PrimeFaces清除提交表单时的文本字段

Question

我有一个注册表格的代码.<p:commandButton>.当我提交按钮时,有一些字段和类型为现在的提交按钮,它在表单下显示一个数据表,用于呈现输入字段的值.我想在表单提交后清除输入文本字段.但价值仍然存在.如何清除表单文本字段的值？

<p:panel header="Registration Form" closable="true" closeSpeed="100" toggleable="true" toggleSpeed="100" toggleOrientation="vertical">
            <h:panelGrid columns="2" cellpadding="5">
                <p:outputLabel value="*First Name"/>
                <p:inputText id="firstname" value="#{registrationDetails.firstName}" required="true" label="First Name" requiredMessage="First Name required!"/>

                <p:outputLabel value="*Last Name"/>
                <p:inputText id="lastname" value="#{registrationDetails.lastName}" required="true" label="Last Name" requiredMessage="Last Name required!"/>

                <p:outputLabel value="Location"/>
                <p:selectOneMenu id="location" value="#{registrationDetails.location}">
                    <f:selectItem itemLabel="Select Location" itemValue=""/>
                    <f:selectItems value="#{registrationDetails.locations}"/>
                </p:selectOneMenu>

                <p:outputLabel id="email" value="*Email"/>
                <p:inputText value="#{registrationDetails.email}" required="true" label="Email" requiredMessage="Email address required!"/>

                <p:outputLabel value="*Contact Number"/>
                <p:inputText id="contactNumber" value="#{registrationDetails.contactNumber}" autocomplete="false" maxlength="10" required="true" label="Contact Number" requiredMessage="Contact Number required!"/>

                <p:outputLabel value="Address"/>
                <p:inputTextarea value="#{registrationDetails.address}"/>
            </h:panelGrid>
<p:commandButton  value="Submit" actionListener="#{registrationDetails.formSubmit}" id="buttonSubmit" 
                        update="form:msg form:regDetailPanel form:regData" ajax="true">
                <f:attribute name="fname" value="#{registrationDetails.firstName}"/>
                <f:attribute name="lname" value="#{registrationDetails.lastName}"/>
                <f:attribute name="loc" value="#{registrationDetails.location}"/>
                <f:attribute name="email" value="#{registrationDetails.email}"/>
                <f:attribute name="contact" value="#{registrationDetails.contactNumber}"/>
                <f:attribute name="address" value="#{registrationDetails.address}"/>
                <p:ajax event="click" immediate="true" update="form:regDetailPanel form:regData"/>
            </p:commandButton>

Answer 1

您必须清除辅助bean中的值,以便"#{registrationDetails.firstName}"等值表达式返回null或空字符串.即在Java代码中,在注册成功后将所有必须清除的值设置为null.

这必须在actionListener"#{registrationDetails.formSubmit}"中的某个地方完成.

当您使用AJAX时,您必须确保在成功调用ajax之后更新带有文本字段的JSF页面部分.