如何在复合主键中插入休眠

我在使用Hibernate + hsqldb的java应用程序时遇到了一些麻烦。 Here is database schema I created. 我使用hibernate.cfg.xml配置了Hibernate，并使用Intellij Idea的“Generate Persistance Mapping”功能为它们生成了所有的pojos和映射。如何在复合主键中插入休眠

这些生成的文件：

的POJO：

User.java

public class User { 
    private int id; 
    private String name; 
    private String lastname; 
    private String patronym; 
    private Date birthdate; 
    private String email; 
    private String password; 
    private Set<Disk> disks; 
    private Set<Takenitem> takenDisks; 

    //setters, getters and constructors; 
}

Disk.java

public class Disk { 
    private int id; 
    private String name; 
    private User host; 

    //setters, getters and constructors; 
}

Takenitem.java

public class Takenitem { 
    private int iddisk; 
    private int iduser; 
    private User tempUser; 
    private Disk disk; 

    //setters, getters and constructors; 
}

TakenitemPK.java（复合ID类）

public class TakenitemPK implements Serializable { 
    private int iddisk; 
    private int iduser; 
    //setters, getters and constructors; 
}

个

映射：

User.hbm.xml

<?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-3.0.dtd"> 
<hibernate-mapping> 

    <class name="com.dvdexchange.User" table="USER" schema="PUBLIC" catalog="PUBLIC"> 
     <id name="id" type="int"> 
      <column name="ID" /> 
      <generator class="native" /> 
     </id> 
     <property name="name" column="NAME"/> 
     <property name="lastname" column="LASTNAME"/> 
     <property name="patronym" column="PATRONYM"/> 
     <property name="birthdate" column="BIRTHDATE"/> 
     <property name="email" column="EMAIL"/> 
     <property name="password" column="PASSWORD"/> 
     <set name="disks" inverse="true"> 
      <key> 
       <column name="IDHOST"/> 
      </key> 
      <one-to-many not-found="ignore" class="com.dvdexchange.Disk"/> 
     </set> 
     <set name="takenDisks" inverse="true"> 
      <key> 
       <column name="IDUSER"/> 
      </key> 
      <one-to-many not-found="ignore" class="com.dvdexchange.Takenitem"/> 
     </set> 
    </class> 
</hibernate-mapping>

Disk.hbm.xml

<?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-3.0.dtd"> 
<hibernate-mapping> 

    <class name="com.dvdexchange.Disk" table="DISK" schema="PUBLIC" catalog="PUBLIC"> 
     <id name="id" type="int"> 
      <column name="ID" /> 
      <generator class="native" /> 
     </id> 
     <property name="name" column="NAME"/> 
     <many-to-one name="host" class="com.dvdexchange.User"> 
      <column name="IDHOST"/> 
     </many-to-one> 
    </class> 
</hibernate-mapping>

Takenitem.hbm.xml

<?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-3.0.dtd"> 
<hibernate-mapping> 

    <class name="com.dvdexchange.Takenitem" table="TAKENITEM" schema="PUBLIC" catalog="PUBLIC"> 
     <composite-id mapped="true" class="com.dvdexchange.TakenitemPK"> 
      <key-property name="iddisk" column="IDDISK"/> 
      <key-property name="iduser" column="IDUSER"/> 
     </composite-id> 
     <many-to-one name="tempUser" class="com.dvdexchange.User" insert="false" update="false"> 
      <column name="IDUSER"/> 
     </many-to-one> 
     <many-to-one name="disk" class="com.dvdexchange.Disk"/> 
    </class> 
</hibernate-mapping>

一切工作正常，但是当我不能在Takenitem实现插入。下面是代码：

Main.java

public class Main { 
    public static void main(String[] args) throws IOException { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); 
     UserDAO userDAO = new UserDAOHibernateImpl(); 
     DiskDAO diskDAO = new DiskDAOHibernateImpl(); 
     TakenItemDAO takenItemDAO = new TakenItemDAOHibernateImpl(); 
     System.out.println("Application started:"); 

     takenItemDAO.addBorrowing(1, 24); 
    } 
}

TakenItemDAOHibernateImpl.java（。addBorrowing（））

public void addBorrowing(int iduser, int iddisk) { 
     Session session = HibernateUtil.getSessionFactory().openSession(); 
     Transaction tx = null; 
     try{ 
      tx = session.beginTransaction(); 
      Criteria crTempUser = session.createCriteria(User.class); 
      crTempUser.add(Restrictions.eq("id", iduser)); 
      User tempUser = (User) crTempUser.uniqueResult(); 

