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<?xml version="1.0" encoding="UTF-8"?>
<datasources>
  <local-tx-datasource>
    <jndi-name>MySqlDS</jndi-name>
    <connection-url>jdbc:mysql://localhost:3306/mydatabase?useUnicode=true&amp;characterEncoding=GBK</connection-url>
    <driver-class>com.mysql.jdbc.Driver</driver-class>
    <user-name>root</user-name>
    <password>123</password>
    <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
    <metadata>
       <type-mapping>mySQL</type-mapping>
    </metadata>
  </local-tx-datasource>
</datasources>
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2¡¢È»ºóн¨Ò»¸öEJB¹¤³Ì£¬ÔÚMETA-INFÎļþ¼ÐÏÂÌí¼ÓÎļþpersistence.xml¡£
<?xml version="1.0" encoding="UTF-8"?>
<persistence>
 <persistence-unit name="mydatabase">
  <jta-data-source>java:/MySqlDS</jta-data-source>
  <properties>
   <property name="hibernate.hbm2ddl.auto" value="update" />
  </properties>
 </persistence-unit>
</persistence>
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