请高手帮帮菜鸟(关于tomcat下mysql连接池配置)

Question

小弟今天尝试着配置连接池,配置如下:
server.xml
<Resource auth="Container" name="testMysql" type="javax.sql.DataSource"/>
<ResourceParams name="testMysql">
      <parameter>
        <name>maxWait</name>
        <value>5000</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>4</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value>aoyys</value>
      </parameter>
      <parameter>
        <name>url</name>
        <value>jdbc:mysql://localhost:3306/test</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>com.mysql.jdbc.Driver</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>2</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>root</value>
      </parameter>
    </ResourceParams>
web.xml
<resource-ref> 
<description>MySQL Connection Pool</description> 
<res-ref-name>testMysql</res-ref-name> 
<res-type>javax.sql.DataSource</res-type> 
<res-auth>Container</res-auth> 
</resource-ref> <Context> 
<ResourceLink name="testMysql" global="testMysql" type="javax.sql.DataSourcer"/> 
</Context>jsp page
Context initCtx = new InitialContext(); 
Context ctx = (Context) initCtx.lookup("java:comp/env"); 
Object obj = (Object) ctx.lookup("testMysql"); 
javax.sql.DataSource ds = (javax.sql.DataSource)obj; 
conn = ds.getConnection(,); mysql-connector-java-5.0.2-beta-bin.jar,mysql-connector-java-3.0.17-ga-bin.jar
这两个文件也都copy到了common\bin下同时也copy到了web-inf\lib下但是运行jsp 页面却出现
org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
        at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:780)
        at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:554)
        at org.apache.jsp.index_jsp._jspService(index_jsp.java:66)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
        at java.lang.Thread.run(Thread.java:534)
Caused by: java.sql.SQLException: No suitable driver
        at java.sql.DriverManager.getDriver(DriverManager.java:243)
        at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:773)
请高手指教