JDBC driver is not on the CLASSPATH已经说得非常清楚啦,并不是吧jar拷到weblogic\server\lib就完事啦,你还要设置CLASSPATH,在bea8.1\weblogic81\common\bin中的commEnv.cmd设置CLASSPATH,如set WEBLOGIC_CLASSPATH=%JAVA_HOME%\lib\tools.jar;%WL_HOME%\server\lib\jds.jar;%WL_HOME%\server\lib\jdsremote.jar;%WL_HOME%\server\lib\jdsserver.jar;%WL_HOME%\server\lib\weblogic_sp.jar;%WL_HOME%\server\lib\weblogic.jar;%WL_HOME%\server\lib\ojdbc14.jar,用你的jar替换jds.jar,jdsserver.jar,jdsremote.jar这3个文件看看