java - 使用 hibernate 5 Java 8时 hibernate 未知实体

当我要保存我的对象时，它将引发未知的实体异常。

提前发送


  线程“主” org.hibernate.MappingException中的异常：未知
  实体：com.simpleProgrammer.User，位于
  org.hibernate.metamodel.internal.MetamodelImpl.entityPersister（MetamodelImpl.java:618）
    在
  org.hibernate.internal.SessionImpl.getEntityPersister（SessionImpl.java:1595）
    在
  org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId（AbstractSaveEventListener.java:104）
    在
  org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId（DefaultSaveOrUpdateEventListener.java:192）
    在
  org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId（DefaultSaveEventListener.java:38）
    在
  org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient（DefaultSaveOrUpdateEventListener.java:177）
    在
  org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate（DefaultSaveEventListener.java:32）
    在
  org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate（DefaultSaveOrUpdateEventListener.java:73）
    在org.hibernate.internal.SessionImpl.fireSave（SessionImpl.java:667）
    在org.hibernate.internal.SessionImpl.save（SessionImpl.java:659）处
  org.hibernate.internal.SessionImpl.save（SessionImpl.java:654）在
  com.simpleProgrammer.Program.main（Program.java:22）


我的hibernate.cfg.xml文件在这里

<?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.password">root</property>
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/protein_tracker</property>
  <property name="hibernate.connection.username">root</property>
  <!--   <property name="hibernate.default_schema"></property> -->
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
  <property name="hibernate.show_sql">true</property>
  <property name="hibernate.hbm2ddl.auto">create</property>
  <mapping resource="com/simpleProgrammer/User.hbm.xml"/>
 </session-factory>
</hibernate-configuration>

我的User.hbm.xml映射文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
                                   "http://www.hibernate.org/dtd/hibernate-mapping">
<hibernate-mapping>
    <class name="com.simpleProgrammer.User" table="USERS">
        <id name="id" type="int" column="id">
            <generator class="identity" />
        </id>
        <property name="name" column="NAME" type="string" />
        <component name="proteinData">
            <property name="total" column="TOTAL" type="int" />
            <property name="goal" column="GOAL" type="int" />
        </component>
        <set name="history" table="USER_HISTORY">
            <key column="ID"/>
            <composite-element class="com.simpleProgrammer.UserHistory">
                <property name="entryTime" type="date" column="ENTRY_TIME"/>
                <property name="entry" type="string" column="ENTRY"/>
            </composite-element>
        </set>
    </class>
</hibernate-mapping>

我的progaram.java

package com.simpleProgrammer;

import java.util.Date;

import org.hibernate.Session;

public class Program {

    public static void main(String[] args) {

        Session session = new HibernateUtilities().getSessionFactory().openSession();
        System.out.println("Session Opened!!!");
        session.beginTransaction();
        System.out.println("Transaction begined!");

        User user = new User();
        user.setName("Joe");
        user.getHistory().add(new UserHistory(new Date(), "Setting Name to Joe"));
        user.getProteinData().setGoal(250);
        user.getHistory().add(new UserHistory(new Date(), "Setting Goal to 250!"));
        System.out.println("Setting user Object");
        session.save(user);
        System.out.println("Saving user object on table");
        session.getTransaction().commit();
        System.out.println("Transaction Commited!");

        session.beginTransaction();
        User loadedUser = session.get(User.class, 1);
        System.out.println(loadedUser.getName());
        System.out.println(loadedUser.getProteinData().getGoal());
        System.out.println(loadedUser.getProteinData().getTotal());
        loadedUser.getProteinData().setTotal(loadedUser.getProteinData().getTotal() + 50);
        loadedUser.getHistory().add(new UserHistory(new Date(), "Added 50 Protein!"));
        for (UserHistory history : loadedUser.getHistory()) {
            System.out.println(history.getEntryTime().toString() + " " + history.getEntry());
        }

        session.getTransaction().commit();
        session.close();
        System.out.println("Session Closed!!!");
        HibernateUtilities().getSessionFactory().close();
        System.out.println("Session Factory Closed");
    }
}

用户类别

package com.simpleProgrammer;

import java.util.HashSet;
import java.util.Set;

public class User {

    private int id;
    private String name;
    private ProteinData proteinData = new ProteinData();
    private Set<UserHistory> history =  new HashSet<UserHistory>();

    public Set<UserHistory> getHistory() {
        return history;
    }

    public void setHistory(Set<UserHistory> history) {
        this.history = history;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public ProteinData getProteinData() {
        return proteinData;
    }

    public void setProteinData(ProteinData proteinData) {
        this.proteinData = proteinData;
    }
}

here is my project structure

最佳答案

我认为您应该检查其他配置文件。“未知实体”意味着您的应用程序在路径中找不到类似User.hbm.xml的内容。