Hibernate Basic Configuration (scaffolding)

One. Hibernate configuration takes 4 steps

1. Configure the Hibernate.cfg.xml file, configure the basic database connection , and some other such as: dialect, Format_sql, Show_sql, Hbm2ddl.auto and so on.

2. Create the entity class.

3. Create a mapping file for the entity class, such as: if the entity class is News, then the Entity class mapping file is: News.hbm.xml.

4. Perform the test.

1. Configuring the Hibernate.cfg.xml File

<hibernate-configuration>    <session-factory>        <!--Configure basic information for HIBERNATE0 -        < Propertyname= "Hibernate.connection.username">Root</ Property>        < Propertyname= "Hibernate.connection.password">Root</ Property>        < Propertyname= "Hibernate.connection.driver_class">Com.mysql.jdbc.Driver</ Property>        < Propertyname= "Hibernate.connection.url">Jdbc:mysql:///test</ Property>                <!--Configuring HIBERNATE0 Additional information -<property name= "Hibernate.dialect" >org.hibernate.dialect.MySQL5InnoDBDialect</property>< Propertyname= "Hibernate.format_sql">True</ Property>        < Propertyname= "Hibernate.show_sql">True</ Property>        < Propertyname= "Hibernate.hbm2ddl.auto">Update</ Property>                <!--map to News.hbm.xml -        <MappingResource= "Org/blanck/entities/news.hbm.xml"/>    </session-factory></hibernate-configuration>

2. Create the Entity class:

 Public class News {        private  Integer ID;     Private String title;     Private Date Newstimes;}

Omit Get/set method
Omitted parameter/parameterless constructor

3. Configure the mapping file for the entity class (using the Eclipse hibernatetools-update-4.1.1.final plugin, you can generate the configuration file)

<hibernate-mapping>    <classname= "Org.blanck.entities.News"Table= "T_news">        <IDname= "id"type= "Java.lang.Integer">            <columnname= "ID" />                       <!--the generation strategy of the database -            <Generatorclass= "Native" />        </ID>        < Propertyname= "title"type= "Java.lang.String">            <columnname= "TITLE" />        </ Property>        < Propertyname= "Newstimes"type= "Java.util.Date">            <columnname= "Newstimes" />        </ Property>    </class></hibernate-mapping>

4. The following is the test class:

 Public classHibernatetest {//HIBERNATE0 3 interfaces, session factory, session, transaction    Privatesessionfactory sessionfactory; PrivateSession session; PrivateTransaction Transaction; /*** Before testing, Initialize method*/@Before Public voidinit () {System.out.println ("Initialize Method ..."); //1. Initialize the Configuration object to create the objects needed to build the SessionfactoryConfiguration Configuration =NewConfiguration (). Configure (); Serviceregistry Serviceregistry=NewServiceregistrybuilder (). Applysettings (Configuration.getproperties ()). Bui        Ldserviceregistry (); //2. Building Sessionfactory objects with ServiceregistrySessionfactory =configuration.buildsessionfactory (serviceregistry); //open a Session with sessionfactory, turn on the transactionSession =sessionfactory.opensession (); Transaction=session.begintransaction (); }        /*** Test complete, destroy object*/@After Public voiddestory () {System.out.println ("Destruction Method ..."); //COMMIT TRANSACTION, close Session, close sessionfactoryTransaction.commit ();        Session.close ();    Sessionfactory.close (); }        /*** Test Method*/@Test Public voidTest () {System.out.println ("Test Method"); //Create a News object to testNews news =NewNews ("Hellokitty",NewDate ());    Session.save (news); }}

5. Error, if it appears: You have a error in your SQL syntax;

Check the manual-corresponds to your MySQL server version for the right syntax-use-near ' type=innodb ' on line 6

Please put:

<name= "Hibernate.dialect"> Org.hibernate.dialect.MySQLInnoDBDialect</Property>

Modified to:

<name= "Hibernate.dialect"> Org.hibernate.dialect.MySQL5InnoDBDialect</Property>

This is primarily due to a database version issue, using

The mysql5innodbdialect can be applied to versions after MySQL 5.1.

If the database was originally present , the above error will not occur.

Hibernate Basic Configuration (scaffolding)