SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null' 解决办法

环境：tomcat6、jdk1.6、oracle10g、myeclipse8.6

当跑jndi项目时抛出：org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'异常

解决办法：

1、在Tomcat 6.0\lib下加入oracle驱动包ojdbc14_g-10.2.0.1.0.jar

2、在Tomcat 6.0\conf下的context.xml文件中加入

<Resource
	  name="jdbc/aaa_db"
	  type="javax.sql.DataSource"
	  username="test"
	  password="123456"
	  driverClassName="oracle.jdbc.driver.OracleDriver"
	  maxIdle="3"
	  maxWait="5000"
	  url="jdbc:oracle:thin:@192.168.30.99:1521:orcl"
	  maxActive="10"/>

3、检查项目中web.xml里面的配置是否和context.xml实例名一样

<resource-ref>
   <description>db connect</description>
   <res-ref-name>jdbc/aaa_db</res-ref-name>
   <res-type>javax.sql.DataSource</res-type>
   <res-auth>Container</res-auth>
</resource-ref>