Hibernate Learning Notes

Hibenate Development process:

1: Add the relevant jar package;

2:src added Hibernate.cfg.xml (the contents of the document are as follows);

1 <?XML version= ' 1.0 ' encoding= ' UTF-8 '?>2 <!DOCTYPE hibernate-configuration Public3 "-//hibernate/hibernate Configuration DTD 3.0//en"4 "Http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">5 6 <!--Generated by MyEclipse Hibernate Tools.  -7 <hibernate-configuration>8 9     <session-factory>Ten     <!--dialect developing a database dialect (different SQL for different databases) One Oracle Org.hibenate.dialect.Oracle9Dialect A MYSQL Org.hibenate.dialect.MySQLDialect - SQL Server Org.hibenate.dialect.SQLServerDialect -      the       - -         < Propertyname= "dialect"> - Org.hibernate.dialect.MySQLDialect -         </ Property> +          -     <!--Specify the URL of the linked database - +         < Propertyname= "Connection.url"> A Jdbc:mysql://localhost:3306/testhib at         </ Property> -     <!--user name and password for the linked library - -          -         < Propertyname= "Connection.username">Root</ Property> -         < Propertyname= "Connection.password">Root</ Property> -          in     <!--Specifies the JDBC driver class for the database - -         < Propertyname= "Connection.driver_class"> to Com.mysql.jdbc.Driver +         </ Property> -  the          *     <!--the values of the HBM2DDL are: $ Create-drop: Run-time creation, finish running DeletePanax Notoginseng Create: Each run will be removed from the existing, created. When testing, use the Create - Update: Map files and tables. Only the data in the table will be updated the Validate: View Map file and table is not corresponding, if not corresponding, will error +          A      - the         < Propertyname= "Hbm2ddl.auto">Update</ Property> +          -     <!--show_sql hibenate Output A statement as a log - $         < Propertyname= "Show_sql">True</ Property> $      -     <!--mapping relation of the object to be sued - -         <MappingResource= "User.hbm.xml" /> the  -     </session-factory>Wuyi  the </hibernate-configuration>

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3: Add Pojo and corresponding mapping files;

4: Add log4j configuration (optional, set debug information and print level);

5: Development Program.

A:uibutil

1 Importorg.hibernate.Session;2 Importorg.hibernate.SessionFactory;3 Importorg.hibernate.cfg.Configuration;4 5 6  Public classHibutil {7     Private StaticSessionfactory Factory;8     9     PrivateHibutil () {Ten          One     } A      -     Static { -Configuration Configuration =NewConfiguration (); the         //configuration.configure ("Hibernate.cfg.xml"); - configuration.configure (); -Factory =configuration.buildsessionfactory (); -          +  -     } +      A      Public Staticsessionfactory getfactory () { at         returnFactory; -     } -      -      Public StaticSession getsession () { -         returnfactory.opensession (); -     } in}

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B:test.java

1 Importjava.util.Date;2 3 Importorg.hibernate.Session;4 Importorg.hibernate.SessionFactory;5 Importorg.hibernate.Transaction;6 Importorg.hibernate.cfg.Configuration;7 8 9  Public classTest {Ten  One     /** A      * @paramargs -      */ -      Public Static voidMain (string[] args) { the         //TODO auto-generated Method Stub -         /* - Configuration conf = new configuration (). Configure (); - Sessionfactory factory = Conf.buildsessionfactory (); + Session session = Factory.opensession (); - Transaction Transaction = session.begintransaction (); + User user = new User ("Xiao", New Date ()); A session.save (user); at transaction.commit (); - session.close (); -         */ -          -Session session =NULL; -Transaction tx =NULL; in         Try{ -Session =hibutil.getsession (); totx =session.begintransaction (); +User U = (user) session.get (user).class, 5);//Get Object -U.setname ("Xi Big");//Modifying Properties the             //session.delete (u); Delete Object *Session.update (U);//Write to Database $ Tx.commit (); Panax Notoginseng}finally{ -             if(Session! =NULL){ the session.close (); +             } A         } the     } +      -  $}

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