hibernate connection problem
I had set up hibernate plugin to NetBeans and can not connect to MySQL dbs - the code:
package client;
import org.hibernate.*;
import org.hibernate.cfg.*;
import java.util.*;
public class HiberTest {
private static SessionFactory sessionFactory;
private int id;
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
protected static void setUp() throws Exception {
// A SessionFactory is set up once for an application
sessionFactory = new Configuration()
.configure() // configures settings from hibernate.cfg.xml
.buildSessionFactory();
}
public static void main(String[] args) throws Exception {
setUp();
Session session = HibernateUtils.getSessionFactory().openSession();
session.beginTransaction();
Query q = session.createQuery("CREATE TABLE test(myInt int not null)");
List resultList = q.list();
System.out.println(resultList);
session.getTransaction().commit();
session.close();
}
}
HibernateUtils.class
package client;
import org.hibernate.cfg.*;
import org.hibernate.SessionFactory;
public class HibernateUtils {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate.cfg.xml
return new Configuration().configure().buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
The errors:
May 22, 2011 12:40:33 PM org.hibernate.hql.ast.ErrorCounter reportError
SEVERE: line 1:1: unexpected token: CREATE
Exception in thread "main" java.lang.IllegalArgumentException: node to traverse cannot be null!
at org.hibernate.hql.ast.util.NodeTraverser.traverseDepthFi开发者_开发百科rst(NodeTraverser.java:31)
at org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:254)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:157)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56)
at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72)
at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623)
at client.HiberTest.main(HiberTest.java:36)
Java Result: 1
Please help me with this that is a drag for me to deal with hibernate. After all cfg changes I desided to post cfg.xml and hbm.xml may be someone would suggest something here they are: cfg.xml
<?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>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://myhost:3306/wwwgeeksearthcom_geeksearth_test</property>
<property name="hibernate.connection.username">user_name</property>
<property name="hibernate.connection.password">**********</property>
<property name="hibernate.show_sql">true</property>
<!--<property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTransactionFactory</property>-->
<mapping resource="hibernate.hbm.xml"/>
</session-factory>
</hibernate-configuration>
and hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="HiberTest" table="guests">
<id name="id" column="g_id">
<generator class="native"/>
</id>
</class>
</hibernate-mapping>
the log already said that the <class>
inside the mapping file hibernate.hbm.xml
is not properly formatted because of the following error :
The content of element type "class" is incomplete, it must match "(meta*,subselect?,cache?,synchronize*,comment?,tuplizer*,(id|composite-id),discriminator?,natural-id?,(version|timestamp)?,(property|many-to-one|one-to-one|component|dynamic-component|properties|any|map|set|list|bag|idbag|array|primitive-array),((join,subclass*)|joined-subclass*|union-subclass*),loader?,sql-insert?,sql-update?,sql-delete?,filter*,resultset*,(query|sql-query)*)"
This error message means that you violate some requirements of the <class>
, for example:
- It can only contain the child elements listed inside the parenthese
- The * sign means that child element can occur zero or more times.
- The ? sign means that child element can occur zero or one time.
- Without any * and ? sign , that child element must be included and included only once (e.g. id )
You can refer to this to know how to read the DTD elements syntax.
you should use on .xml file check xml
and validate xml
as this menu is availabe with netbeans just right click on xml and check
精彩评论