如何从javascript到jsp选择选项值

时间:2015-06-29 18:09:21

标签: javascript jsp

我的html有一个选择选项值框,如果我从该框中选择任何选项,我将在javascript中获得值,但我想在jsp中使用此值,因为使用此字符串我显示从数据库中选择的行,我尝试请求.getparameter也没有用 代码:

<script type="text/javascript">
function getAppId()
{
  var value=document.getElementById("planeselect").value;
  document.getElementById("demo").innerHTML="application Id:"+value;

}
</script>

<select id="planeselect" onchange="getAppId()">
        <%
             Set<String> set=appsList.keySet();
            for (String s:set) {
                String appName = (String) appsList.get(s);
        %>
        <option value="<%=s%>"><%=appName%></option>
        <%
            }
        %>
    </select>

1 个答案:

答案 0 :(得分:0)

在更改后,您可以加载页面并使用 request.getParameter()

<script type="text/javascript">
function getAppId()
{
  var value=document.getElementById("planeselect").value;
  document.getElementById("demo").innerHTML="application Id:"+value;
  window.location="URL_of_this_page?RequiredValue="+value;
 }
</script>

<%
     String ValueRequired=request.getParameter("RequiredValue");
     if(ValueRequired!=null){
               *****operation which you want to perform*****
      }
%>  

    <select id="planeselect" onchange="getAppId()">
    <% 
        Set<String> set=appsList.keySet();
        for (String s:set) {
            String appName = (String) appsList.get(s);
    %>
    <option value="<%=s%>"><%=appName%></option>
    <%
        }
    %>
   </select>