有人可以告诉我为什么我会得到 java.sql.SQLException: This function is not supported using HSQL and Spring？我正在尝试在我的数据库中插入一个新行..
下面是我的 DAO，我在 mySession.save(message) 行收到错误：
@Transactional
@Repository
public class MessageDaoImpl implements MessageDao
{
private Log log = null;
@Autowired
private SessionFactory sessionFactory;
public MessageDaoImpl()
{
super();
log = LogFactory.getLog(MessageDaoImpl.class);
}
@SuppressWarnings("unchecked")
@Transactional(readOnly = true, propagation = Propagation.REQUIRED)
public List<Message> listMessages()
{
try
{
return (List<Message>) sessionFactory.getCurrentSession()
.createCriteria(Message.class).list();
} catch (Exception e)
{
log.fatal(e.getMessage());
return null;
}
}
@SuppressWarnings("unchecked")
@Transactional(readOnly = false, propagation = Propagation.REQUIRED)
public void SaveOrUpdateMessage(Message message)
{
try
{
Session mySession = sessionFactory.getCurrentSession();
mySession.save(message);
mySession.flush();
} catch (Exception e)
{
log.fatal(e.getMessage());
}
}
}
这是我的主要课程：
public static void main(String[] args)
{
ApplicationContext context = new AnnotationConfigApplicationContext(HelloWorldConfig.class);
MessageService mService = context.getBean(MessageService.class);
HelloWorld helloWorld = context.getBean(HelloWorld.class);
/**
* Date: 4/26/13 / 9:26 AM
* Comments:
*
* I added Log4J to the example.
*/
LOGGER.debug("Message from HelloWorld Bean: " + helloWorld.getMessage());
Message message = new Message();
message.setMessage(helloWorld.getMessage());
//
mService.SaveMessage(message);
helloWorld.setMessage("I am in Staten Island, New York");
LOGGER.debug("Message from HelloWorld Bean: " + helloWorld.getMessage());
}
}
这是我的数据库配置：
public class DatabaseConfig
{
private static final Logger LOGGER = getLogger(DatabaseConfig.class);
@Autowired
Environment env;
@Bean
public DataSource dataSource() {
EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
EmbeddedDatabase db = builder.setType(EmbeddedDatabaseType.HSQL).
addScript("schema.sql").build();
return db;
}
@Bean
public DataSource hsqlDataSource() {
BasicDataSource ds = new BasicDataSource();
try {
ds.setDriverClassName("org.hsqldb.jdbcDriver");
ds.setUsername("sa");
ds.setPassword("");
ds.setUrl("jdbc:hsqldb:mem:mydb");
}
catch (Exception e)
{
LOGGER.error(e.getMessage());
}
return ds;
}
@Bean
public SessionFactory sessionFactory()
{
LocalSessionFactoryBean factoryBean = new LocalSessionFactoryBean();
factoryBean.setDataSource(hsqlDataSource());
factoryBean.setHibernateProperties(getHibernateProperties());
factoryBean.setPackagesToScan(new String[]{"com.xxxxx.HelloSpringJavaBasedJavaConfig.model"});
try
{
factoryBean.afterPropertiesSet();
} catch (IOException e)
{
LOGGER.error(e.getMessage());
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
return factoryBean.getObject();
}
@Bean
public Properties getHibernateProperties()
{
Properties hibernateProperties = new Properties();
hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
hibernateProperties.setProperty("hibernate.use_sql_comments", env.getProperty("hibernate.use_sql_comments"));
hibernateProperties.setProperty("hibernate.format_sql", env.getProperty("hibernate.format_sql"));
hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
hibernateProperties.setProperty("hibernate.generate_statistics", env.getProperty("hibernate.generate_statistics"));
hibernateProperties.setProperty("javax.persistence.validation.mode", env.getProperty("javax.persistence.validation.mode"));
//Audit History flags
hibernateProperties.setProperty("org.hibernate.envers.store_data_at_delete", env.getProperty("org.hibernate.envers.store_data_at_delete"));
hibernateProperties.setProperty("org.hibernate.envers.global_with_modified_flag", env.getProperty("org.hibernate.envers.global_with_modified_flag"));
return hibernateProperties;
}
@Bean
public HibernateTransactionManager hibernateTransactionManager()
{
HibernateTransactionManager htm = new HibernateTransactionManager();
htm.setSessionFactory(sessionFactory());
htm.afterPropertiesSet();
return htm;
}
}
这就是我要进入控制台的内容：
Exception in thread "main" org.hibernate.AssertionFailure: null id in com.xxx.HelloSpringJavaBasedJavaConfig.model.Message entry (don't flush the Session after an exception occurs)
这是我的消息模型 bean：
@Entity
@Table(name = "messages")
public class Message
{
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.AUTO)
private String id;
@Column(name = "message")
private String message;
public String getId()
{
return id;
}
public void setId(String id)
{
this.id = id;
}
public String getMessage()
{
return message;
}
public void setMessage(String message)
{
this.message = message;
}
@Override
public String toString()
{
return "Message{" +
"id='" + id + '\'' +
", message='" + message + '\'' +
'}';
}
}