omn​​ifaces.SelectItemsConverter不工作

Question

我试图将omnifaces.SelectItemsConverter用于h:selectOneMenu，我正在omnifaces here的网站上尝试这个例子，但它不起作用，没有选择任何对象，我正在使用

<dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-impl</artifactId>
        <version>2.2.4</version>
    </dependency>
    <!-- Faces Library -->
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.2.4</version>
    </dependency>
    <!-- Primefaces Version 5 -->
    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>5.0</version>
    </dependency>
    <dependency>
        <groupId>org.omnifaces</groupId>
        <artifactId>omnifaces</artifactId>
        <version>1.8.1</version>
    </dependency>

这是我的页面，其余代码是here

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:o="http://omnifaces.org/ui"
xmlns:of="http://omnifaces.org/functions"
template="/templates/template.xhtml">
<ui:define name="metadata">
</ui:define>
<ui:define name="content">


    <h:form>
        <p>
            <b>Last selected item:</b>
            <h:outputText id="selected_item"
                value="#{selectItemsBean.selectedEntity.value}" />
        </p>

        <h:panelGrid columns="2">
            <h:outputLabel for="iterator" value="Items with iterator: " />
            <h:selectOneMenu id="iterator"
                value="#{selectItemsBean.selectedEntity}"
                converter="omnifaces.SelectItemsConverter">
                <f:selectItem itemLabel="Choose item" noSelectionOption="true" />
                <f:selectItems value="#{selectItemsBean.exampleEntities}"
                    var="entity" itemLabel="#{entity.value}" itemValue="#{entity}" />
                <f:ajax render="selected_item" />
            </h:selectOneMenu>

            <h:outputLabel for="iterator_def_value"
                value="Items with iterator (default value): " />
            <h:selectOneMenu id="iterator_def_value"
                value="#{selectItemsBean.selectedEntity}"
                converter="omnifaces.SelectItemsConverter">
                <f:selectItem itemLabel="Choose item" noSelectionOption="true" />
                <f:selectItems value="#{selectItemsBean.exampleEntities}"
                    var="entity" itemLabel="#{entity.value}" />
                <f:ajax render="selected_item" />
            </h:selectOneMenu>

            <h:outputLabel for="selectitems"
                value="Items with SelectItem list: " />
            <h:selectOneMenu id="selectitems"
                value="#{selectItemsBean.selectedEntity}"
                converter="omnifaces.SelectItemsConverter">
                <f:selectItem itemLabel="Choose item" noSelectionOption="true" />
                <f:selectItems value="#{selectItemsBean.selectItems}" />
                <f:ajax render="selected_item" />
            </h:selectOneMenu>

            <h:outputLabel for="selectitems_array"
                value="Items with SelectItem array: " />
            <h:selectOneMenu id="selectitems_array"
                value="#{selectItemsBean.selectedEntity}"
                converter="omnifaces.SelectItemsConverter">
                <f:selectItem itemLabel="Choose item" noSelectionOption="true" />
                <f:selectItems value="#{selectItemsBean.selectItemArray}" />
                <f:ajax render="selected_item" />
            </h:selectOneMenu>
        </h:panelGrid>
    </h:form>
</ui:define>

所以如果有任何建议我会更聪明？