在布局更改后,IceFaces在组合,菜单中重复输入条目

时间:2011-07-25 13:55:40

标签: java icefaces

我的基于IceFaces 1.8的应用程序以一个非常简单的xhtml开头,其中包含一个基于bean属性的不同的xhtml。此属性绑定到每个页面中包含的组合项。如果用户从此组合中选择布局,则页面将更新为新布局。

没关系,除了在每次单页布局更改后,布局选择器组合中的项目都会重复,重复三次等等。

这是“多路复用器”xhtml:

<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:ice="http://www.icesoft.com/icefaces/component">

    <ui:include src="#{system.layout}">
    </ui:include>

</html>

这是布局选择器,包含在每个布局xhtml中:

  <ice:form id="layoutSelectForm">
        <ice:outputLabel for="layoutSelector">#{msgs['LayoutSelect.Label']}: </ice:outputLabel>
        <ice:selectOneMenu id="layoutSelector" binding="#{layoutSelect.som}" value="#{layoutSelect.selectedLayout}" 
            valueChangeListener="#{layoutSelect.processValueChange}" partialSubmit="true">
            <f:selectItems value="#{layoutSelect.allLayouts}" />
        </ice:selectOneMenu >
  </ice:form>

以下是LayoutSelect支持bean的代码:

public class JSFLayoutSelect implements InitializingBean, ValueChangeListener {
    private EventManager eventManager;
    private String mainApplFrmURL;
    private HtmlSelectOneMenu som;
    public List<SelectItem> allLayouts;
    private String selectedLayout;

        @Override
    public void processValueChange(ValueChangeEvent event)
            throws AbortProcessingException {
        eventManager.publish("layout-select/change", event.getNewValue());
        logger.info("Layout changed event occured: " + event.getNewValue());

        try {
            FacesContext.getCurrentInstance().getExternalContext().redirect(mainApplFrmURL);
        } catch (IOException e) {
            logger.error(e.getMessage());
        }
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        allLayouts = new ArrayList<SelectItem>();
        allLayouts.add(new SelectItem("dev", "Core Dev"));
        allLayouts.add(new SelectItem("classic", "Core Classic"));
        allLayouts.add(new SelectItem("modern", "Core Modern"));
        selectedLayout = "dev";
    }

    public List<SelectItem> getAllLayouts() {
        return allLayouts;
    }

    public String getSelectedLayout() {
        return selectedLayout;
    }

        /* some unimportant methods are not here */
}

  <bean name="layoutSelect" class="hu.hgap.comp.impl.JSFLayoutSelect" scope="session">
    <property name="eventManager" ref="SessionEventManager"/>
     <property name="mainApplFrmURL" value="/ICEFacesSpringDemoV2/secured/ApplFrm.faces" />
  </bean>

你能告诉我怎么做才能避免重复组合条目吗?我看到在更改布局后,再次呈现相同的组合,并再次从服务器将组合项目推入其中。

1 个答案:

答案 0 :(得分:0)

你的支持豆是什么样子的?它有哪个范围?

我在会话范围bean中有类似的绑定变量经验。当我将变量移动到请求scopre bean时,问题就消失了。