Shulou(Shulou.com)06/01 Report--

The Hibernate framework development step project imports the required jar packages:

Http://pan.baidu.com/s/1eRQ19C2

Write hibernate.cfg.xml files

DOCTYPE hibernate-configuration PUBLIC

"- / / Hibernate/Hibernate Configuration DTD3.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

Jdbc:mysql://127.0.0.1:3306/test

Root

123456

Com.mysql.jdbc.Driver

Org.hibernate.dialect.MySQLDialect

True

True

Update

Write entity classes, create tables

Eg:

Package com.edu.bean

Public class User {

Private intid

Private String username

Private String password

Public intgetId () {

Return id

}

Public voidsetId (int id) {

This.id = id

}

Public String getUsername () {

Return username

}

Public voidsetUsername (String username) {

This.username= username

}

Public String getPassword () {

Return password

}

Public voidsetPassword (String password) {

This.password= password

}

Public User (Stringusername, String password) {

Super ()

This.username= username

This.password= password

}

Public User () {

/ / TODO Auto-generated constructor stub

}

}

Write a mapping file

Eg:

DOCTYPE hibernate-mapping PUBLIC "- / / Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

Put the mapping file into hibernate.cfg.xml

Write code:

Eg:

Package com.edu.test

Import org.hibernate.Session

Import org.hibernate.SessionFactory

Import org.hibernate.Transaction

Import org.hibernate.cfg.Configuration

Import org.junit.Test

Import com.edu.bean.User

Public class HibernateTest {

@ Test

Public voidtest () {

/ / read the hibernate.cfg.xml main configuration file

Configurationcfg=new Configuration () .configure (hibernate.cfg.xml)

/ / create a SessionFactory factory

SessionFactorysf=cfg.buildSessionFactory ()

/ / obtain session

Sessionsession=sf.openSession ()

/ / create a transaction

Transactiontc=session.beginTransaction ()

/ / create a User object

Useruser=new User (Zhang San, 123456)

/ / persist object

Try {

/ / Save data

Session.save (user)

/ / commit transaction (indispensable)

Tc.commit ()

} catch (Exception e) {

/ / data operation failed, rollback transaction

Tc.rollback ()

}

/ / close session

Session.close ()

}

}

Code layering optimization: get the HibernateGetSession class of Session:

Package com.edu.dbconn

Import org.hibernate.Session

Import org.hibernate.SessionFactory

Import org.hibernate.cfg.Configuration

Public class HibernateGetSession {

/ / make sure that the SessionFactory factory is created only once

Private staticSessionFactory sf

Static {

If (sf==null) {

/ / read the hibernate.cfg.xml main configuration file

Configurationcfg=new Configuration () .configure (hibernate.cfg.xml)

/ / create a SessionFactory factory

Sf=cfg.buildSessionFactory ()

}

}

Public staticSession getSession () {

/ / create a session

Sessionsession=sf.openSession ()

Return session

}

}

The UserDao class of the Dao layer:

Package com.edu.dao

Import org.hibernate.Session

Import org.hibernate.Transaction

Import com.edu.bean.User

Import com.edu.dbconn.HibernateGetSession

Public class UserDao {

Public voidsaveUser () {

/ / obtain session

Sessionsession=HibernateGetSession.getSession ()

/ / create a transaction

Transactiontc=session.beginTransaction ()

/ / create a User object

Useruser=new User ("Li Si", "123456")

/ / persist object

Try {

/ / Save data

Session.save (user)

/ / commit transaction (indispensable)

Tc.commit ()

} catch (Exception e) {

/ / data operation failed, rollback transaction

Tc.rollback ()

}

/ / close session

Session.close ()

}

}

Test layer:

Package com.edu.test

Import org.junit.Test

Import com.edu.dao.UserDao

Public class HibernateTest {

@ Test

Public voidtest () {

UserDaoud=new UserDao ()

Ud.saveUser ()

}

}

Instance source code:

Http://pan.baidu.com/s/1eRPLFJO

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