- 1.首先需要配置服务器glassfish的数据库连接池，又叫资源连接池：
- 2.然后配置persistence unit：
-
整个Persistence unit的格式如下：
-配置实例：
-
<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="RealEstateAgencyPU" transaction-type="JTA">
<jta-data-source>jdbc/RealEstateDataSource</jta-data-source>
<class>fit5042.tutex.repository.entities.ContactPerson</class>
<class>fit5042.tutex.repository.entities.Property</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.schema-generation.database.action" value="create"/>
</properties>
</persistence-unit>
</persistence>
-
其中：
就是这条：
