Oracle数据库的连接池来连接页面，可是出现了如下错误，使用的驱动是classes12.jar，请大侠帮忙

严重: Servlet.service() for servlet UserServlet threw exception
java.lang.AbstractMethodError: oracle.jdbc.driver.OraclePreparedStatement.getParameterMetaData()Ljava/sql/ParameterMetaData;
at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.getParameterMetaData(DelegatingPreparedStatement.java:212)
at org.apache.commons.dbutils.QueryRunner.fillStatement(QueryRunner.java:176)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:394)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:488)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:466)
at cn.com.jobedu.blog.UserServlet.login(UserServlet.java:49)
at cn.com.jobedu.blog.UserServlet.doPost(UserServlet.java:31)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:619)