Java 此持久性单元配置有什么问题？

我试图在JBossAS6上的JEE6中设置一个持久化单元

注入的EntityManager始终为空。我在配置上花了不少功夫，但什么都没用。我尝试过JTA/LOCAL_RESOURCE，我尝试过在代码中使用与persistence.xml相同的单元名称，但也使用了前面的war名称，正如日志所示，JNDI名称可能就是这样

我有一个mysql-ds.xml文件，如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<datasources>
  <local-tx-datasource>

    <jndi-name>myconnection</jndi-name>
    <connection-url>jdbc:mysql://localhost:3306/cog1</connection-url>
    <driver-class>org.gjt.mm.mysql.Driver</driver-class>
    <user-name>bw</user-name>
    <password></password>

    <min-pool-size>2</min-pool-size>
    <max-pool-size>20</max-pool-size>
    <idle-timeout-minutes>5</idle-timeout-minutes>

    <exception-sorter-class-name>com.mysql.jdbc.integration.jboss.ExtendedMysqlExceptionSorter</exception-sorter-class-name>
    <valid-connection-checker-class-name>com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker</valid-connection-checker-class-name>

  </local-tx-datasource>
</datasources>

<?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="myunit" transaction-type="RESOURCE_LOCAL">
            <jta-data-source>java:/myconnection</jta-data-source>
            <non-jta-data-source>java:/myconnection</non-jta-data-source>
            <class>com.cognitura.simulation.dao.model.History</class>
            <properties>
                    <property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
                    <property name="eclipselink.logging.level" value="INFO" />
            </properties>
    </persistence-unit>
</persistence>

我可以看到RealityElement el被注入的很好，所以我认为它肯定是由容器管理的

谢谢你的建议

编辑：日志似乎适合设置“myunit”单元。有一个警告，但我读到它并不重要

01:28:06,276 INFO  [org.jboss.jpa.deployment.PersistenceUnitDeployment] Starting persistence unit persistence.unit:unitN
ame=cog1.war#myunit
01:28:06,278 INFO  [org.hibernate.ejb.Ejb3Configuration] Processing PersistenceUnitInfo [
    name: myunit
    ...]
01:28:06,305 WARN  [org.hibernate.ejb.Ejb3Configuration] Persistence provider caller does not implement the EJB3 spec co
rrectly.PersistenceUnitInfo.getNewTempClassLoader() is null.

这里似乎很开心：

01:28:06,965 INFO  [org.hibernate.impl.SessionFactoryObjectFactory] Bound factory to JNDI name: persistence.unit:unitNam
e=cog1.war#myunit

---

可能是jndi的名字吗？尝试在数据源和持久性文件中进行以下更改

<jndi-name>java:jboss/datasources/employeedb</jndi-name>

<jta-data-source>java:jboss/datasources/employeedb</jta-data-source>

<jndi-name>java:jboss/datasources/employeedb</jndi-name>

<jta-data-source>java:jboss/datasources/employeedb</jta-data-source>