Robert 的部落格

示例：

<form action="some.jsp">
  <select name="item">
    <option value="1">a</option>
    <option value="2">b</option>
    <option value="3">c</option>
  </select>
  <input type="submit" value="Submit">
</form>

String value = request.getParameter("item");  // 取得的是"1"或"2"或"3"哦.

參考：
● How to get the selected value from drop down list in jsp? - Stack Overflow