休眠類不映射

幫我解決我的問題.. 當我使用方法getDriversByBus(Bus bus)，我有一個映射問題。休眠類不映射

型號：總線 bus_id PK 數

驅動 driver_id PK 名

佈德裏弗 bus_id FK driver_id FK

總線

public class Bus { 
    private Long id; 
    private String number; 
    private Set drivers = new HashSet(); 

    public Bus(){ 

    } 

    public Long getId() { 
     return id; 
    } 

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

    public String getNumber() { 
     return number; 
    } 

    public void setNumber(String number) { 
     this.number = number; 
    } 

    public Set getDrivers() { 
     return drivers; 
    } 

    public void setDrivers(Set drivers) { 
     this.drivers = drivers; 
    } 



}

驅動

public class Driver { 
    private Long id; 
    private String name; 
    private Set busses = new HashSet(); 

    public Driver(){ 

    } 

    public Long getId() { 
     return id; 
    } 

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

    public String getName() { 
     return name; 
    } 

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

    public Set getBusses() { 
     return busses; 
    } 

    public void setBusses(Set busses) { 
     this.busses = busses; 
    } 


}

1類 - 驅動程序：

public class DriverDAOImpl implements DriverDAO{ 

@Override 
public void addDriver(Driver driver) throws SQLException { 
    // TODO Auto-generated method stub 
    Session session = null; 
    try { 
     session = HibernateUtil.getSessionFactory().openSession(); 
     session.beginTransaction(); 
     session.save(driver); 
     session.getTransaction().commit(); 


    } catch (Exception e) { 
     // TODO: handle exception 
     e.printStackTrace(); 
     JOptionPane.showMessageDialog(null, e.getMessage(), "Ошибка при вставке", JOptionPane.OK_OPTION); 
    } 

} 

@Override 
public Collection getAllDrivers() throws SQLException { 
    // TODO Auto-generated method stub 
    return null; 
} 

@Override 
public Collection getDriversByBus(Bus bus) throws SQLException { 
    // TODO Auto-generated method stub 
    Session session = null; 
    List drivers = new ArrayList<Driver>(); 
    try { 
     session = HibernateUtil.getSessionFactory().openSession(); 
     session.beginTransaction(); 
     Long bus_id = bus.getId(); 

     Query query = session.createQuery("select d"+ 
       " from com.ee.model.Driver d JOIN d.busses bus" 
       + " where bus.id =:busid ").setLong("busid", bus_id); 




     drivers = (List<Driver>)query.list(); 
     session.getTransaction().commit(); 



    } catch (Exception e) { 
     // TODO: handle exception 
     e.printStackTrace(); 
    } 

    finally{ 
     if(session!=null && session.isOpen()){ 
      session.close(); 
     } 
    } 
    return drivers; 
} 
}

2類 - 總線公共類BusDAOImpl實現BusDAO {

@Override 
public void addBus(Bus bus) throws SQLException { 
    // TODO Auto-generated method stub 

     Session session = null; 
     try { 
      session = HibernateUtil.getSessionFactory().openSession(); 
      session.beginTransaction(); 
      session.save(bus); 
      session.getTransaction().commit(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
      JOptionPane.showMessageDialog(null, e.getMessage(), "Ошибка при вставке", JOptionPane.OK_OPTION); 
     } finally { 
      if (session != null && session.isOpen()) { 

      session.close(); 
      } 
     } 
     } 


@Override 
public Collection getAllBusses() throws SQLException { 
    // TODO Auto-generated method stub 
     Session session = null; 
     List busses = new ArrayList<Bus>(); 
     try { 
      session = HibernateUtil.getSessionFactory().openSession(); 
      busses = session.createCriteria(Bus.class).list(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
      JOptionPane.showMessageDialog(null, e.getMessage(), "Ошибка 'getAll'", JOptionPane.OK_OPTION); 
     } finally { 
      if (session != null && session.isOpen()) { 
      session.close(); 
      } 
     } 
     return busses; 
     } 


