Question

我们使用spring，hibernate和hsql来持久化一个简单的用户实体。我们总是得到错误“table not found”。你知道这可能是什么吗？看起来好像没有生成表，或者hsql数据库根本没有运行。

此致 -G。

@Entity
@Table (name="USER")
public class User {


 @Id
 @GeneratedValue(strategy= GenerationType.AUTO)
 @Column(name="ID")
 private Long id;

 @Column(name="NAME", length = 100, nullable = false)
 private String name;

 public User(){}

        //getters and setters ...

由这个dao类：

package de.hsrm.mediathek;

import java.util.List;

public class UserDao implements IUserDao{

    private HibernateTemplate hibernateTemplate;

    public void setHibernateTemplate(final HibernateTemplate hibernateTemplate){
        this.hibernateTemplate = hibernateTemplate;
    }

    @Transactional
    public void store(final User user){
        hibernateTemplate.saveOrUpdate(user);
    }

    @Transactional
    public void delete(final Long userId){
        final User user = (User) hibernateTemplate.get(User.class, userId);
        hibernateTemplate.delete(user);
    }

    @Transactional(readOnly = true)
    public User findById(final Long userId){
        return (User) hibernateTemplate.get(User.class, userId);
    }

    @Transactional(readOnly = true)
    public List<User> findAll(){
        return hibernateTemplate.find("from User");
    }

}

配置XML：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/tx
           http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">


 <tx:annotation-driven/>

 <bean id="dataSource"
   class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName" value="org.hsqldb.jdbcDriver" />
  <property name="url" value="jdbc:hsqldb:mem:mediathekdb" />
  <property name="username" value="sa" />
  <property name="password" value="" />
 </bean>

 <bean id="sessionFactory"
  class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="annotatedClasses">
   <list>
    <value>de.hsrm.mediathek.User</value>
   </list>
  </property>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop>
    <prop key="hibernate.hbm2dll.auto">create-drop</prop>
    <prop key="hibernate.show_sql">true</prop>
    <prop key="hibernate.format_sql">true</prop>
    <prop key="hibernate.connection.pool_size">10</prop>  
    <prop 
     key="hibernate.cache.provider_class">
     org.hibernate.cache.HashtableCacheProvider</prop> 
   </props>
  </property>

 </bean>

 <bean id="hibernateTemplate"
  class="org.springframework.orm.hibernate3.HibernateTemplate">
  <property name="sessionFactory" ref="sessionFactory"/>
 </bean>

 <bean id="userDao" class="de.hsrm.mediathek.UserDao">
  <property name="hibernateTemplate" ref="hibernateTemplate" />
 </bean>

 <bean id="transactionManager"
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory" />
 </bean>

 <!-- Interceptor for hibernate calls to be able to create and close sessions 
 <bean id="hibernateInterceptor"
  class="org.springframework.orm.hibernate3.HibernateInterceptor">
  <property name="sessionFactory"><ref local="sessionFactory"/></property>
 </bean> 
-->
</beans>

错误日志：

Caused by: java.sql.SQLException: Table not found in statement [insert into User (ID, NAME) values (null, ?)]
 at org.hsqldb.jdbc.Util.throwError(Unknown Source)
 at org.hsqldb.jdbc.jdbcPreparedStatement.<init>(Unknown Source)
 at org.hsqldb.jdbc.jdbcConnection.prepareStatement(Unknown Source)
 at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:528)
 at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:95)
 at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDelegate.java:30)
 ... 63 more

Answer 1

问题是属性“hbm2dll”拼写错误。它应该是“hbm2ddl”：

是：

<prop key="hibernate.hbm2dll.auto">create-drop</prop>

应该是：

<prop key="hibernate.hbm2ddl.auto">create-drop</prop>

Answer 2

最好还是留意任何其他错误的日志，因为我遇到了类似的问题，并发现创建表语句失败了，因为Hibernate生成的HSQLDB的DDL和Hibernate正在默默吞噬它

2011-06-09 10:48:30,722 [main] ERROR org.hibernate.tool.hbm2ddl.SchemaExport - Wrong data type: ALERT_ID in statement [create table ACCOUNT_ALERT (ALERT_ID numeric generated by default as identity (start with 1)]

后来我更改了以下内容

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="ALERT_ID")
private BigInteger alertId;

到

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@Column(name="ALERT_ID")
private BigInteger alertId;

它完美无缺。

Answer 3

我建议尝试使用以下命令在服务器模式下运行HSQLDB：

java -classpath hsqldb.jar org.hsqldb.server.Server

使用数据库管理器检查它是否正在运行：

java -classpath hsqldb.jar org.hsqldb.util.DatabaseManagerSwing

接下来，更改您的Hibernate URL，因此它使用服务器模式HSQLDB：

<property name="url" value="jdbc:hsqldb:mediathekdb" />

我使用这种方法取得了成功。使用仅内存实例时，create-drop可能无法正常工作。

Hibernate，Spring＆amp; HSQL：表未找到异常

3 个答案: