Primefaces 对话框操作在初始化期间被调用
我有一个简单的 JSF 对话框，它包含在页面中，如下所示：
<ui:include src="add.xhtml"/>
在这个对话框中，我有一个
<p:dialog id="spidDialog" header="New SPID Operator" widgetVar="add">
<h:form>
<p:messages id="errorMsg" showDetail="true"/>
<h:panelGrid columns="2" id="addGrid">
<h:outputText style="font-size: smaller;" value="SPID Operator Name" />
<p:inputText id="Name" value="#{sBean.selectedName}" required="true"/>
<h:outputText style="font-size: smaller;" value="SPID Operator Code" />
<p:inputText id="Code" value="#{sBean.selectedCode}" required="true" />
</h:panelGrid>
<p:commandButton value="Save" actionListener="#{sBean.save(actionEvent)}"
oncomplete="handleDialog('spidDialog', args,add);"
update="editOperatorTabForm:Div growl editOperatorTabForm:Table"/>
<p:commandButton value="Cancel" onclick="add.hide();" immediate="true"/>
</h:form>
</p:dialog>
操作 #{ sBean.save(actionEvent)} 会导致 NullPointerException，但不应在初始化期间调用它。它是在没有任何用户交互的情况下被调用的，应该是这种情况吗？
I have a simple JSF Dialog which is included in the page like:
<ui:include src="add.xhtml"/>
In this dialog I have a <p:commandButton> which is executed without having been clicked...
<p:dialog id="spidDialog" header="New SPID Operator" widgetVar="add">
<h:form>
<p:messages id="errorMsg" showDetail="true"/>
<h:panelGrid columns="2" id="addGrid">
<h:outputText style="font-size: smaller;" value="SPID Operator Name" />
<p:inputText id="Name" value="#{sBean.selectedName}" required="true"/>
<h:outputText style="font-size: smaller;" value="SPID Operator Code" />
<p:inputText id="Code" value="#{sBean.selectedCode}" required="true" />
</h:panelGrid>
<p:commandButton value="Save" actionListener="#{sBean.save(actionEvent)}"
oncomplete="handleDialog('spidDialog', args,add);"
update="editOperatorTabForm:Div growl editOperatorTabForm:Table"/>
<p:commandButton value="Cancel" onclick="add.hide();" immediate="true"/>
</h:form>
</p:dialog>
The action #{sBean.save(actionEvent)} causes a NullPointerException but it should not be called during initialization. It is being called without any user interaction, should that be the case?
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对于
actionListener，此表达式语法不正确。它被评估为值表达式而不是方法表达式。您需要删除(actionEvent)部分。This expression syntax is incorrect for an
actionListener. It is been evaluated as a value expression instead of a method expression. You need to remove the(actionEvent)part.