@Override 
public Collection getDriverByBus(Driver driver) throws SQLException { 
    // TODO Auto-generated method stub 
    Session session = null; 
    List busses = new ArrayList<Bus>(); 
    try { 
     session = HibernateUtil.getSessionFactory().openSession(); 
     session.beginTransaction(); 
     Long driver_id = driver.getId(); 
     Query query = session.createQuery("select b "+ 
     "from Bus b INNER JOIN b.drivers driver"+ 
       " where driver.id =:driverid ").setLong("driverid", driver_id); 
     busses = (List<Bus>)query.list(); 
     session.getTransaction().commit(); 



    } catch (Exception e) { 
     // TODO: handle exception 
    } 
    finally{ 
     if(session!=null && session.isOpen()){ 
      session.close(); 
     } 
    } 

    return busses; 
} 

}

我的映射：

<?xml version="1.0"?> 
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 
<!-- Generated 22.02.2013 19:34:10 by Hibernate Tools 3.4.0.CR1 --> 
<hibernate-mapping> 
    <class name="com.ee.model.Bus" table="busses"> 
     <id name="id" type="java.lang.Long"> 
      <column name="bus_id" /> 
      <generator class="increment" /> 
     </id> 
     <property name="number" type="java.lang.String"> 
      <column name="NUMBER" /> 
     </property> 
     <set name="drivers" table="busdriver" inverse="false" lazy="false"> 
      <key> 
       <column name="bus_id" /> 
      </key> 
      <many-to-many column="driver_id" class="com.ee.model.Driver"></many-to-many> 
     </set> 
    </class> 
</hibernate-mapping> 


<?xml version="1.0"?> 
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 
<!-- Generated 22.02.2013 19:34:20 by Hibernate Tools 3.4.0.CR1 --> 
<hibernate-mapping> 
    <class name="com.ee.model.Driver" table="drivers"> 
     <id name="id" type="java.lang.Long"> 
      <column name="driver_id" /> 
      <generator class="increment" /> 
     </id> 
     <property name="name" type="java.lang.String"> 
      <column name="NAME" /> 
     </property> 
     <set name="busses" table="busdriver" inverse="false" lazy="false"> 
      <key> 
       <column name="driver_id" /> 
      </key> 
      <many-to-many column="bus_id" class="com.ee.model.Bus"></many-to-many> 

     </set> 
    </class> 
</hibernate-mapping>

個MainClass：

public class EEMain { 

    /** 
    * @param args 
    */ 
public static void main(String[] args) throws SQLException{ 
    // TODO Auto-generated method stub 



    Collection busses = Factory.getInstance().getBusDAO().getAllBusses(); 
    Iterator iter = busses.iterator(); 
    System.out.println("All busses"); 
    while(iter.hasNext()){ 
     Bus bus = (Bus) iter.next(); 
     Collection drivers = Factory.getInstance().getDriverDAO().getDriversByBus(bus); 
     Iterator itr2 = drivers.iterator(); 
     System.out.println("Bus # " + bus.getNumber()); 
     while (itr2.hasNext()){ 
      Driver driver = (Driver) itr2.next(); 
      System.out.println("Name: "+ driver.getName()); 
     } 
    } 



}

}

hibernate.cfg

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC 
     "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
     "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory name="ee"> 
     <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
     <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1/mydb</property> 
     <property name="hibernate.connection.username">root</property> 
     <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
     <property name="connection.pool_size">1</property> 
    <property name="current_session_context_class">thread</property> 
    <property name="show_sql">true</property> 
    <mapping resource="com/ee/model/Driver.hbm.xml"/> 
    <mapping resource="com/ee/model/Bus.hbm.xml"/> 
    </session-factory> 
    </hibernate-configuration>

廠

public class Factory { 
    private static BusDAO busDAO = null; 
    private static DriverDAO driverDAO = null; 
    private static Factory instance = null; 

    public static synchronized Factory getInstance(){ 
      if (instance == null){ 
       instance = new Factory(); 
      } 
      return instance; 
      } 


     public BusDAO getBusDAO(){ 
     if (busDAO == null){ 
      busDAO = new BusDAOImpl(); 
     } 
     return busDAO; 
     } 

     public DriverDAO getDriverDAO(){ 
     if (driverDAO == null){ 
      driverDAO = new DriverDAOImpl(); 
     } 
     return driverDAO; 
     } 

