Get value from drop down list in JSP/JSTL when option and c:out is used

问题

I have the following JSP code for a select statement pulling a list of names stored in a database as nameIDs and names. The drop down shows the names (not the ids)

   <select  id="name" name="name" onchange="updateName(value)">
    <option/>
    <c:forEach items="${nameForm.nameList}" var="val">
    <option ${nameForm.name eq val.nameId?'selected':''} 
                         value="<c:out value="${val.nameId}"/>">
        <c:out value="${val.name}"/>
    </option>
    </c:forEach>
    </select>

I'd like the updateName function to retrieve the value of the selected name. What the code below does is get the nameID not the value. I am not sure why value is returning an ID I am assuming val.nameId instead of the name selected in the list val.name

function updateName($1){

alert($1);

}

same thing if I use document.getElementById....

回答1:

And if you change this:

<select  id="name" name="name" onchange="updateName(value)">
<option/>
<c:forEach items="${nameForm.nameList}" var="val">
<option ${nameForm.name eq val.nameId?'selected':''} 
                     value="<c:out value="${val.nameId}"/>">
    <c:out value="${val.name}"/>
</option>
</c:forEach>
</select>

Into this:

<select  id="name" name="name" onchange="updateName(value)">
<option/>
<c:forEach items="${nameForm.nameList}" var="val">
<option ${nameForm.name eq val.nameId?'selected':''} 
                     value="<c:out value="${val.name}"/>">
    <c:out value="${val.name}"/>
</option>
</c:forEach>
</select>

Update

How about something like this: http://jsfiddle.net/robertrozas/y8e4B/

来源：https://stackoverflow.com/questions/24396695/get-value-from-drop-down-list-in-jsp-jstl-when-option-and-cout-is-used

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javascript

jquery

jsp

jstl