如何从jsp到servlet获取几个下拉列表的值

i have a question when i try to capture the value of dropdown list from jsp file to servlet.

我有一个问题,当我尝试从jsp文件捕获下拉列表的值到servlet。

        <select name="extraroom">
            <c:if test="${booking.roomType ne 'single'}">
                <c:forEach var="i" begin="0" end="${booking.count}">
                    <option value="<c:out value="${i}"/>"><c:out value="${i}"/></option>
                </c:forEach>
            </c:if>
        </select>

i use Integer.parseInt(request.getParameter("extraroom"))

我使用Integer.parseInt(request.getParameter(“extraroom”))

i have many drop down lists according to different roomType. but the result in java servlet always get the value of the first dropdown lists...

我根据不同的roomType有很多下拉列表。但是java servlet中的结果总是得到第一个下拉列表的值...

what should i change in servlet?

我应该在servlet中改变什么?

Thank you.

1 个解决方案

#1

For a select to be retrieved by a server the select has to

对于要由服务器检索的选择,select必须

be inside a form and

在一个表格里面

have a unique name identifier inside (it; best the identifier is unqiue across the entire DOM tree)

内部有一个唯一的名称标识符(它;最好的标识符在整个DOM树中是unqiue)

#1