请问：以下是什么问题？thanks!!!!!!!!!!!!!!!

type Exception reportmessage Internal Server Errordescription The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.

D:\Anti20040823\Tomcat\work\AntiWeb\OperationManage\ACSave$jsp.java:0: The method oracle.jdbc2.Ref getRef(int) declared in interface oracle.jdbc.OracleResultSet cannot override the method of the same signature declared in interface java.sql.ResultSet. They must have the same return type.
package org.apache.jsp;
^

D:\Anti20040823\Tomcat\work\AntiWeb\OperationManage\ACSave$jsp.java:0: The method oracle.jdbc2.Ref getRef(java.lang.String) declared in interface oracle.jdbc.OracleResultSet cannot override the method of the same signature declared in interface java.sql.ResultSet. They must have the same return type.
package org.apache.jsp;