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Connecting to mysql database using IntelliJ [duplicate]

first of all I couldn't find an answer from related questions in this forum. I am new to Hibernate technology and I am trying to run a basic example from this page: http://www.roseindia.net/hibernate/hibernate4/firstHibernateApplication.shtml
Although, in eclipse it worked fine, I've got a problem with Intellij IDEA. Specifically, I have an error in the hibernate.cfg.xml file which says:
" 'com.mysql.jdbc.Driver' is not assignable to 'java.sql.Driver' ".
And when I run the program a message appears saying:
"ERROR: No suitable driver found for jdbc:mysql://127.0.0.1:3306/person Inserting Record Could not open connection"
('person' is my database) I have added the necessary jar files (or at least I think so) and generally I have followed all the steps from the webpage I pasted in the second line of this message. Please look at it and help me if you can. All the files and code I've created can be seen from the website I pasted. I've almost copied-pasted the example. Thank you.
UPDATED
hibernate.cfg.xml:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"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://127.0.0.1:3306/person
</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password"/>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
</session-factory>
</hibernate-configuration>
I' ve placed the connector jar file at the directory IdeaProjects\coreHibernateExample\lib. No, I am not running Tomcat, I guess I am running through Intellij. The import of the Mysql database has been made through Wampservers' phpmyadmin.

You have to make the JDBC library jar available to your project. Just adding jar to your project directory does not accomplish that.
Select jar in your project, right click and add as a library.

Cannot resolve class dialect

I am trying to fix an issue for hours but nothing seems to work.I tried everything available online. I am using Intellij IDEA. I am using a Maven project. I have created hibernate.cfg.xml with following content
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">org.h2.Driver</property>
<property name="connection.url">jdbc:h2:mem:test;DB_CLOSE_DELAY=-1</property>
<property name="dialect">org.hibernate.dialect.H2Dialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">create</property>
<mapping class="User"/>
</session-factory>
</hibernate-configuration>
Following line is throwing an error that cannot resolve class dialect
<property name="dialect">org.hibernate.dialect.H2Dialect</property>
My External Libraries structure looks like this.
any help would be appreciated.

I fixed the problem. The problem was Intellij IDEA was not able to download maven files for Hibernate. I used maven repository for adding the repository.

Duplicate Bean Error while connecting to two different DBs using Hibernate despite implementing both the beans [duplicate]

I am new bee to Hibernate and trying out things.
One thing that seems to amuse all is how to connect to different databases?
I have two questions here:
If in the same web app I need to connect to MySQL and Oracle, how do I do it?
I am using MySQL and have two databases test1 and test2, how to connect and retrieve data?
I have read in a blog that we can create different configuration files and do it.
I tried it but was not sucessful.
Here's what I tried:
SessionFactory sf = (SessionFactory) new Configuration().configure(path);
Where path is the path of the config file.
Is this the right way?

Using annotation mappings as an example:
Configuration cfg1 = new AnnotationConfiguration();
cfg1.configure("/hibernate-oracle.cfg.xml");
cfg1.addAnnotatedClass(SomeClass.class); // mapped classes
cfg1.addAnnotatedClass(SomeOtherClass.class);
SessionFactory sf1 = cfg1.buildSessionFactory();
Configuration cfg2 = new AnnotationConfiguration();
cfg2.configure("/hibernate-mysql.cfg.xml");
cfg2.addAnnotatedClass(SomeClass.class); // could be the same or different than above
cfg2.addAnnotatedClass(SomeOtherClass.class);
SessionFactory sf2 = cfg2.buildSessionFactory();
Then use sf1 and sf2 to get the sessions for each database. For mapping files, you just use cfg.addClass instead of addAnnotatedClass. Put the cfg.xml files in the root package in this case. Those will have the Oracle or MySQL dialect and connection information.

It cannot be done using one hibernate configuration file. You need to have two configurations files for it.
To configure mysql database
hibernate-mysql.cfg.xml
To configure oracle database
hibernate-oracle.cfg.xml
In Details, mysql configuration file be like this.
<?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.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">PASSWORD</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/UR_DB_NAME</property>
<property name="hibernate.connection.username">USERNAME</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<mapping class="domain.EmployeeMysql"></mapping>
</session-factory>
</hibernate-configuration>
In Details, oracle configuration file be like this.
<?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.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.password">PASSWORD</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:UR DB NAME</property>
<property name="hibernate.connection.username">USERNAME</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="show_sql">true</property>
<mapping class="domain.EmployeeOracleSql"></mapping>
</session-factory>
</hibernate-configuration>
And code should be like this.
mysql configuration
private static SessionFactory sessionAnnotationFactory;
sessionAnnotationFactory = new Configuration().configure("hibernate-mysql.cfg.xml").buildSessionFactory();
Session session = sessionAnnotationFactory.openSession();
oracle sql configuration
sessionAnnotationFactory = new Configuration().configure("hibernate-oracle.cfg.xml").buildSessionFactory();
Session session = sessionAnnotationFactory.openSession()

Ideally you should move to Distributed transaction type of system[using Java Transaction Analyzer org.hibernate.transaction.JTATransactionFactory] in this case. If you are running in JBoss App Server, you can do it by using "Distributed Transaction Managers". You can learn more about it here.

