简单的数据库连接，为何加上一段代码就不显示了呢？

不加带颜色的那段正常，一加上就不显示了，高手帮忙！<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.sql.*" %>
<html>
<body>
<% 
   Connection con;
   Statement st;
   ResultSet rs;
   int n;
   
   
   try
   {
      Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
   }
   catch(ClassNotFoundException e){}
   try
   { 
      con=DriverManager.getConnection("jdbc:odbc:sun","sa","");
      st=con.createStatement();
      rs=st.executeQuery("select * from students");
      
      rs.last();
      n = rs.getRow();
                        rs.absolute(1);
      out.print("共有"+n+"条记录");
      out.print("<br>");       
      out.print("<Table Border>");
      out.print("<TR>");
      out.print("<th width=100>"+" 学号");
      out.print("<th width=100>"+" 姓名");
      out.print("</TR>");
     
      
      
    while(rs.next())
      {  
        out.print("<TR>");
        out.print("<td>"+rs.getString(1)+"</td>"); 
        out.print("<td>"+rs.getString(2)+"</td>"); 
        out.print("</TR>");
       }
       out.print("</Table>");
       con.close();
       }
       catch(SQLException ee){}
       
       %>
       
      </body>
    </html>