Jpa仕様のpersistence.xmlプロファイル解析

spring data+hibernateを使って論理層操作を行う場合は配置が必要です。 persistence.xmlの内容
 

<?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="org.hibernate.dialect.MySQL5Dialect" />  

    <property name="hibernate.connection.driver_class" value="org.gjt.mm.mysqlDriver" />  

    <property name="hibernate.connection.username" value="root" />  

    <property name="hibernate.connection.password" value="root" />  

    <property name="hibernate.connection.url" value="jdbc.mysql://localhost:3306/testdatabase?useUnicode=true&characterEncoding=UTF-8" />  

    <property name="hibernate.max_fetch_depth" value="3" />  

    <property name="hibernate.show_sql" value="true" />  

    <property name="hibernate.hbm2ddl.auto" value="create-drop"/>  

   </properties>  

  

</persistence-unit>

 
 
以下はオンラインで検索してきたプロファイルの各行の説明です。
 

<?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               (name  ,     );   

     transaction-type       (  )    

-->  

<persistence-unit name="unitName" transaction-type="JTA">  

  

   <!--     .(  ) -->  

   <description> </description>  

  

   <!-- javax.persistence.PersistenceProvider        (  ) -->  

   <provider>   </provider>  

  

   <!-- Jta-data-source  non-jta-data-source               JTA / non-JTA      JNDI  (  ) -->  

   <jta-data-source>java:/MySqlDS</jta-data-source>  

   <non-jta-data-source> </non-jta-data-source>  

  

   <!--   orm.xml    .(  ) -->  

   <mapping-file>product.xml</mapping-file>  

  

   <!--    persistence.xml jar          ,     jar  .(  ) -->  

   <jar-file>../lib/model.jar</jar-file>  

  

   <!--        , Java SE          .(  ) -->  

   <class>com.domain.User</class>  

   <class>com.domain.Product</class>  

  

   <!--       jar      @Enity       .    ,   :(  ) -->  

   <exclude-unlisted-classes/>  

  

   <!--         (  )   -->  

   <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>