persistence.xml配置实例

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"

xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

<persistence-unit name="jpa.database" />

<properties>

<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />

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

<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />

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

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

<property name="hibernate.hbm2ddl.auto" value="update" />

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

</properties>

</persistence-unit>

<persistence-unit name="jpa.sample.plain">

<properties>

<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />

<property name="hibernate.connection.url" value="jdbc:h2:mem:database" />

<property name="hibernate.connection.driver_class" value="org.h2.Driver" />

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

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

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

</properties>

</persistence-unit>

</persistence>