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

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 6.0lib下加入oracle驱动包ojdbc14_g-10.2.0.1.0.jar

2、在Tomcat 6.0conf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>