关于JPA多数据源的部署persistence.xml文件配置以及对应实现类注入

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<?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="frameworkEjb" transaction-type="JTA">

<jta-data-source>frameworkDs</jta-data-source>

</persistence-unit>

<persistence-unit name="scada" transaction-type="JTA">

<jta-data-source>scada</jta-data-source>

</persistence-unit>

</persistence>

上图是persistence.xml中的配置文件其中frameworkEjb和scada是Weblogic发布的两个数据源的名称，当在实现类中要用某个数据源的时候就加入一下语句

@PersistenceContext(unitName="frameworkEjb")