>

我不知道该怎么做。我有这个代码的另一个项目，它的工作原理。我做了复制和粘贴，更改了一些细节，如路径等。有一些错误，我认为这是问题所在：

线程中的异常＆＃34; main＆＃34; org.hibernate.boot.registry.classloading.spi.ClassLoadingException：无法加载类[pl.Final.Project.entities.LoginConnection]

Answer 1

您遇到的异常清楚地表明无法加载LoginConnection类。然而，没有可见的LoginConnection类。您已将LoginConnection添加为Hibernate会话的映射类，但缺少LoginConnection的源代码。也许你应该首先创建LoginConnection类，然后才能加载它？

或者你是否意外地写了LoginConnection而不是LoginUser？

Hibernate没有看到路径

1 个答案: