JPA的配置文件

JPA规范要求在类路径的META-INF目录下放置persistence.xml,文件的名称是固定的,配置模板如下:


<?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="jpa1" transaction-type="RESOURCE_LOCAL">      
    <class>org.hibernate.ejb.HibernatePersistence</class>      
    <properties>      
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>      
        <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>      
        <property name="hibernate.connection.username" value="root"/>      
        <property name="hibernate.connection.password" value="xxx"/>      
        <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/jpademo"/>      
        <property name="hibernate.hbm2ddl.auto" value="update"/>      
        <property name="hibernate.show_sql" value="true"/>      
    </properties>      
</persistence-unit>      
</persistence>    

  

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