JavaMuse

<? xml?version = ' 1.0 ' ?encoding = ' utf-8 ' ?>
<! DOCTYPE?hibernate - configuration?PUBLIC
???????? " -//Hibernate/Hibernate?Configuration?DTD?3.0//EN "
???????? " http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd " >

< hibernate - configuration >

???? < session - factory >

???????? <!-- ?Database?connection?settings? -->
???????? < property?name = " connection.driver_class " > com.mysql.jdbc.Driver </ property >
???????? < property?name = " connection.url " > jdbc:mysql: // localhost:3306/eg</property>
???????? < property?name = " connection.username " > root </ property >
???????? < property?name = " connection.password " > 4864452 </ property >

???????? <!-- ?JDBC?connection?pool?(use?the?built - in)? -->
???????? < property?name = " connection.pool_size " > 1 </ property >

???????? <!-- ?SQL?dialect? -->
???????? < property?name = " dialect " > org.hibernate.dialect.MySQLInnoDBDialect </ property >

???????? <!-- ?Enable?Hibernate ' s?automatic?session?context?management?-->
???????? < property?name = " current_session_context_class " > thread </ property >

???????? <!-- ?Disable?the?second - level?cache?? -->
???????? < property?name = " cache.provider_class " > org.hibernate.cache.NoCacheProvider </ property >

???????? <!-- ?Echo?all?executed?SQL?to?stdout? -->
???????? < property?name = " show_sql " > true </ property >

???????? <!-- ?Drop?and?re - create?the?database?schema?on?startup?
???????? < property?name = " hbm2ddl.auto " > create </ property >
????????? -->
????
???????? < mapping?resource = " eg/Message.hbm.xml " />
????????
????????
???? </ session - factory >

</ hibernate - configuration >

package ?eg;

public ? class ?Message? {
???? private ?Long?id;
???? private ?String?text;
?????????????
???? private ?Message?nextMessage;

???? public ?Message()? {}
???? public ?Message(String?text) {
???????? this .text = text;
????}
????
???? public ? void ?setId(Long?id)? {
???????? this .id? = ?id;?
????}

???? public ? void ?setText(String?text)? {
???????? this .text? = ?text;?
????}

???? public ? void ?setNextMessage(Message?nextMessage)? {
???????? this .nextMessage? = ?nextMessage;?
????}
??????? public ?Long?getId()? {
???????? return ?( this .id);?
????}
??????? public ?String?getText()? {
???????? return ?( this .text);?
????}
??????? public ?Message?getNextMessage()? {
???????? return ?( this .nextMessage);?
????} ?
}

<? xml?version = " 1.0 " ?encoding = " utf-8 " ?>

<! DOCTYPE?hibernate - mapping?PUBLIC
???? " -//Hibernate/Hibernate?Mapping?DTD?3.0//EN " ?
???? " http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd " >

< hibernate - mapping >
???? < class
????????name =" eg.Message "
????????table = " MESSAGE "
???? >

???????? < id
????????????name = " id "
????????????column = " MESSAGE_ID "
????????????type = " java.lang.Long "
???????? >
???????????? < generator? class = " native " />
?????????????????????????
???????? </ id >
???????? < property
????????????name = " text "
????????????type = " java.lang.String "
????????????update = " true "
????????????insert = " true "
????????????column = " MESSAGE_TEXT "
???????? />

???????? < many - to - one
????????????name = " nextMessage "
???????????? class = " jmuse.eg.Message "
????????????cascade = " all "
????????????outer - join = " auto "
????????????update = " true "
????????????insert = " true "
????????????column = " NEXT_MESSAGE_ID "
???????? />

?????? </ class >

</ hibernate - mapping >

+ lib?
?????antlr.jar?
?????cglib.jar?
?????asm.jar?
?????asm - attrs.jars?
?????commons - collections.jar?
?????commons - logging.jar?
?????hibernate3.jar?
?????jta.jar?
?????dom4j.jar?
?????log4j.jar?
＋src?
???? + eg
???????Message.java
???????Message.hbm.xml
???????TestMessage.java
?????hibernate.cfg.ml
?????log4j.properties

?session.beginTransaction();
????????Message?m = new ?Message( " hello,world " );
????????session.save(m);
????????session.getTransaction().commit();
????????session.close();

我們剛才在數據庫中保存了一個Id為1的Message對象。
如果：
session.beginTraction();
Message?m = new ?Message();
m.setId( new ?Long( 1 ));
m.setText( " This?is?another?greeting " );
session.saveOrUpdate(m);
sesion.getTraction.commit();