异常：Caused by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'--解决方法

最近在搞oracle，遇到配置应用时出现：

Caused by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'

 

困扰了好久，排除了数据库包的问题，排除了程序本身的问题，仔细查看数据库连接字符串等信息也没问题，最后只能规规矩矩的按照如下方法解决之：

 

step1：

    将oracle的数据库连接包class12.jar放在tomcat的lib下；

 

step2:

 

    配置service.xml:

 <GlobalNamingResources> <!-- Editable user database that can also be used by UserDatabaseRealm to authenticate users --> <Resource name="UserDatabase" auth="Container" type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" pathname="conf/tomcat-users.xml" /> <Context path="/b…………s" docBase="D:……………………………………/WebRoot" debug="5" reloadable="true" crossContext="true"> <Logger className="org.apache.catalina.logger.FileLogger"prefix="localhost_MyHeerrsTest_log." suffix=".txt" timestamp="true" /> <Resource name="jdbc/oracleDS" auth="Container"type="javax.sql.DataSource"factory="org.apache.commons.dbcp.BasicDataSourceFactory"maxActive="100" maxIdle="30" maxWait="5000" username="XXXX_dev"password="XXX" driverClassName="oracle.jdbc.driver.OracleDriver"url="jdbc:oracle:thin:@localhost:1521:XXXX" /> </Context> </GlobalNamingResources> <DefaultContext> <ResourceLink global="jdbc/oracleDS" name="jdbc/oracleDS" type="javax.sql.DataSource" /> </DefaultContext>

 

 

step3:

 配置web.xml:加入：

<resource-ref> <!--liuz change--> <description>DB Connection</description> <res-ref-name>jdbc/oracleDS</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref>

 

step4:

在Tomcat6.0/conf/Catalina/localhost下添加应用配置文件，内容如下：

 

<Context path="/b……s" docBase="D:……………………/WebRoot" debug="5"reloadable="true" crossContext="true"> <Logger className="org.apache.catalina.logger.FileLogger"prefix="localhost_MyHeerrsTest_log." suffix=".txt" timestamp="true" /> <Resource name="jdbc/oracleDS" auth="Container"type="javax.sql.DataSource"factory="org.apache.commons.dbcp.BasicDataSourceFactory"maxActive="100" maxIdle="30" maxWait="5000" username="XXXX_dev"password="XX" driverClassName="oracle.jdbc.driver.OracleDriver"url="jdbc:oracle:thin:@localhost:1521:XXXX" /></Context>

 

注意这里的信息和service.xml里面保持一致！！（建议采用这种标签-属性方式，不宜采用标签-参数方法）

 

 

如此即可解决问题！！

哎！！！问题解决了终归是好样的！！！！