<select name="locdropdown" onchange="javascript:change()" >
<%
for(LocationDO locationDO : locationList){%>
<option value=<%=locationDO.getLocationName().trim()%>><%=locationDO.getLocationName().trim()%></option>
<%} %>
</select>

BI Sholingar
 BI Mahindra City
 BI Sanand
 Rolltec_DTA
 Aztec Auto Ltd
 BI Gurgoan

String locclasses = req.getParameter("locdropdown");
System.out.println(locclasses);

<select name="locdropdown" onchange="javascript:change()" >
<%
for(LocationDO locationDO : locationList)
{%>
<option value="<%=locationDO.getLocationName().trim()%>" >
        <%=locationDO.getLocationName().trim()%>
</option>
<%}

%>
</select>