JSF-Ajax调用-这段代码有什么错?

JSF-Ajax调用-这段代码有什么错?,ajax,jsf,jsf-2,javabeans,Ajax,Jsf,Jsf 2,Javabeans,我认为解决此问题的最佳方法就是粘贴我的代码: 选择器bean @ManagedBean(name="selector") @RequestScoped public class Selector { @ManagedProperty(value="#{param.page}") private String page; private String profilePage; @PostConstruct public void init() {

我认为解决此问题的最佳方法就是粘贴我的代码:

选择器bean

@ManagedBean(name="selector")
@RequestScoped
public class Selector {
    @ManagedProperty(value="#{param.page}")
    private String page;
    private String profilePage;

    @PostConstruct
    public void init() {
        if(profilePage==null || profilePage.trim().isEmpty()) {
            this.profilePage="main";
        }

        if(page==null || page.trim().isEmpty()) {
            this.page="homepage";
        }
    }

    public String getProfilePage() { System.out.println("GET ="+profilePage); return profilePage; }
    public void setProfilePage(String profilePage) { this.profilePage=profilePage; }

    public String getPage() { return page; }
    public void setPage(String page) { this.page=page; }
}    
@ManagedBean
@ViewScoped
public class ProfileSelector {
    private String profilePage;

    @PostConstruct
    public void init() {
        if(profilePage==null || profilePage.trim().isEmpty()) {
            this.profilePage="main";
        }
    }

    public String getProfilePage() { return profilePage; }
    public void setProfilePage(String profilePage) { this.profilePage=profilePage; }
}
profile.xhtml

<h:panelGroup layout="block" id="profileContent">
    <h:panelGroup rendered="#{selector.profilePage=='main'}">
        <ui:include src="/profile/profile_main.xhtml" />
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <ui:include src="/profile/profile_edit.xhtml" />
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileEditContent">
    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <h:form id="formProfileEdit" prependId="false">
            <h:panelGroup layout="block">
                <h:outputScript name="jsf.js" library="javax.faces" target="head" />

                <h:outputLabel value="EDIT" />

                <h:panelGroup layout="block">
                    <h:commandButton value="Confirm Edit">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="editConfirm" />
                        <f:ajax event="action" render=":profileEditContent"/>
                    </h:commandButton>

                    <h:commandButton value="Back">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="main" />
                        <f:ajax event="action" render=":profileEdit"/>
                    </h:commandButton>
                </h:panelGroup>
            </h:panelGroup>
        </h:form>
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY IM HERE" />
    </h:panelGroup>
</h:panelGroup>           
<h:panelGroup layout="block" id="profileContent">
    <h:form id="formProfile" prependId="false">
        <h:outputScript name="jsf.js" library="javax.faces" target="head" />

        <h:panelGroup rendered="#{profileSelector.profilePage=='main'}">
            <ui:include src="/profile/profile_main.xhtml" />
        </h:panelGroup>

        <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
            <ui:include src="/profile/profile_edit.xhtml" />
        </h:panelGroup>
    </h:form>
</h:panelGroup>
<h:panelGroup layout="block">            
    <h:outputLabel value="MAIN" />

    <h:panelGroup layout="block">
        <h:commandButton value="Edit Button">
            <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="edit" />
            <f:ajax event="action" render=":profileContent"/>
        </h:commandButton>
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileContentEdit">
    <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
        <h:panelGroup layout="block">                
            <h:outputLabel value="EDIT" />

            <h:panelGroup layout="block" styleClass="profilo_3">
                <h:commandButton value="Confirm Edit">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="editConfirm" />
                    <f:ajax event="action" render=":profileContentEdit"/>
                </h:commandButton>

                <h:commandButton value="Back">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="main" />
                    <f:ajax event="action" render=":profileContent"/>
                </h:commandButton>
            </h:panelGroup>
        </h:panelGroup>
    </h:panelGroup>

    <h:panelGroup rendered="#{profileSelector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY Im HERE" />
    </h:panelGroup>
</h:panelGroup>
profile\u edit.xhtml

<h:panelGroup layout="block" id="profileContent">
    <h:panelGroup rendered="#{selector.profilePage=='main'}">
        <ui:include src="/profile/profile_main.xhtml" />
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <ui:include src="/profile/profile_edit.xhtml" />
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileEditContent">
    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <h:form id="formProfileEdit" prependId="false">
            <h:panelGroup layout="block">
                <h:outputScript name="jsf.js" library="javax.faces" target="head" />

                <h:outputLabel value="EDIT" />

                <h:panelGroup layout="block">
                    <h:commandButton value="Confirm Edit">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="editConfirm" />
                        <f:ajax event="action" render=":profileEditContent"/>
                    </h:commandButton>

                    <h:commandButton value="Back">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="main" />
                        <f:ajax event="action" render=":profileEdit"/>
                    </h:commandButton>
                </h:panelGroup>
            </h:panelGroup>
        </h:form>
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY IM HERE" />
    </h:panelGroup>
</h:panelGroup>           
<h:panelGroup layout="block" id="profileContent">
    <h:form id="formProfile" prependId="false">
        <h:outputScript name="jsf.js" library="javax.faces" target="head" />

