关于java网站错误的问题

基于windows 2003系统，tomcat作为支持平台，网站运行突然报错，错误信息如下：
HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception javax.servlet.ServletException: no ocijdbc9 in java.library.path
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.BTYXY.JSP.XUEYUAN.index_jsp._jspService(index_jsp.java:1227)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.lang.UnsatisfiedLinkError: no ocijdbc9 in java.library.path
java.lang.ClassLoader.loadLibrary(Unknown Source)
java.lang.Runtime.loadLibrary0(Unknown Source)
java.lang.System.loadLibrary(Unknown Source)
oracle.jdbc.oci8.OCIDBAccess.logon(OCIDBAccess.java:262)
oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:346)
oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)
oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
java.sql.DriverManager.getConnection(Unknown Source)
java.sql.DriverManager.getConnection(Unknown Source)
cn.DataUtil.conn.CIDNConnectionManager.ISgetConnection(CIDNConnectionManager.java:111)
cn.CIDN.Operation.OperationInfor.setListOperation(OperationInfor.java:85)
cn.CIDN.data.CIDNTableData.getListData(CIDNTableData.java:61)
org.apache.jsp.BTYXY.JSP.XUEYUAN.index_jsp._jspService(index_jsp.java:311)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.请教高手应该如何解决，最好说的详细一点，对JAVA刚刚接触，不是很熟悉。谢谢高手们帮忙！