我正在使用Primefaces的计划组件。我用数据库中的值填充它，并且当用户从selectonemenu中选择某项时，会触发ajax事件（如果缺少某项，请尝试放入相关代码，请提醒我）：
xhtml：
<h:outputText value="Scope :" />
<h:selectOneMenu id="scope" value="#{scheduleView.scope}">
<f:selectItems value="#{lookup.scopeCombo}"/>
<p:ajax process="scope" update="schedule, scheduleForm, scheduleFormPG" listener="#{scheduleView.changeScopeType()}"/>
</h:selectOneMenu>
<p:schedule id="schedule" value="#{scheduleView.model}" editable="true"/>
后备豆：
@ManagedBean
@ViewScoped
public class ScheduleView implements Serializable {
@PostConstruct
public void init() {
System.out.println("Init ");
scopeChange();
}
public void scopeChange(String scope){
System.out.println("scopeChange ");
model.clear();
events = (List<Event>) commonServis.bringEverythingByCriteria(Event.class, "scope" , scope);
for(int i= 0; i<events.size();i++){
model.addEvent(new DefaultScheduleEvent(events.get(i).getAd(), events.get(i).getStartDate(),events.get(i).getEndDate()));
}
public void changeScopeType() {
System.out.println("changeScopeType ");
scopeChange (scope);
}
上面代码的输出是：
Init
scopeChange
当用户更改选择菜单中的值时：
changeScopeType
Init
scopeChange
它应该只进入
init方法一次。但是在触发changeScopeType函数后，它进入init方法并用不相关的数据填充计划。我以为可能与@Postconstruct注释有关，但找不到任何相关的解释。谁能理解原因并提供解决方案？这是整页：
<?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">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://prime.primefaces.org/ui"
template="templates/layout.xhtml"
xmlns:c="http://java.sun.com/jsp/jstl/core">
<ui:define name="title">#{labels.schedule}</ui:define>
<ui:define name="content">
<h:form id="scheduleForm">
<h:panelGrid id="scheduleFormPG">
<p:growl id="msgs" />
<p:dialog modal="true" widgetVar="statusDialog" header="Status" draggable="false">
<h:graphicImage value="resources/images/ajax-loader.gif" />
</p:dialog>
<p:dialog showEffect="explode" hideEffect="explode" resizable="false"
header="warning" widgetVar="confirmationErase" appendToBody="true" modal="true">
<h:outputText value="Are you sure?"/>
<br/>
<p:commandButton value="Yes" actionListener="#{scheduleView.deleteEvent(AE)}"
update="msgs, scheduleFormPG, schedule, wrapperPanel"
onstart="statusDialog.show(),confirmationErase.hide()"
oncomplete="statusDialog.hide(), eventDialog.hide()" process="@parent, scope" />
<p:commandButton value="No" onclick="confirmationErase.hide()" type="button" />
</p:dialog>
<h:outputText value="scope :" />
<h:selectOneMenu id="scope" value="#{scheduleView.scope}">
<f:selectItems value="#{lookup.scopeTypeCombo}"/>
<p:ajax process="scope" update="schedule, scheduleForm, scheduleFormPG" listener="#{scheduleView.changeScopeType()}"/>
</h:selectOneMenu>
</h:panelGrid>
<p:schedule onDateSelectUpdate="wrapperPanel"
onEventSelectUpdate="wrapperPanel" onEventSelectComplete="eventDialog.show()" eventSelectListener="#{scheduleView.onEventSelect}"
onDateSelectComplete="eventDialog.show();" dateSelectListener="#{scheduleView.onDateSelect}" id="schedule" value="#{scheduleView.model}" editable="true"/>
<p:dialog id="dialog111" widgetVar="eventDialog" header="Event Information" showEffect="clip" hideEffect="clip">
<p:panel id="wrapperPanel">
<h:panelGrid id="eventDetails" columns="2">
<h:outputLabel for="eventName" value="Event Name *: " />
<p:inputText id="eventName" value="#{scheduleView.event.title}" required="true"/>
<h:outputLabel value="Start Date:" />
<p:calendar id="sKalender" value="#{scheduleView.event.startDate}">
<f:convertDateTime pattern="dd/MM/yyyy" />
</p:calendar>
<h:outputLabel value="End Date:" />
<p:calendar id="eKalender" value="#{scheduleView.event.endDate}">
<f:convertDateTime pattern="dd/MM/yyyy" />
</p:calendar>
<h:outputLabel value="All Day:" />
<h:selectBooleanCheckbox id="allDay" value="#{scheduleView.event.allDay}" />
<h:outputLabel value="scope: " />
<h:selectOneMenu id="scopeChoice" value="#{scheduleView.event.scope}">
<f:selectItems value="#{lookup.scopeTypeCombo}"/>
</h:selectOneMenu>
<p:commandButton onclick="confirmationErase.show()" oncomplete="eventDialog.hide()" update="wrapperPanel, msgs, schedule" type="reset" value="Delete" />
<p:commandButton value="Save" actionListener="#{scheduleView.addEvent(AE)}" process="@parent, scope" update="schedule wrapperPanel msgs scheduleForm" oncomplete="eventDialog.hide();"/>
</h:panelGrid>
</p:panel>
</p:dialog>
</h:form>
</ui:define>
</ui:composition>
最佳答案
问题是这行代码：
<p:ajax process="scope" update="schedule, scheduleForm, scheduleFormPG" listener="#{scheduleView.changeScopeType()}"/>
更新正在刷新整个页面，而应该只更新计划。当我将其更改为：
update="schedule"
问题解决了。
感谢大家的努力。