燃气平扒炉价格:急求SQLserver 2000 驱动的安装问题解决!!!

为什么我已经安装了jdbc驱动,然后把三个jar文件拷贝到jdk\jre\lib\ext下,然后我编译执行我的java程序对sqlserver进行访问的时候却classnotfountexception:com.microsoft.jdbc.sqlserver.SQLServerDriver?各位大侠,给我建议!!!!!
这是我的测试程序:

import java.sql.*;
import java.io.*;
public class dbconn
{
public static void main(String[] args) throws Exception
{
try
{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
Connection conn = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433;datebase=oak2005","sa","");
Statement st = conn.createStatement();
String sql = "select *from oak";
ResultSet rs = st.executeQuery(sql);
while(rs.next())
{
System.out.println(rs.getString(1));
System.out.println(rs.getString(2));
}
rs.close();
st.close();
conn.close();
}
catch (Exception e)
{
System.out.println(e);
}

}
}
谢谢你的回应啊!不过我将身份验证也改了不过还是不行,是否还有解决办法???