아래 에러는 왜뜨는건가요. 고수님들 좀갈켜주세요..

Error: 500

Location: /index.jsp

Internal Servlet Error:

javax.servlet.ServletException: Unable to load class oracle.jdbc.driver.OracleDriver

at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:386)

at _0002findex_0002ejspindex_jsp_0._jspService(_0002findex_0002ejspindex_jsp_0.java:593)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:126)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:174)

at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:261)

at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:369)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:503)

at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559)

at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:156)

at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:338)

at java.lang.Thread.run(Thread.java:475)

...