Java/Hibernate表不存在错误
我现在面临这个错误已经有一段时间了。通过在HibernateUtil类中映射实体,我找到了一个解决方法。但是,我希望使用hibernate.cfg.xml实现这一点 我得到的错误:Java/Hibernate表不存在错误,java,hibernate,Java,Hibernate,我现在面临这个错误已经有一段时间了。通过在HibernateUtil类中映射实体,我找到了一个解决方法。但是,我希望使用hibernate.cfg.xml实现这一点 我得到的错误: Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute statement at org.hibernate.in
Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute statement
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:147)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:162)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1441)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:491)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3201)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2411)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:467)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:146)
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:220)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:68)
at Main.main(Main.java:14)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'mydatabase.personentity' doesn't exist
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.Util.getInstance(Util.java:408)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:943)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2490)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2079)
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2013)
at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5104)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1998)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:205)
... 18 more
休眠配置:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mydatabase</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">password</property>
<property name="connection.pool_size">1</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<!-- List of mapped classes -->
<mapping class="PersonEntity"/>
</session-factory>
</hibernate-configuration>
Hibernate Util:
public class HibernateUtil
{
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure();
StandardServiceRegistry standardRegistry = new
StandardServiceRegistryBuilder()
.configure()
.build();
return configuration.buildSessionFactory(standardRegistry);
}
catch(Exception e) {
throw new ExceptionInInitializerError(e);
}
}
public static Session getSession()
{
return sessionFactory.openSession();
}
public static void close()
{
sessionFactory.close();
}
}
用于保存某些硬编码值的主类:
public class Main {
public static void main(String[] args) {
PersonEntity personEntity = new PersonEntity();
personEntity.setId(1);
personEntity.setName("Cris");
Session session = HibernateUtil.getSession();
session.beginTransaction();
session.save(personEntity);
session.getTransaction().commit();
}
}
如果有人能提供帮助,我将不胜感激,我认为问题在于hibernate.cfg.xml,但这只是我的猜测。
提前感谢如果数据库中存在该表,例如命名
人员
,则应使用@table
注释实体:
@Entity
@Table(name = "person")
public class PersonEntity
如果希望hibernate
为您创建表,应首先将hbm2ddl.auto
更改为create
,然后在创建表后将其更改回update
<property name="hbm2ddl.auto">create</property>
创建
顺便说一句,hibernate.cfg.xml
中的映射类应该是完整的包名。尝试将
更改为
(文档这样说)
您也应该更改Sql方言。对于MySQL 5.x,如果您使用的是InnoDB
表,则应该使用org.hibernate.dialent.mysql5innodbdialent
,如果您没有使用org.hibernate.dialent.mysql5dialent
请参阅。如果该表不存在,是否希望hibernate创建该表?或者该表是否存在?值得补充的是,当我将这些行放入hibernateUtil时,它工作正常:Configuration=new Configuration();configure.configure();addAnnotatedClass(PersonModel.class);创建一个表如果它不存在,是这一行引起的吗?update@Kris22这是配置文件中的全部内容吗<代码>休眠§.cfg.xml?它没有定义
属性来持久化PersonEntity
类。查找使用Hibernate创建表我已经尝试将其更改为创建,但它仍然表示该表不存在。在类上添加@table(name=“person”)
。也没有帮助。感谢您的帮助然后将mysql版本更改为5.1.38
,此配置对我很好,假设它也可以。我必须将方言更改为org.hibernate.dialogue.mysql5dialogue非常感谢您和其他人的帮助。@Kris22如果有助于解决您的问题,您应该接受答案,这对以后的用户非常有用。:)请参考:完成:)谢谢。
<property name="hbm2ddl.auto">create</property>