      Criteria crBorrowedDisk = session.createCriteria(Disk.class); 
      crBorrowedDisk.add(Restrictions.eq("id", iddisk)); 
      Disk borrowedDisk = (Disk) crBorrowedDisk.uniqueResult(); 

      Takenitem takenitem = new Takenitem(iduser, iddisk, tempUser, borrowedDisk); 
      session.save(takenitem); 
      tx.commit(); 
     }catch (HibernateException e) { 
      if (tx != null) tx.rollback(); 
      e.printStackTrace(); 
     } finally { 
      session.close(); 
     } 
    }

当我运行我的节目，我有以下异常：

Hibernate: select this_.ID as ID1_2_0_, this_.NAME as NAME2_2_0_, this_.LASTNAME as LASTNAME3_2_0_, this_.PATRONYM as PATRONYM4_2_0_, this_.BIRTHDATE as BIRTHDAT5_2_0_, this_.EMAIL as EMAIL6_2_0_, this_.PASSWORD as PASSWORD7_2_0_ from PUBLIC.USER this_ where this_.ID=? 
Hibernate: select this_.ID as ID1_0_0_, this_.NAME as NAME2_0_0_, this_.IDHOST as IDHOST3_0_0_ from PUBLIC.DISK this_ where this_.ID=? 
Hibernate: insert into PUBLIC.TAKENITEM (disk, IDDISK, IDUSER) values (?, ?, ?) 
мар 01, 2016 6:02:38 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions 
WARN: SQL Error: -5501, SQLState: 42501 
мар 01, 2016 6:02:38 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions 
ERROR: user lacks privilege or object not found: DISK 
мар 01, 2016 6:02:38 PM org.hibernate.internal.SessionImpl$5 mapManagedFlushFailure 
ERROR: HHH000346: Error during managed flush [could not prepare statement] 
org.hibernate.exception.SQLGrammarException: could not prepare statement 
    at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63) 
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) 
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111) 
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:182) 
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareStatement(StatementPreparerImpl.java:78) 
    at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.buildBatchStatement(AbstractBatchImpl.java:136) 
    at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.getBatchStatement(AbstractBatchImpl.java:125) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2902) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3421) 
    at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:89) 
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:560) 
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:434) 
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337) 
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) 
    at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1295) 
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:468) 
    at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3135) 
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2352) 
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485) 
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147) 
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38) 
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231) 
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65) 
    at com.dvdexchange.dao.impl.TakenItemDAOHibernateImpl.addBorrowing(TakenItemDAOHibernateImpl.java:31) 
    at com.dvdexchange.main.Main.main(Main.java:32) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) 
Caused by: java.sql.SQLSyntaxErrorException: user lacks privilege or object not found: DISK 
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) 
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) 
    at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source) 
    at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source) 
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$1.doPrepare(StatementPreparerImpl.java:87) 
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) 
    ... 26 more

看看SQL日志和此消息ERROR: user lacks privilege or object not found: DISK。

我该如何解决？为什么Ii不工作。请帮帮我。

在此先感谢！

来源

2016-03-01 IngeniousTom

找不到对象的原因错误在于该列在hsqldb中定义为区分大小写。

来源

2016-03-01 13:20:35 Gopal00005

我应该改变什么？ Actualy表“takenitem”只有iddisk和iduser列。那么，什么是错的？注意我的eddited方法代码 – IngeniousTom

只要确保* .hbm.xml中引用的所有列名和表名都与数据库表名和列名的名称和大小写匹配。 – Gopal00005

我很舒服。我的程序工作正常与本地URL，但是当我运行我的Hibernate与此URL：jdbc：hsqldb：mem：test然后我总是收到此消息，找不到一些对象（（（（ – IngeniousTom

如何在复合主键中插入休眠

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