Hibernate Learning 2_ Simple Hibernate implementation

In this paper, Java Engineering +hibernate Simple implementation of a Hibernate persisted Java object to MySQL database function.

1. Project configuration

2. Database connection configuration file Hibernate.cfg.xml

<?XML version= "1.0"?><!DOCTYPE hibernate-mapping Public "-//hibernate/hibernate mapping DTD 3.0//en" "http://www.hibernate.org/ Dtd/hibernate-mapping-3.0.dtd "><hibernate-mapping Package= "Com.djl.test">    <classname= "Student"Table= "Student">      <IDname= "id"column= "ID">      </ID>      < Propertyname= "Name"column= "Name"type= "string"/>      < Propertyname= "Age"column= "Age"type= "integer"/>    </class></hibernate-mapping>

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3. New Java Entity Student.java

 Packagecom.djl.test; Public classStudent {Private intID;  Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }    PrivateString name; Private intAge ;  PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     Public intGetage () {returnAge ; }     Public voidSetage (intAge ) {         This. Age =Age ; }    }

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4. Establish the mapping relationship between entity and database Student.hbm.xml

<?XML version= "1.0"?><!DOCTYPE hibernate-mapping Public "-//hibernate/hibernate mapping DTD 3.0//en" "http://www.hibernate.org /dtd/hibernate-mapping-3.0.dtd "><hibernate-mapping Package= "Com.djl.test">    <classname= "Student"Table= "Student">      <IDname= "id"column= "ID">      </ID>      < Propertyname= "Name"column= "Name"type= "string"/>      < Propertyname= "Age"column= "Age"type= "integer"/>    </class></hibernate-mapping>

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5, simple test program to call

 Packagecom.djl.test;Importorg.hibernate.Session;Importorg.hibernate.SessionFactory;Importorg.hibernate.cfg.Configuration; Public classMaintest { Public Static voidMain (String ... args) {Student stu=NewStudent (); Stu.setid (0); Stu.setage (20); Stu.setname ("Wangshan"); Configuration Config=NewConfiguration ();        Config.configure (); Sessionfactory Factory=config.buildsessionfactory (); Session Session=factory.opensession ();         Session.begintransaction ();        Session.save (Stu);        Session.gettransaction (). commit ();        Session.close ();            Factory.close (); }}

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Hibernate Learning 2_ Simple Hibernate implementation