Hibernate ORM Framework-continuation of the first chapter: Hibernate additions and deletions (optimization of the first hibernate code)

A:. Project structure

Second, the Code

1) hibernateutil

 Packageutil;Importorg.hibernate.SessionFactory;Importorg.hibernate.boot.MetadataSources;ImportOrg.hibernate.boot.registry.StandardServiceRegistry;ImportOrg.hibernate.boot.registry.StandardServiceRegistryBuilder; Public classHibernateutil {Private Staticsessionfactory SF; Static{Standardserviceregistry Registry=Newstandardserviceregistrybuilder (). Configure ()//The experimental method gives a parameter to see if the config file name is not hibernate.cfg.xml. Build (); SF=Newmetadatasources (registry). Buildmetadata (). Buildsessionfactory (); }         Public Staticsessionfactory getsessionfactory () {returnSF; }}

2) configuration file Hibernate.cfg.xml

<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE hibernate-Configuration Public"-//hibernate/hibernate Configuration DTD 3.0//en" "Http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd" & gt;true</property> <property name= "Format_sql" >true</property> <mapping resource= "Entity/studentmapping.xml"/> </session-factory>
3.1) Entity Object
 Packageentity; Public classStudent {PrivateString Sno; PrivateString sname;  PublicString Getsno () {returnSno; }     Public voidSetsno (String Sno) { This. Sno =Sno; }     PublicString Getsname () {returnsname; }     Public voidsetsname (String sname) { This. sname =sname; }    }
3.2) Entity mapping file
<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE hibernate-Mapping        Public "-//hibernate/hibernate mapping DTD 3.0//en" Package        = " Entity >    <class name= "Student" table= "Students" >        <id name= "sno" column= "id" >            class= "Assigned" ></generator>        </id>        <property name= "Sname" ></property >    </class>    
4) Dao method
 PackageDAO;Importjava.util.List;Importorg.hibernate.Session;Importorg.hibernate.SessionFactory;Importorg.hibernate.Transaction;Importentity. Student;Importutil. Hibernateutil; Public classStudentdao {Privatesessionfactory SF;  PublicStudentdao () {SF=hibernateutil.getsessionfactory (); }        /*Add*/     Public voidInsert (Student stu) {Session s=sf.opensession (); Transaction TS=s.begintransaction (); /*Add*/S.save (STU);        Ts.commit ();    S.close (); }        /*Modify*/     Public voidudate (Student Stu) {Session s=sf.opensession (); Transaction TS=s.begintransaction (); /*Modify*/S.update (STU);        Ts.commit ();       S.close (); }        /*Delete*/     Public voidDelete (String Sno) {Session session=sf.opensession (); Transaction TX=session.begintransaction (); Student Stu= Session.get (Student.class, Sno); /*Delete*/Session.delete (STU);        Tx.commit ();    Session.close (); }        /*Enquiry*/     PublicList<student>GetAll () {Session s=sf.opensession (); String hql= "From Student"; /*Enquiry*/List<Student> list =s.createquery (HQL). List ();        S.close (); returnlist; }        }
5) Test Testing
 Packagetest;ImportDAO. Studentdao;Importentity. Student; Public classMain { Public Static voidMain (string[] args) {Studentdao dao=NewStudentdao (); /*Add*/Student Stu=NewStudent (); Stu.setsno ("22"); Stu.setsname ("Z22");                Dao.insert (Stu); /*Modify*/        /*Student stu = new Student ();        Stu.setsno ("11");        Stu.setsname ("2222222"); Dao.udate (Stu);*/                /*Enquiry*/        /*list<student> List = Dao.getall ();        for (Student s:list) {System.out.println (S.getsname ()); }*/                /*Delete*/        /*Dao.delete ("a");*/    }}
* * Above personal packing notes, if wrong or do not understand the place, welcome comments and points * *
Hibernate ORM Framework-continuation of the first chapter: Hibernate additions and deletions (optimization of the first hibernate code)