我配置的ant，build.xml文件用于导入到EJB ，出了问题

当我配置了Spring 以后，这些配置就不起作用了，deploy时报错：

Caused by: java.lang.RuntimeException: java.lang.RuntimeException: Illegal @PersistenceUnit on protected javax.persistence.EntityManager com.ejb3.base.EntityManagerDao.em :There is no default persistence unit in this deployment.
at org.jboss.ejb3.deployers.EJBStage2Deployer.deploy(EJBStage2Deployer.java:57)
at org.jboss.ejb3.deployers.EJBStage2Deployer.deploy(EJBStage2Deployer.java:37)
at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:65)
at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:169)
... 22 more

<?xml version="1.0" encoding="UTF-8"?>
<project name="Ejb3.0Test" basedir=".">
 <property name="src.dir" value="${basedir}/src" />
 <property environment="env"  />
 <property name="jboss.home" value="${env.JBOSS_HOME}" />
 <property name="jboss.server.config" value="${jboss.home}/server/default" />
 <property name="jboss.server.deploy" value="${jboss.server.config}/deploy" />
 <property name="build.dir" value="${basedir}/build" />
 
   <path id="build.classpath">
    <fileset dir="${jboss.home}/client">
     <include name="*.jar" />
    </fileset>
    <pathelement location="${build.dir}" />
   </path>
   
   <target name="prepare">
     <delete dir="${build.dir}" />
     <mkdir dir="${build.dir}" />
    </target>
    
   <target name="compile" depends="prepare" description="编译">
     <javac srcdir="${src.dir}" destdir="${build.dir}">
      <classpath refid="build.classpath" />
     </javac>
    </target>
    
    <target name="ejbjar" depends="compile" description="创建Ejb发布包">
     <jar jarfile="${basedir}/${ant.project.name}.jar">
      <fileset dir="${build.dir}">
       <include name="**/*.class" />
      </fileset>
     </jar>
    </target>
    
    <target name="deploy" depends="ejbjar" description="发布Ejb">
     <copy file="${basedir}/${ant.project.name}.jar" todir="${jboss.server.deploy}" />
    </target>
    
    <target name="undeploy" description="卸载Ejb">
     <delete file="${jboss.home}/server/${jboss.server.config}/deploy" />
    </target>
</project>

同时我还配置了persistence.xml文件和EntityManager
请教高手们怎么修改build.xml文件能正常将Ejb3.0组件部署成功