JSP+JAVABEAN这个数据库操作怎么就是插入不进去了

<%@ page contentType="text/html;charset=GB2312"%>
<%@ page import="java.io.*"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<center>
<% String str=response.encodeURL("hh.jsp");%>
  <form action="<%=str%>" method="post">
<p>logname<input type="text" name="logname">
<p>password<input type="password" name="password">
<p>price<input type="text" name="price">
<br>
<input type="submit" value="ok">
<% x.b.database file=new x.b.database(); %>
<%
     String logname=request.getParameter("logname");
     if(logname==null){ logname="";}
     String password=request.getParameter("password");
     if(password==null) { password="";}
     String price=request.getParameter("price");
     if(price==null) {  price="";}  
      %>
<%
     if(!logname.equals("")){%>
<jsp:setProperty name="file" property="logname" value="<%=logname%>" />
<jsp:setProperty name="file" property="password" value="<%=password%>" />
<jsp:setProperty name="file" property="price" value="<%=price%>" />
<% file.addItem();////////////////////////////////////修改了这里还是没有用
out.print("ok le");
}
else
{
out.print("flase");}%>
</center>
</body>
</html>/////////////////////////////////////////////////////////////////////
package x.b;
import java.sql.*;
import java.io.*;
public class cha
{
   String logname="",password="",price="";
   Statement sql;
   Connection con;
   public cha()
   {
      try
      {
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
      }
      catch(ClassNotFoundException e)
       {
       }
   }
   public void setLogname(String a)
   {
     logname=a;
   }
   public void setPasswrod(String b)
   {
     password=b;
   }
   public void setPrice(String c)
    {
       price=c;
    }
    public String getName()
    {
       return logname;
    }
    public String getPassword()
    {
       return password;
    }
    public String getPrice()
    {
       return price;
    }
    public void addItem()
    {
        try
        {
          con=DriverManager.getConnection("jdbc:odbc:sa");
          sql=con.createStatement();
          String s="insert into d values("+"'"+logname+"',"+"'"+password+"',"+"'"+price+"')";
          sql.executeUpdate(s);
        }
        catch(Exception e1)
        {
        }
    }}