<h:selectOneMenu id=”items” value=”#{bean.selectedItem}”> <f:selectItem itemLabel=”10″ itemValue=”10″/> <f:selectItem itemLabel=”20″ itemValue=”20″/> <f:selectItem itemLabel=”30″ itemValue=”30″/> </h:selectOneMenu> The default selection would be the one which has value same as selectedItem which you set in bean. selectedItem = 20;
Introduction JSF generates HTML. HTML is in Java terms basically one large String. To represent Java objects in HTML, they have to be converted to String. Also, when a HTML form is submitted, the submitted values are treated as String in the HTTP request parameters. Under the covers, JSF extracts them from the HttpServletRequest#getParameter() which … Read more
Just explicitly set the select item value to null. <h:selectOneMenu value=”#{bean.selectedItem}”> <f:selectItem itemValue=”#{null}” itemLabel=”–select–” /> <f:selectItems value=”#{bean.availableItems}” /> </h:selectOneMenu> No, an empty string like itemValue=”” is not sufficient. It really has to be null. Otherwise you run into trouble as described in this Q&A: Using a “Please select” f:selectItem with null/empty value inside a p:selectOneMenu. … Read more
Based on your question history, you’re using JSF 2.x. So, here’s a JSF 2.x targeted answer. In JSF 1.x you would be forced to wrap item values/labels in ugly SelectItem instances. This is fortunately not needed anymore in JSF 2.x. Basic example To answer your question directly, just use <f:selectItems> whose value points to a … Read more
Validation fails with the message “form:location: Validation Error: Value is not valid” This error boils down to that the selected item does not match any of the available select item values specified by any nested <f:selectItem(s)> tag during processing of the form submit request. As part of safeguard against tampered/hacked requests, JSF will reiterate over … Read more
JSF has a builtin converter for enum, so this should do: @Named @ApplicationScoped public class Data { public Status[] getStatuses() { return Status.values(); } } with <h:selectOneMenu value=”#{bean.question.status}” > <f:selectItems value=”#{data.statuses}” /> </h:selectOneMenu> (note: since JSF 2.0 there’s no need anymore to provide a SelectItem[] or List<SelectItem>, a T[] and List<T> are accepted as well … Read more