选择下拉项时显示数据库中的图像

Question

我有一个由数据库填充的下拉菜单。下拉菜单中有与每个项目相关的图像。我要在选择下拉菜单时显示图像。

这是我的jsp代码。

<tr>
   <td>Alloy Wheel:</td>
   <%
     try {
         dbConnect dbConnect = new dbConnect();
         Connection currentCon = dbConnect.Connect();
         String sql = "SELECT * FROM alloywheel";
         PreparedStatement ps = currentCon.prepareStatement(sql);
         ResultSet rs = ps.executeQuery();
         String img = rs.getString("alloy_image");
   %>
   <td>
       <select class="form-control" name="alloy">
       <option value="0">Select your alloywheel design</option>
       <%
         while (rs.next()) {
             int aid = rs.getInt("alloy_id");
             String aname = rs.getString("alloy_color");
             int aprice = rs.getInt("alloy_price");
       %>
       <option value="<%=aid%>"><%=aname%> : <%=aprice%></option>
       <%
         }
       %>
       </select>
       <%
          } catch (Exception e) {
             system.out.println(e);
       }
       %>                                
       </td>
       <td>
          The image should be displayed here
       </td>
</tr>
<tr>
       <td colspan="3">
           <button class="btn btn-success form-control">
                 Add to the cart
           </button>
       </td>
</tr>