这是jsp页面,其中应用了下拉列表选项以检索和添加值集
<tr>
<td> </td>
<td width="25%">Vehicle Type :-</td>
<td width="25%">
<select value="${veh_type}" style="width:115px;" name="slct_V_type" id="slct_V_type">
<option>Select a Type</option>
<option value="Wagon">Wagon</option>
<option value="Truck">Truck</option>
<option value="Bus">Bus</option>
<option value="SUV">SUV</option>
<option value="Sedan">Sedan</option>
<option value="Minivan">Minivan</option>
<option value="Luxury">Luxury</option>
<option value="Hybrid">Hybrid</option>
<option value="Hatchback">Hatchback</option>
<option value="Coupe">Coupe</option>
</select></td>
<td width="25%"> </td>
</tr>
<td width="25%"><input style="width:100px;" type="submit" name="bttnsrch" id="bttnsrch" value="Search" /></td>
ere是servlet搜索按钮编码,它将数据传递给数据库
if(request.getParameter("bttnsrch")!=null)
{
int Reg=Integer.parseInt(request.getParameter("Reg_number"));
ResultSet rs=SQL.CaptureVehicleInfo(Reg);
while(rs.next())
{
String veh_type=rs.getString(1);
request.setAttribute("veh_type", veh_type);
String reg_num=rs.getString(2);
request.setAttribute("reg_num", reg_num);
String veh_brand=rs.getString(3);
request.setAttribute("veh_brand", veh_brand);
String veh_model=rs.getString(4);
request.setAttribute("veh_model", veh_model);
String veh_man_year=rs.getString(5);
request.setAttribute("veh_man_year", veh_man_year);
String no_of_seat=rs.getString(6);
request.setAttribute("no_of_seat", no_of_seat);
String trasm=rs.getString(7);
request.setAttribute("trasm", trasm);
String air_con=rs.getString(8);
request.setAttribute("air_con", air_con);
}
request.getRequestDispatcher("Vehicle_Information.jsp").forward(request, response);
response.sendRedirect("Vehicle_Information.jsp");
}
这是我创建的用于从数据库中搜索车辆信息的SQL语句。
public ResultSet CaptureVehicleInfo(int Register_number)
{
ResultSet rs;
try
{
SQL=createConnection();
PreparedStatement ps;
String str="SELECT * FROM vehicle_information WHERE Register_number=?";
ps=SQL.prepareStatement(str);
ps.setInt(1, Register_number);
rs=ps.executeQuery();
return rs;
}
catch(Exception e)
{
rs=null;
return rs;
}
}
答案 0 :(得分:0)
您需要迭代select
标记内的值。你可以使用jstl
forEach标签轻松完成,如下所示,
<select style="width:115px;" name="slct_V_type" id="slct_V_type">
<c:forEach var="temp" items="${veh_type}">
<option value="${temp.name}">${temp.name}</option>
</c:forEach>
</select>
不要忘记为jstl支持添加taglib
,
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
我希望${veh_type}
包含对象列表