MyAjaxSelectionPage.xhtml

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui"
      xmlns:f="http://xmlns.jcp.org/jsf/core">
  <h:head>
    <link rel="stylesheet" href="#{request.contextPath}/themes/redmond/skin.css" />
  </h:head>
  <h:body>

    <h:form>  
      <p:messages id="myMessages"/>
      <p:panel header="Devingen Seçim" style="width:600px">
        <h:panelGrid columns="2" cellpadding="5">
          <p:selectOneMenu id="myCategory"
                           value="#{myAjaxSelectionBean.selectedCategoryCode}">  
            <f:selectItems  value="#{myAjaxSelectionBean.categoryItems}"/> 
            <p:ajax update="myProduct"  
                    listener="#{myAjaxSelectionBean.handleCategoryChange()}" />  
          </p:selectOneMenu>  

          <p:selectOneMenu id="myProduct" 
                           value="#{myAjaxSelectionBean.selectedProductCode}">  

            <f:selectItems  value="#{myAjaxSelectionBean.currentProductItems}"/>    
          </p:selectOneMenu>  

        </h:panelGrid>
        <p:commandLink value="Gönder" update="myMessages" 
                         action="#{myAjaxSelectionBean.submitForm()}" /> 
      </p:panel>

    </h:form> 
  </h:body>
</html>
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MyAjaxSelectionPage.xhtml

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