js实例，获取选中select标签的value和option text值

jsp页面，遍历得到option选项，值为userid，text为username

<div>
<select id="userId">
<c:forEach items="${userList}" var="user">
<option value="${user.userid}">${ user.username}</option>
</c:forEach>
</select>
</div>

js获取option值和text
var username = $("#userId").find("option:selected").text();

var userid = $("#userId").val();