jdbc连接access数据库报错

xwhhwq 2017-10-28 09:41:59

源码如下
<%@ page language="java" import="java.sql.*" contentType="text/html;charset=gb2312"%>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=GBK">
</head>
<body>
<%
String dname="sun.jdbc.odbc.JdbcOdbcDriver";
String dbname="st";
String tname="student";
String url="jdbc:odbc:"+dbname;
String sql="select * from"+tname;
Class.forName(dname);
Connection con=DriverManager.getConnection(url);
Statement s=con.createStatement();
ResultSet rs=s.executeQuery(sql);
while(rs.next()){
out.print("<tr>");
out.print("<td>"+rs.getString("id")+"</td>");
out.print("<td>"+rs.getString("name")+"</td>");
out.print("<td>"+rs.getInt("score")+"</td>");
out.print("</tr>");

}
rs.close();
s.close();
con.close();
%>
</body>
</html>
报错
十月 28, 2017 9:40:44 上午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [jsp] in context with path [/t4] threw exception [An exception occurred processing JSP page /MyJsp.jsp at line 13

10: String tname="student";
11: String url="jdbc:odbc:"+dbname;
12: String sql="select * from"+tname;
13: Class.forName(dname);
14: Connection con=DriverManager.getConnection(url);
15: Statement s=con.createStatement();
16: ResultSet rs=s.executeQuery(sql);

Stacktrace:] with root cause
java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:126)
at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.apache.jsp.MyJsp_jsp._jspService(MyJsp_jsp.java:75)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

...全文