JPA配置文件

约定不等于承诺〃 2022-05-20 07:26 80阅读 0赞

**配置文件的文件名是固定的，创建JPA项目会自动生成配置文件。**

JPA 规范要求在类路径的 META-INF 目录下放置persistence.xml

下面具体配置的意义：

<?xml version="1.0" encoding="UTF-8"?>
    <persistence version="2.1"
    	xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    		
    	<persistence-unit name="jpa-1" transaction-type="RESOURCE_LOCAL">
    	
    		
    		<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    		
    		<class>com.jpa.helloworld.Customer</class>
    		
    		<properties>
    			
    			<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
    			<property name="javax.persistence.jdbc.url"	value="jdbc:mysql://localhost:3306/xxx?useUnicode=true&haracterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai" />
    			<property name="javax.persistence.jdbc.user" value="xxx" />
    			<property name="javax.persistence.jdbc.password" value="xxx" />
    			
    			<property name="hibernate.hbm2ddl.auto" value="update"/>
    			<property name="hibernate.show_sql" value="true"/>
    			<property name="hibernate.format_sql" value="true"/>
    		</properties>
    	</persistence-unit>
    </persistence>