Spring4 JDBC 通过JNDI获取数据源

Question

为什么 jndi的id属性一定要是dataSource，如果不是dataSource就报错

<jee:jndi-lookup id="dataSource" jndi-name="jdbc/ORCL" resource-ref="true"/>

  <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource" />
  </bean>

如果将JNDI的id属性设置为datasource，将会报错：
org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'helloWorld': Injection of autowired dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.it.dao.Seacher com.it.controller.HelloWorld.seacher;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'seacher' defined in class path resource [springmvc.xml]: Cannot resolve reference to bean 'jdbcTemplate' while setting bean property 'jdbcTemplate';
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jdbcTemplate' defined in class path resource [springmvc.xml]: Error setting property values;
nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'datasource' of bean class [org.springframework.jdbc.core.JdbcTemplate]: Bean property 'datasource' is not writable or has an invalid setter method. Did you mean 'dataSource'?