<?xml version=”1.0″ encoding=”UTF-8″?>
<persistence version=”1.0″
xmlns:persistence=”http://java.sun.com/xml/ns/persistence“
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance“
xsi:schemaLocation=”http://java.sun.com/xml/ns/persistence persistence_1_0.xsd “>
<!–
Name属性用于定义持久化单元的名字 (name必选,空值也合法);
transaction-type 指定事务类型(可选)
–>
<persistence-unit name=”unitName” transaction-type=”JTA”>
<!– 描述信息.(可选) –>
<description> </description>
<!– javax.persistence.PersistenceProvider接口的一个实现类(可选) –>
<provider> </provider>
<!– Jta-data-source和 non-jta-data-source用于分别指定持久化提供商使用的JTA和/或non-JTA数据源的全局JNDI名称(可选) –>
<jta-data-source>java:/MySqlDS</jta-data-source>
<non-jta-data-source> </non-jta-data-source>
<!– 声明orm.xml所在位置.(可选) –>
<mapping-file>product.xml</mapping-file>
<!– 以包含persistence.xml的jar文件为基准的相对路径,添加额外的jar文件.(可选) –>
<jar-file>../lib/model.jar</jar-file>
<!– 显式列出实体类,在Java SE 环境中应该显式列出.(可选) –>
<class>com.domain.User</class>
<class>com.domain.Product</class>
<!– 声明是否扫描jar文件中标注了@Enity类加入到上下文.若不扫描,则如下:(可选) –>
<exclude-unlisted-classes/>
<!– 厂商专有属性(可选) –>
<properties>
<!– hibernate.hbm2ddl.auto= create-drop / create / update –>
<property name=”hibernate.hbm2ddl.auto” value=”update” />
<property name=”hibernate.show_sql” value=”true” />
</properties>
</persistence-unit>
</persistence>
persistence.xml
2008-02-13 21:42
<?xml version=”1.0″ encoding=”UTF-8″?>
<persistence xmlns=”
http://java.sun.com/xml/ns/persistence”
xmlns:xsi=”
http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation=”
http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd” version=”1.0″>
<!–
persistence-unit name=”EjbXmlMappingsPU” // 持久化单元名
transaction-type=”JTA(default)/RESOURCE_LOCAL” // 事务类型
–>
<persistence-unit name=”EjbXmlMappingsPU” transaction-type=”JTA”>
<description></description> <!– 描述 –>
<provider>oracle.toplink.essentials.PersistenceProvider</provider> <!– 指定一个持久化提供者 –>
<jta-data-source>jdbc/MyDataSource</jta-data-source> <!– 指定JTA数据源 –>
<non-jta-data-source>jdbc/NonTxMyDataSource</non-jta-data-source> <!– 指定非JTA数据源 –>
<mapping-file>META-INF/my_queries.xml</mapping-file> <!– 指定映射文件 –>
<mapping-file>META-INF/my_entities.xml</mapping-file>
<jar-file>my/my-classes.jar</jar-file> <!– 指定托管类的附加JAR –>
<class>myclass1</class> <!– 明确列出的类 –>
<class>myclass2</class>
<exclude-unlisted-classes/> <!– 使本地类不能被加到持久化单元中 –>
<properties> <!– 使用提供者属性 –>
<property name=”toplink.logging.level” value=”FINE”/>
<property name=”toplink.cache.size.dafault” value=”500″/>
</properties>
</persistence-unit>
</persistence>
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