Set HTML dropdown selected option using JSTL

Question

In the same context i have another query

<select multiple="multiple" name="prodSKUs">
            <c:forEach items="${productSubCategoryList}" var="productSubCategoryList">
          <option value="${productSubCategoryList}"${productSubCategoryList == productSubCategoryName ? 'selected' : ''}>${productSubCategoryList}</option>
         </c:forEach>
        </select>

and the corresponding setting in request is like

for(int i=0;i<userProductData.size();i++){
    String productSubCategoryName=userProductData.get(i).getProductSubCategory();
    System.out.println(productSubCategoryName);
    request.setAttribute("productSubCategoryName",productSubCategoryName);

}

here i have multiple select drop down ,even though i get the return value from for as two ,in the UI only one data is getting higlighted not the second one,What is wrong in the code ?

Maurice Perry · Accepted Answer · 2010-04-22T06:01:53.570

Assuming that you have a collection ${roles} of the elements to put in the combo, and ${selected} the selected element, It would go like this:

<select name='role'>
    <option value="${selected}" selected>${selected}</option>
    <c:forEach items="${roles}" var="role">
        <c:if test="${role != selected}">
            <option value="${role}">${role}</option>
        </c:if>
    </c:forEach>
</select>

UPDATE (next question)

You are overwriting the attribute "productSubCategoryName". At the end of the for loop, the last productSubCategoryName.

Because of the limitations of the expression language, I think the best way to deal with this is to use a map:

Map<String,Boolean> map = new HashMap<String,Boolean>();
for(int i=0;i<userProductData.size();i++){
    String productSubCategoryName=userProductData.get(i).getProductSubCategory();
    System.out.println(productSubCategoryName);
    map.put(productSubCategoryName, true);
}
request.setAttribute("productSubCategoryMap", map);

And then in the JSP:

<select multiple="multiple" name="prodSKUs">
    <c:forEach items="${productSubCategoryList}" var="productSubCategoryList">
        <option value="${productSubCategoryList}" ${not empty productSubCategoryMap[productSubCategoryList] ? 'selected' : ''}>${productSubCategoryList}</option>
    </c:forEach>
</select>

@BalusC: yes that's what was asked for, @sarah: my answer to your next question is ready — Maurice Perry, Apr 22 '10 at 06:03

BalusC · Answer 2 · 2017-04-05T17:11:32.587

12

In Servlet do:

String selectedRole = "rat"; // Or "cat" or whatever you'd like.
request.setAttribute("selectedRole", selectedRole);

Then in JSP do:

<select name="roleName">
    <c:forEach items="${roleNames}" var="role">
        <option value="${role}" ${role == selectedRole ? 'selected' : ''}>${role}</option>
    </c:forEach>
</select>

It will print the selected attribute of the HTML <option> element so that you end up like:

<select name="roleName">
    <option value="cat">cat</option>
    <option value="rat" selected>rat</option>
    <option value="unicorn">unicorn</option>
</select>

Apart from the problem: this is not a combo box. This is a dropdown. A combo box is an editable dropdown.

edited Apr 05 '17 at 17:11

answered Apr 21 '10 at 12:00

BalusC

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what if the select was with the attribute "multiple" and they might be more than one selected roles? – storm_buster Nov 01 '10 at 01:10
@stunaz: I've already answered this in your own question: http://stackoverflow.com/questions/4059922/how-can-i-do-a-multiselect-in-jsp-jstl-with-selected-value – BalusC Nov 01 '10 at 03:15
1

+1, stumbled across this looking for a more concise version of `selected="selected"`. – Matt Ball Mar 02 '11 at 22:00
Thanks so much for this, I've used ti but found that instead of "selected=${role == selectedRole ? 'selected' : ''}" it should be just ${role == selectedRole ? 'selected' : ''} , at least in my case. – Nenad Bulatović Apr 05 '17 at 15:17
1

@NenadBulatovic: Someone edited it later in, I have rolled back it to my original answer. – BalusC Apr 05 '17 at 17:11

score 3 · Answer 3 · answered Aug 18 '14 at 19:00

Real simple. You just need to have the string 'selected' added to the right option. In the following code, ${myBean.foo == val ? 'selected' : ' '} will add the string 'selected' if the option's value is the same as the bean value;

<select name="foo" id="foo" value="${myBean.foo}">
    <option value="">ALL</option>
    <c:forEach items="${fooList}" var="val"> 
        <option value="${val}" ${myBean.foo == val ? 'selected' : ' '}><c:out value="${val}" ></c:out></option>   
    </c:forEach>                     
</select>

Set HTML dropdown selected option using JSTL

3 Answers3

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