确认对话框中的PrimeFaces命令按钮没有调用后备bean

我有一个PrimeFaces数据表，它显示一组用户，每一行都有一个要删除的commandLink。当单击链接时，出现一个带有"Yes"按钮的confirmDialog，该按钮应该调用后台bean中的"delete"方法。不幸的是，这个方法没有被调用，对话框只是被隐藏。链接中的参数已经设置，因为我在调试器中看到了它。

这是我的页面:

<?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">
<html 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://primefaces.org/ui">
<h:head><title>Manage users</title></h:head> 
<h:body>
<ui:composition template="../../template/commonLayout.xhtml">
    <ui:define name="content">
        <p:layoutUnit position="center">
            <h:form id="datatable">
                <p:tabView>
                    <p:tab title="Users">
                        <p:button value = "Add user" outcome="addUser.xhtml?faces-redirect=true"/>
                        <p:growl id="messages" showDetail="true"/>  
                        <p:dataTable id="usersTable" var="user" value="#{userMB.userList}" paginator="true" rows="25" 
                                     paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink}">
                            <p:ajax event="rowEdit" listener="#{userMB.onEditUser}"  />
                            <p:column headerText="First name">
                                <h:outputText value="#{user.firstName}" />  
                            </p:column> 
                            <p:column headerText="Last name">
                                <h:outputText value="#{user.lastName}" />  
                            </p:column> 
                            <p:column headerText="E-mail">
                                <h:outputText value="#{user.email}" />  
                            </p:column>
                            <p:column headerText="Username">
                                <h:outputText value="#{user.username}"/>
                            </p:column> 
                            <p:column headerText="Hire date">
                                <h:outputText value="#{user.hireDate}">
                                    <f:convertDateTime type="date" pattern="dd.MM.yyyy"/>
                                </h:outputText>  
                            </p:column>  
                            <p:column headerText="Working hours">
                                <h:outputText value="#{user.workingHours}" />  
                            </p:column>
                            <p:column headerText="Vacation days">
                                <h:outputText value="#{user.vacationDays}"/>
                            </p:column>
                            <p:column>
                                <h:link outcome="addUser" value="Edit">
                                    <f:param name="userID" value="#{user.id}" />
                                </h:link>
                            </p:column>
                            <p:column>
                                <p:commandLink value="Delete" onclick="deleteConfirmDlg.show()">
                                    <f:setPropertyActionListener value="#{user}" target="#{userMB.currentUser}" />
                                </p:commandLink>
                            </p:column>                             
                        </p:dataTable>
                        <p:confirmDialog id="deleteConfirmDialog" message="Are you sure?" header="Delete user" severity="alert" widgetVar="deleteConfirmDlg" appendToBody="true">
                            <p:commandButton id="confirmDelete" value="Yes" oncomplete="deleteConfirmDlg.hide()" update="usersTable" actionListener="#{userMB.deleteUser}"/>
                            <p:commandButton id="declineDelete" value="No" onclick="deleteConfirmDlg.hide()" type="button"/>
                        </p:confirmDialog>
                    </p:tab>
                    <p:tab title="Teams">
                        <p:button value = "Add team" outcome="addTeam.xhtml?faces-redirect=true"/>
                        <p:dataTable var="team" value="#{userMB.teamList}" paginator="true" rows="25"
                            paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink}">
                            <p:column headerText="Name">
                                <h:outputText value="#{team.name}" />  
                            </p:column>
                            <p:column headerText="Team leader">
                                <h:outputText value="#{team.teamLeader.displayName}" />  
                            </p:column>
                        </p:dataTable>
                    </p:tab>
                </p:tabView>
            </h:form>
    </p:layoutUnit>
    </ui:define>
</ui:composition>

支持bean方法:

public void deleteUser(ActionEvent event) {
    if (null != currentUser) {
        // check if userID is set and delete
        System.out.println("delete user with id " + currentUser.getId());
        userService.deleteUser(currentUser);
        currentUser = new User();
    }
}

我检查了，我没有嵌套的形式，因为这是支持bean不被调用的最常见的情况…

以下是我的模板文件:

CommonLayout.xhtml

<?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">
<html 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://primefaces.org/ui">
 <h:head>
<h:outputStylesheet library="css" name="default.css"  />
</h:head>  
<h:body>
<p:layout fullPage="true">
<div id ="header">
<ui:insert name="header">
    <ui:include src="commonHeader.xhtml"></ui:include>
</ui:insert>
 </div>
 <div id="left-menu">
<ui:insert name="left-menu">
    <ui:include src="leftMenu.xhtml"></ui:include>
</ui:insert>
 </div>
 <div id ="content">
<ui:insert name="content">
    <ui:include src="commonContent.xhtml"></ui:include>
</ui:insert>
 </div>
</p:layout>
</h:body>
</html>

CommonHeader.xhtml:

<?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">
<html 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://primefaces.org/ui">
<h:head>
</h:head>  
<h:body>
    <ui:composition>
        <p:layoutUnit position="north" size="100">
            <h:outputText value="Welcome #{request.remoteUser}!"/> <br />
            <a href="#{request.contextPath}/j_spring_security_logout">Logout</a><br />
        </p:layoutUnit>
    </ui:composition>
</h:body>
</html>

CommonContent.xhtml:

<?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">
<html 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://primefaces.org/ui">
<h:head>
</h:head>  
<h:body>
    <ui:composition>
        <p:layoutUnit position="center">
                <ui:include src="../widgets/schedule.xhtml"/>
        </p:layoutUnit>
    </ui:composition>
</h:body>
</html>

LeftMenu.xhtml:

<?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">
<html 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://primefaces.org/ui">
<h:head>
</h:head>  
<h:body>
    <ui:composition>
        <p:layoutUnit position="west" size="200">
        <h:form>
            <p:menu width="100%" rendered="#{request.isUserInRole('ROLE_MANAGER')}">
                <p:submenu label="Management">
                    <p:menuitem value="Manage users" outcome="/pages/management/manageUsers.xhtml?faces-redirect=true"></p:menuitem>
                </p:submenu>
            </p:menu>
            </h:form>
    </p:layoutUnit>
    </ui:composition>
</h:body>
</html>

我使用的是PrimeFaces 3.4和JSF 2.0

在DOM就绪时，<p:confirmDialog ... appendToBody="true">将导致确认对话框的HTML表示被JavaScript重新定位到HTML <body>元素的末尾。

但是这会导致确认对话框的HTML表示不再位于任何表单中。因此，实际上没有提交任何表单，也没有发送任何请求参数，因此JSF将无法识别操作。

你需要给确认对话框它自己的<h:form>。

<p:confirmDialog ...>
    <h:form>
        ...
    </h:form>
</p:confirmDialog>

并且为了避免在维护期间的混乱(嵌套表单是非法的)，我还建议将该组件移动到模板的末尾，至少在"外部"<h:form>之后

。

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