        <h:panelGroup rendered="#{profileSelector.profilePage=='main'}">
            <ui:include src="/profile/profile_main.xhtml" />
        </h:panelGroup>

        <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
            <ui:include src="/profile/profile_edit.xhtml" />
        </h:panelGroup>
    </h:form>
</h:panelGroup>
<h:panelGroup layout="block">            
    <h:outputLabel value="MAIN" />

    <h:panelGroup layout="block">
        <h:commandButton value="Edit Button">
            <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="edit" />
            <f:ajax event="action" render=":profileContent"/>
        </h:commandButton>
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileContentEdit">
    <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
        <h:panelGroup layout="block">                
            <h:outputLabel value="EDIT" />

            <h:panelGroup layout="block" styleClass="profilo_3">
                <h:commandButton value="Confirm Edit">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="editConfirm" />
                    <f:ajax event="action" render=":profileContentEdit"/>
                </h:commandButton>

                <h:commandButton value="Back">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="main" />
                    <f:ajax event="action" render=":profileContent"/>
                </h:commandButton>
            </h:panelGroup>
        </h:panelGroup>
    </h:panelGroup>

    <h:panelGroup rendered="#{profileSelector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY Im HERE" />
    </h:panelGroup>
</h:panelGroup>
profile.xhtml

<h:panelGroup layout="block" id="profileContent">
    <h:panelGroup rendered="#{selector.profilePage=='main'}">
        <ui:include src="/profile/profile_main.xhtml" />
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <ui:include src="/profile/profile_edit.xhtml" />
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileEditContent">
    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <h:form id="formProfileEdit" prependId="false">
            <h:panelGroup layout="block">
                <h:outputScript name="jsf.js" library="javax.faces" target="head" />

                <h:outputLabel value="EDIT" />

                <h:panelGroup layout="block">
                    <h:commandButton value="Confirm Edit">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="editConfirm" />
                        <f:ajax event="action" render=":profileEditContent"/>
                    </h:commandButton>

                    <h:commandButton value="Back">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="main" />
                        <f:ajax event="action" render=":profileEdit"/>
                    </h:commandButton>
                </h:panelGroup>
            </h:panelGroup>
        </h:form>
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY IM HERE" />
    </h:panelGroup>
</h:panelGroup>           
<h:panelGroup layout="block" id="profileContent">
    <h:form id="formProfile" prependId="false">
        <h:outputScript name="jsf.js" library="javax.faces" target="head" />

        <h:panelGroup rendered="#{profileSelector.profilePage=='main'}">
            <ui:include src="/profile/profile_main.xhtml" />
        </h:panelGroup>

        <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
            <ui:include src="/profile/profile_edit.xhtml" />
        </h:panelGroup>
    </h:form>
</h:panelGroup>
<h:panelGroup layout="block">            
    <h:outputLabel value="MAIN" />

    <h:panelGroup layout="block">
        <h:commandButton value="Edit Button">
            <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="edit" />
            <f:ajax event="action" render=":profileContent"/>
        </h:commandButton>
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileContentEdit">
    <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
        <h:panelGroup layout="block">                
            <h:outputLabel value="EDIT" />

            <h:panelGroup layout="block" styleClass="profilo_3">
                <h:commandButton value="Confirm Edit">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="editConfirm" />
                    <f:ajax event="action" render=":profileContentEdit"/>
                </h:commandButton>

                <h:commandButton value="Back">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="main" />
                    <f:ajax event="action" render=":profileContent"/>
                </h:commandButton>
            </h:panelGroup>
        </h:panelGroup>
    </h:panelGroup>

    <h:panelGroup rendered="#{profileSelector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY Im HERE" />
    </h:panelGroup>
</h:panelGroup>
profile\u edit.xhtml

<h:panelGroup layout="block" id="profileContent">
    <h:panelGroup rendered="#{selector.profilePage=='main'}">
        <ui:include src="/profile/profile_main.xhtml" />
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <ui:include src="/profile/profile_edit.xhtml" />
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileEditContent">
    <h:panelGroup rendered="#{selector.profilePage=='edit'}">
        <h:form id="formProfileEdit" prependId="false">
            <h:panelGroup layout="block">
                <h:outputScript name="jsf.js" library="javax.faces" target="head" />

                <h:outputLabel value="EDIT" />

                <h:panelGroup layout="block">
                    <h:commandButton value="Confirm Edit">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="editConfirm" />
                        <f:ajax event="action" render=":profileEditContent"/>
                    </h:commandButton>

                    <h:commandButton value="Back">
                        <f:setPropertyActionListener target="#{selector.profilePage}" value="main" />
                        <f:ajax event="action" render=":profileEdit"/>
                    </h:commandButton>
                </h:panelGroup>
            </h:panelGroup>
        </h:form>
    </h:panelGroup>