You can also use a catalog with the value of the other database
#Table(name = "foo", schema = "bar", catalog = "OtherDatabase")

You can also Add mapping class in configuration.xml file
Note : this is for annotations and for resources use resources keyword instead of class
<mapping class="packageName.classNmae1"/>
<mapping class="packageName.classNmae2"/>

You can connect two databases test1 and test2, retrieve data with only one hibernate with some tricks:
hibernate SQLQuery: just add database name with the table "select * from test1.table1", "select * from test2.table2"
hibernate persistence: using the key schema in the hibernate mapping xml
<class name="Table1Class" table="table1" schema="test1">
<class name="Table2Class" table="table2" schema="test2">

Netbeans 7.1 Hibernate Reverse Engineering wizard does not find database driver

I am currently trying to get through this netbeans + hibernate + JavaSE tutorial ( http://netbeans.org/kb/docs/java/hibernate-java-se.html). All is pretty fine, but after the creation of the hibernate.cfg.xml when it comes to the part where reverse engineering should be applied it comes to some weird message that the reverse-engineering wizard tells me:
"The database drivers are not added to the project classpath."
"Go to project properties to add database library.".
Well that's kind of weird, because the hibernate.cfg.xml was generated by netbeans. I've checked my database connection with the connection data from the hibernate.cfg.xml and it seems to be all okay, so connecting manually works pretty fine. Anyone knows what is going on here? Am I doing something wrong?
<?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://localhost:3306/sakila</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">apassword</property>
<property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property>
</session-factory>
</hibernate-configuration>

Add these line of code in hibernate.cfg.xml
<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://localhost/DATABASE_NAME</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password"/>
</session-factory>

Besides missing jar files, here is another possible way that could cause this error in netbeans: wrong configuration file.
So make sure you have the correct configuration file (.cfg.xml file) to build .reveng

Attached an example configuration:
<?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.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">1234</property>
<property name="hibernate.connection.url">jdbc:mysql://161.58.103.144:3306/exampleDatabase?zeroDateTimeBehavior=convertToNull</property>
<property name="hibernate.connection.username">JasonGlez</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
</session-factory>
</hibernate-configuration>
Just change the ip, the name of the database, your username and password

You are missing the JDBC Driver. At the Project View right click the Libraries node under your project and choose Add Library... -> MySQL JDBC Driver.

As mentioned by hello, make sure the hibernate.cfg.xml is good. Try regenerating it though from Netbeans Hibernate Configuration Wizard as opposed to crafting it yourself. Also try recreating the project and make sure the new project wizard populates the hibernate.cfg.xml with database connection settings. It came out blank for me the first time; not sure why. Before it started working, I had also restarted Netbeans and the computer to boot, which might not hurt to try. (No pun intended.)

This required MySQL driver, Add My sql Driver in Library to resolve the issue

Derby database don't save entity after application running

I'm using Embedded Derby DB with hibernate. I'm saving some entities to database. After shutting down the application there is no entities in DB. Why it could be so?
Below my Hibernate configuration
<?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="show_sql">true</property>
<property name="format_sql">true</property>
<property name="dialect">org.hibernate.dialect.DerbyDialect</property>
<property name="connection.driver_class">org.apache.derby.jdbc.EmbeddedDriver</property>
<property name="connection.url">jdbc:derby:\bases\localbase;create=true</property>
<property name="connection.username"></property>
<property name="connection.password"></property>
<property name="hibernate.hbm2ddl.auto">validate</property>
<mapping class="com.example.model.HistoryItem"/>
<mapping class="com.example.model.User"/>
<mapping class="com.example.model.BaseAbstractEntity"/>
</session-factory>
</hibernate-configuration>

This is weird because Derby sync to the disk after each commit by default (unless you set the property derby.system.durability=test). And your url looks correct (although I would use forward slashes).
This begs the question: how do you managed transactions? Are you sure that you are committing them?

Derby likes to hang on to the data - ie keep it in memory. If you try shutting it down by trying something like:
DriverManager.getConnection("jdbc:derby:;shutdown=true");
This should make sure the data is flushed to the disk and derby is shut down cleanly.
At the moment I am trying to get Hibernate 3.6 to do this for me - no luck so far.

Perhaps you are looking in the wrong place. Perhaps the Hibernate application is creating a Derby database in one location on your hard disk, but when you look for the database contents later, you are looking in a different location on your hard disk. Since your Derby URL says "create=true", Derby will quietly create a new empty database for you if you don't get exactly the same location specification as in your original app.