JSP中引用一个外部数据库连接池的错误

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在工程目录下有一个数据库连接池的类ConnectionPool，文件名为：ConnectionPool.java

在JSP中我想引入数据库连接池。开发环境是:Myeclipse + Tomcat.相关代码为：

<body>
<h2>查询结果:</h2>
<%!String sql="select username,password from sa.user";%>
<%
ConnectionPool pool =new ConnectionPool(
"oracle.jdbc.driver.OracleDriver",
"jdbc:oracle:thin:@100.200.100.1:1521:ORACLEDB",
"sa",
"sa"
);
pool.createPool();
Connection con =pool.getConnection();
PreparedStatement stmt =con.prepareStatement(sql);
ResultSet rs =stmt.executeQuery();
ResultSetMetaData rsData =rs.getMetaData();
out.println("<table border='1'>");
while(rs.next()){
out.println("<tr><th>"+rsData.getColumnLabel(0)+"</th></tr>");
out.println("<tr><th>"+rsData.getColumnLabel(1)+"</th></tr>");
}
out.println("</table>");
con.close();
pool.closeConnectionPool();
%>
</body>

报错信息有：
org.apache.jasper.JasperException: An exception occurred processing JSP page /DisplyDBInformation.jsp at line 23

20: "nmsdb",
21: "nmsdb"
22: );
23: pool.createPool();
24: Connection con =pool.getConnection();
25: PreparedStatement stmt =con.prepareStatement(sql);
26: ResultSet rs =stmt.executeQuery();

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:401)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

javax.servlet.ServletException: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:862)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
org.apache.jsp.DisplyDBInformation_jsp._jspService(DisplyDBInformation_jsp.java:106)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:169)
com.bird.beans.ConnectionPool.createPool(ConnectionPool.java:206)
org.apache.jsp.DisplyDBInformation_jsp._jspService(DisplyDBInformation_jsp.java:84)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

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