}

的HibernateUtil：

public class HibernateUtil { 
     private static final SessionFactory sessionFactory; 
     static { 
      try { 
      sessionFactory = new Configuration().configure().buildSessionFactory(); 
      } catch (Throwable ex) { 
      System.err.println("Initial SessionFactory creation failed." + ex); 
      throw new ExceptionInInitializerError(ex); 
      } 
     } 

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

錯誤文本：

 
log4j:WARN No appenders could be found for logger (org.jboss.logging). 
log4j:WARN Please initialize the log4j system properly. 
Hibernate: select this_.bus_id as bus1_2_0_, this_.NUMBER as NUMBER2_0_ from busses this_ 
Hibernate: select drivers0_.bus_id as bus2_2_1_, drivers0_.driver_id as driver1_1_1_, driver1_.driver_id as driver1_0_0_, driver1_.NAME as NAME0_0_ from busdriver drivers0_ inner join drivers driver1_ on drivers0_.driver_id=driver1_.driver_id where drivers0_.bus_id=? 
Hibernate: select busses0_.driver_id as driver1_0_1_, busses0_.bus_id as bus2_1_1_, bus1_.bus_id as bus1_2_0_, bus1_.NUMBER as NUMBER2_0_ from busdriver busses0_ inner join busses bus1_ on busses0_.bus_id=bus1_.bus_id where busses0_.driver_id=? 
All busses 
org.hibernate.hql.internal.ast.QuerySyntaxException: drivers is not mapped [select d from drivers d , busses b where d.id = b.id and b.id =: busid] 
Bus # 10 
    at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:180) 
    at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110) 
    at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:93) 
    at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:324) 
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3291) 
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3180) 
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:706) 
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:562) 
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299) 
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:248) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.(HQLQueryPlan.java:105) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.(HQLQueryPlan.java:80) 
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168) 
    at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:221) 
    at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:199) 
    at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1735) 
    at com.ee.DAO.DriverDAOImpl.getDriversByBus(DriverDAOImpl.java:59) 
    at com.ee.EEMain.main(EEMain.java:36)

來源

2013-02-23 Султан Абубакиров

爲什麼你的映射中有一段java代碼？它是上面的java程序的一部分，還是它的一部分？ – user15 2013-02-23 12:59:20

您可能忘了在主休眠配置文件中添加Driver類/映射文件。 – 2013-02-23 13:00:47

你在哪裏建立你的sessionfactory？ – 2013-02-23 13:01:48

讓我們嘗試隔離問題來源。既然你聲明你的套件不是懶惰的。當您嘗試在bus.getDrivers（）上進行迭代時，它會告訴您什麼？

來源

2013-02-23 13:55:41

爲什麼它不被修正？我有很多很多的關係它意味着創建一個特殊的表「busdriver」 – 2013-02-23 14:01:16

好吧，對不起，我沒有看到多對多的關係。再次抱歉。我現在會看到 – 2013-02-23 14:06:14

如果我更改任何名稱的「busdriver」，我有錯誤「表'mydb.busdriver1'不存在」 – 2013-02-23 14:06:49

它看起來對我來說，有mode.Driver和model.Driver之間的mixup。從Hibernate生成的SQL和錯誤消息正在討論com.ee.mode.Driver，但大多數上面的映射和代碼都有com.ee.model.Driver。

我看不到上面代碼中的錯誤，如果它在java中，它可能不會編譯，因此我懷疑配置文件比上面提到的問題中的那個文件中的文件糾正。

我認爲真正的問題是，Hibernate正在Bus類中尋找一個名爲「drivers」的Set。我不認爲巴士班的代碼已經包含在上面，但我認爲這是問題的核心。也許它有錯誤的名字或其他東西。它應該看起來像：

public class Bus { 
private int id; 
// Blah blah 
private Set drivers; 
// blah 
}

來源

2013-02-23 13:18:17

好吧，我改變了com.ee.model.Driver，但它沒有幫助） – 2013-02-23 13:24:26

你在哪裏改變這個，你仍然得到相同的錯誤或新的錯誤？我認爲可能需要改變的文件是Bus的映射。 – 2013-02-23 13:25:45

在源和here..and這裏更改 – 2013-02-23 13:28:48

休眠類不映射

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