如何将JSP页面表中的数据存入数据库？

<%
if(bean.validate()==true)

{TestBean.OpenConn("university","sa","");
String a=bean.getnumber();
String b=bean.getname();
String c=bean.getsex();
String d=bean.getnianlin();
String e=bean.getjiguan();
String f=bean.getyuanxi();
String sql="insert into student "+"values("+a+","+b+","+c+","+d+","+e+","+f+")";
TestBean.executeUpdate(sql);
%>


aq.execute:No suitable driver
sqlDataBaseBean.executeUpdata[Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]第一行:'."附近有语法错误
aq.execute:No suitable driver


请问这是什么错误啊？