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(问题已解决)我有一个 jsf2-spring-hibernate 项目,每次单击按钮时,bean 中的构造函数和 postconstruct 都会被调用,而我要执行的实际单击侦听器将被忽略。请注意 bean 是 sessionscoped (不是请求),可能它应该是 viewscoped ——但这会干扰 Spring 吗?注意 2:我尝试了 ViewScoped,结果相同。

提示我的问题是 clickListener (下面)没有执行

<h:selectOneListbox id="listBox" value="#{ScheduleMB.clients}" size="5"  
    rendered="#{ScheduleMB.showClients}" >
    <f:selectItems value="#{ScheduleMB.clientList}" var="c"
    itemLabel="#{c.lastName}" itemValue="#{c.lastName}" />
    <f:ajax event="click" listener="#{ScheduleMB.clickListener}"  
    render="group" />
</h:selectOneListbox>

我试图做的是在用户单击按钮时出现客户端列表(按钮未在上面显示,但包含在下面的完整 jsf2 页面中)。当用户单击列表框时,clicklistener 被激活并且 bean 处理单击的值。

第二次编辑 - 我的 facelet 包括绑定到 bean,这似乎是导致 bean 在 vi​​ewscope 中重建的原因,但不是 sessionscope。

编辑 - 我做了一些更改 1) 我确保我的 bean 扩展的类是抽象的。这允许 ajax 代码工作,但是即使在 viewscoped 下,构造函数仍然运行了几次,我不确定这是否应该发生。2)将范围更改为会话,其他更改一切正常。

所以我的问题是,为什么构造函数在 ViewScoped 时仍然多次触发?

原始问题:

下面是完整的 jsf2 页面(下面是 javabean)。

<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:p="http://primefaces.org/ui"
xmlns:t="http://myfaces.apache.org/tomahawk">


<h:form>   

    <h3>TimeOnly</h3>

    <t:div style="position: absolute; left: 5px; top: 5px; right: 5px; width: 875px ">
        <t:schedule value="#{ScheduleMB.model}" id="schedule1"
            binding="#{ScheduleMB.schedule}"
            rendered="true" visibleEndHour="18" visibleStartHour="8"
            workingEndHour="17" workingStartHour="9" readonly="false"
            theme="default" tooltip="true"
            submitOnClick="true"
            mouseListener="#{ScheduleMB.scheduleClicked}"
            action="#{ScheduleMB.scheduleAction}" />
    </t:div>

    <t:div style="position: absolute; left: 925px; top: 5px; width: 210px; overflow: auto">
        <h:panelGrid columns="1">
            <t:inputCalendar id="scheduleNavigator"
                value="#{ScheduleMB.model.selectedDate}" />
        </h:panelGrid>
    </t:div>

    <t:div style="position: absolute; left: 890px; top: 190px; width: 325px; overflow: auto; font-size: 14px; 
        text-align: left; height: 270px" >
        <h:panelGrid columns="1" rendered="true">
            <h:outputLabel>Enter From Date:Time</h:outputLabel>

            <t:inputDate popupCalendar="true" type="both" value="#{ScheduleMB.from}"/>

            <h:outputLabel>Enter To  Date:Time</h:outputLabel>

            <t:inputDate popupCalendar="true" type="both" value="#{ScheduleMB.to}"/>
            <h:outputLabel for="TitleText" value="Title:"/>
            <h:panelGroup id="group">
                <h:inputText id="TitleText" value="#{ScheduleMB.title}"/>
                <h:commandButton value="Clients" >
                    <f:ajax event="click" listener="#{ScheduleMB.clientList}"
                    render="group"/>
                </h:commandButton>

                <h:selectOneListbox id="listBox" value="#{ScheduleMB.clients}" size="5"  
                rendered="#{ScheduleMB.showClients}" >
                    <f:selectItems value="#{ScheduleMB.clientList}" var="c"
                        itemLabel="#{c.lastName}" itemValue="#{c.lastName}" />
                    <f:ajax event="click" listener="#{ScheduleMB.clickListener}"  
                        render="group" />
                </h:selectOneListbox>
            </h:panelGroup>
            <h:outputLabel for="DescText" value="Description:"/>
            <h:inputText id="DescText" value="#{ScheduleMB.description}"/>
            <h:panelGroup>
                <h:commandButton
                actionListener="#{ScheduleMB.addNewEntry}"
                value="Add entry" rendered="#{not ScheduleMB.model.entrySelected}"/>

                <h:commandButton
                actionListener="#{ScheduleMB.deleteSelectedEntry}"
                value="Delete entry"
                rendered="#{ScheduleMB.model.entrySelected}"/>
            </h:panelGroup>
        </h:panelGrid>
    </t:div>

 </h:form>
</html>

这是 Sessionscoped bean(我已经消除了很多不相关的部分):

@ManagedBean(name="ScheduleMB")
@SessionScoped
public class ScheduleMB extends ScheduleBase
                                     implements Serializable
{
 Map<String,Object> clientValues = new HashMap<String,Object>();
 List<Client> clientValues2 = new ArrayList<Client>();

@ManagedProperty(value="#{UserService}")
IUserService userService;   

public ScheduleMB() {
    clients="hello";   //I put a breakpoint here just to be sure it was called

    }
@PostConstruct
public void init() {
    createClientValues();

}



//This part is not executing.
  public void clickListener(AjaxBehaviorEvent event){
    this.title = clients;
    showClients = false;
    renderClientList=false;

}



public List<Client> getClientList() {
    return clientValues2;
}

private void createClientValues() {

    clientValues2 = userService.findAllClients();

}

public void clientList() {
    showClients=true;
}


public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

public String getClients() {
    return clients;
}

public void setClients(String clients) {
    this.clients = clients;
}

    public boolean isRenderClientList() {
    return renderClientList;
}

public void setRenderClientList(boolean renderClientList) {
    this.renderClientList = renderClientList;
}

public boolean isShowClients() {
    return showClients;
}

public void setShowClients(boolean showClients) {
    this.showClients = showClients;
}

public IUserService getUserService() {
    return userService;
}

public void setUserService(IUserService userService) {
    this.userService = userService;
}
 }
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1 回答 1

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弄清楚问题是什么以及如何解决它。最初的症状是我的 f:ajax click 事件没有触发关联的 bean 方法,并且每个交互都在构建 bean,尽管是 viewscoped。我仔细检查了 bean 并注意到它的父类不是抽象的并且具有不一致的范围。我消除了范围并将其抽象化。我还将主 bean 的作用域更改为 session,因为 facelet 绑定到 bean,这也将导致在 viewscoped 下的每个交互都调用构造函数。问题解决了。

于 2012-09-07T14:47:08.370 回答