spring jpa hibernate lazy 异常解决办法

<?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_2_0.xsd"
             version="2.0">
    <persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
         <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
       <non-jta-data-source>dataSource</non-jta-data-source>
        <properties>
         ...
        <property name="hibernate.enable_lazy_load_no_trans" value="true" />
         ...
    </properties>
   </persistence-unit>
 </persistence>