    <h:panelGroup rendered="#{selector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY IM HERE" />
    </h:panelGroup>
</h:panelGroup>           
<h:panelGroup layout="block" id="profileContent">
    <h:form id="formProfile" prependId="false">
        <h:outputScript name="jsf.js" library="javax.faces" target="head" />

        <h:panelGroup rendered="#{profileSelector.profilePage=='main'}">
            <ui:include src="/profile/profile_main.xhtml" />
        </h:panelGroup>

        <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
            <ui:include src="/profile/profile_edit.xhtml" />
        </h:panelGroup>
    </h:form>
</h:panelGroup>
<h:panelGroup layout="block">            
    <h:outputLabel value="MAIN" />

    <h:panelGroup layout="block">
        <h:commandButton value="Edit Button">
            <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="edit" />
            <f:ajax event="action" render=":profileContent"/>
        </h:commandButton>
    </h:panelGroup>
</h:panelGroup>
<h:panelGroup layout="block" id="profileContentEdit">
    <h:panelGroup rendered="#{profileSelector.profilePage=='edit'}">
        <h:panelGroup layout="block">                
            <h:outputLabel value="EDIT" />

            <h:panelGroup layout="block" styleClass="profilo_3">
                <h:commandButton value="Confirm Edit">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="editConfirm" />
                    <f:ajax event="action" render=":profileContentEdit"/>
                </h:commandButton>

                <h:commandButton value="Back">
                    <f:setPropertyActionListener target="#{profileSelector.profilePage}" value="main" />
                    <f:ajax event="action" render=":profileContent"/>
                </h:commandButton>
            </h:panelGroup>
        </h:panelGroup>
    </h:panelGroup>

    <h:panelGroup rendered="#{profileSelector.profilePage=='editConfirm'}">
        <h:outputLabel value="FINALLY Im HERE" />
    </h:panelGroup>
</h:panelGroup>

嗯,这就复杂了。是否调用
ui命令
操作还取决于组件或其父级之一的
呈现
属性的结果。由于bean在请求范围内,
profilePage
在下一个请求中默认返回到
main
,因此编辑部分的
rendered
属性求值为
false
,因此编辑部分中的按钮不会调用任何操作。这一点在你的报告中得到了回答

理论上,标记bean
@ViewScoped
应该可以解决这个问题,因为它在后续视图中保留bean状态。然而,在您的特殊情况下,有两个问题妨碍它正常工作

首先,您使用的是一个
@ManagedProperty
,它引用了一个范围较短的值(
{param}
基本上是请求范围)。您需要将
profilePage
拆分为另一个bean,并将其标记为
@ViewScoped

其次,由于JSF2()中当前仍有一个未解决的bug,您的特定案例仍然无法工作,因为您有多个
处于不同的
呈现
状态,它们都连接到同一个bean。这种特殊情况将导致返回的响应中完全缺少
javax.faces.ViewState
。这将导致视图范围的bean被丢弃并重新创建(并且
profilePage
再次默认为
main
)。作为临时解决方法,您需要在
profile.xhtml
中将表单提取并合并为一个表单,作为第一个
的直接子级


更新:如果您唯一关心的是要将bean相互连接,则可以按如下方式拆分bean:

@ManagedBean
@RequestScoped
public class Selector {
    @ManagedProperty(value="#{param.page}")
    private String page;

    @ManagedProperty(value="#{profileSelector}")
    private ProfileSelector profileSelector;

    // ...
}
@ManagedBean
@ViewScoped
public class Selector {
    private String page;
    private String profilePage;

    @PostConstruct
    public void init() {
        page = FacesContext.getCurrentInstance().getRequestParameterMap().get("page");
    }

    // ...
}

然后,视图范围的bean可以通过这种方式在请求范围的bean中访问

或者,如果您真的想要一个bean,您也可以作为一种解决方法,替换
@ManagedProperty
,如下所示:

@ManagedBean
@RequestScoped
public class Selector {
    @ManagedProperty(value="#{param.page}")
    private String page;

    @ManagedProperty(value="#{profileSelector}")
    private ProfileSelector profileSelector;

    // ...
}
@ManagedBean
@ViewScoped
public class Selector {
    private String page;
    private String profilePage;

    @PostConstruct
    public void init() {
        page = FacesContext.getCurrentInstance().getRequestParameterMap().get("page");
    }

    // ...
}

哦。至少现在我明白了为什么它会在游行开始时创建带有“main”的组件树。我想我需要改变策略,因为我需要带有RequestScope:)的选择器bean。不幸的是,我没有看到任何其他方法可以用jsf实现带有ajax调用的dinamic菜单……你真的想要
@ViewScoped
。请参阅答案更新如何处理此问题。是的,我分成两个不同的bean(最佳可见性)。已尝试,但目前无法加载渲染的。我再试试!现在,我有两个豆子。我也只需要放一个全局表单?事实上,我不明白为什么它不能在多个渲染中处理多个表单:)是的,你需要有一个表单,它被放置在带有
渲染的
条件的部分之外,并且绑定到同一个bean。按照答案中的建议,将其放在
profile.xhtml
中。