<?xml version="1.0"?>    <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/persistence_1_0.xsd" version="1.0">    <persistence-unit name="itcast" transaction-type="RESOURCE_LOCAL">       <properties>      <property name="hibernate.dialect" value="http://www.mamicode.com/org.hibernate.dialect.MySQL5Dialect" />      <property name="hibernate.connection.driver_class" value="http://www.mamicode.com/org.gjt.mm.mysqlDriver" />      <property name="hibernate.connection.username" value="http://www.mamicode.com/root" />      <property name="hibernate.connection.password" value="http://www.mamicode.com/root" />      <property name="hibernate.connection.url" value="http://www.mamicode.com/jdbc.mysql://localhost:3306/testdatabase?useUnicode=true&characterEncoding=UTF-8" />      <property name="hibernate.max_fetch_depth" value="http://www.mamicode.com/3" />      <property name="hibernate.show_sql" value="http://www.mamicode.com/true" />      <property name="hibernate.hbm2ddl.auto" value="http://www.mamicode.com/create-drop"/>     </properties>    </persistence-unit>

<?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="http://www.mamicode.com/update" />      <property name="hibernate.show_sql" value="http://www.mamicode.com/true" />     </properties>    </persistence-unit>    </persistence>