tomcat下jndi配置成功为什么找不到数据源？

apache-tomcat-6.0.20，配置方式tomcat/conf/server.xml和context.xml中都配过，

<Resource name="mydataSource" auth="Container" type="javax.sql.DataSource"
        username="test"
  password="test"
  driverClassName="oracle.jdbc.driver.OracleDriver"
  url="jdbc:oracle:thin:@localhost:1521:orcl"
                           initialSize="5"
                           maxActive="10"
                           maxIdle="5"
                           minIdle="2"
                           maxWait="10000"
                           removeAbandoned="true"
                           logAbandoned="true"
                           removeAbandonedTimeout="60"
                           timeBetweenEvictionRunsMillis="900000"
                           minEvictableIdleTimeMillis="1800000"
                           numTestsPerEvictionRun="100"
                           validationQuery="select count(0) from dual"
                           poolPreparedStatements="true"
                           maxOpenPreparedStatements="100"/>

spring里面配置的数据源

<bean id="dataSource1"
  class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="test" />
  <property name="lookupOnStartup" value="true" />
 </bean>

始终找不到test这个源。网上看了很多博客都是这样千篇一律的，tomcat的文档也看过，配了还是没对。

请配过的师兄指点一二