求教！JSP查询页面实现修改功能

<%
      Connection conn = null;
      Statement st = null;
      ResultSet rs = null;
      Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
      String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=testDatabase";
      String user = "sa";   
      String password = "fangfang";   
      String sql = "select * from account";   
      conn = DriverManager.getConnection(url,user,password);   
      st = conn.createStatement();     
      rs = st.executeQuery(sql);   
    %>
<table border="1" cellpadding="0" cellspacing="0" align="center">
<tr>
<td colspan="6" align="center">account表信息 </td>
</tr>
<tr>
<td>账号 </td>
<td>户名 </td>
<td>余额 </td>
<td>注册时间 </td>
</tr>
<%
          while(rs.next()){
              long account_id =