Primefaces DefaultTreeNode to TreeNode转换问题

时间：2017-04-18 20:17:13

标签： jsf-2 maven-3 classloader treenode

我正在尝试使用Primefaces TreeNode实现我的侧面导航菜单。我试图在我的项目中使用此示例，但使用javax注释而不是JSF。

将Mojarra 2.2.12-jbossorg-2与PrimeFaces 6.0一起使用

但是当我运行我的应用程序时，我得到以下异常

  

SEVERE [javax.enterprise.resource.webcontainer.jsf.application]（默认任务-8）错误渲染视图[/views/home.xhtml]：javax.el.E​​LException：/ views / common / navigation / navigation- menu.xhtml @ 12,41 value =＆＃34;＃{navTree.root}＆＃34;：java.lang.IllegalArgumentException：无法将类型为org.primefaces.model.DefaultTreeNode的类型的菜单转换为接口org.primefaces.model .TreeNode 

import java.io.Serializable;

import javax.enterprise.context.SessionScoped;
import javax.inject.Named;

import org.primefaces.model.DefaultTreeNode;
import org.primefaces.model.TreeNode;

@Named("bcService")
@SessionScoped
public class BreadCrumbService implements Serializable {

    private static final long serialVersionUID = 1L;

    @SuppressWarnings("unused")
    public TreeNode createDocuments() {
        TreeNode root = new DefaultTreeNode(new Document("Menu", "root"), null);
        // Home
        TreeNode home = new DefaultTreeNode(new Document("Home", "home"), root);

        // Admin
        TreeNode admin = new DefaultTreeNode(new Document("Admin", "home"), home);
        TreeNode staff = new DefaultTreeNode("document", new Document("Staff", "home"), admin);
        TreeNode news = new DefaultTreeNode("document", new Document("News", "home"), admin);
        TreeNode availability = new DefaultTreeNode("document", new Document("Availability", "home"), admin);
        TreeNode printService = new DefaultTreeNode("document", new Document("PrintService", "home"), admin);
        TreeNode referenceDataCommon = new DefaultTreeNode("document", new Document("Reference Data Common", "home"), admin);

        // Billing
        TreeNode billing = new DefaultTreeNode(new Document("Billing", "home"), home);
        TreeNode initiateBilling = new DefaultTreeNode("document",new Document("Initiate Billing", "home"), billing);
        TreeNode billingMaintenance = new DefaultTreeNode("document",new Document("Billing Maintenance", "home"), billing);
        TreeNode viewBilling = new DefaultTreeNode("document", new Document("View Billing", "home"), billing);

        collapsingOrExpanding(home, true);
        return root;
    }

    public void collapsingOrExpanding(TreeNode n, boolean option) {
        if(n.getChildren().size() == 0) {
            n.setSelected(false);
        }
        else {
            for(TreeNode s: n.getChildren()) {
                collapsingOrExpanding(s, option);
            }
            n.setExpanded(option);
            n.setSelected(false);
        }
    }
}

这是NavigationTree 

import javax.annotation.PostConstruct;
import javax.enterprise.context.SessionScoped;
import javax.inject.Inject;
import javax.inject.Named;

import org.primefaces.model.TreeNode;

@Named("navTree")
@SessionScoped
public class NavigationTree implements Serializable {

    private static final long serialVersionUID = 1L;
    private TreeNode root;
    private TreeNode selectedNode;

    @Inject @Named("bcService")
    private BreadCrumbService service;

    @PostConstruct
    public void init() {
        root = service.createDocuments();
    }

    public void setService(BreadCrumbService service) {
        this.service = service;
    }

    public TreeNode getRoot() {
        return root;
    }

    public TreeNode getSelectedNode() {
        return selectedNode;
    }

    public void setSelectedNode(TreeNode selectedNode) {
        this.selectedNode = selectedNode;
    }
}

和JSF视图

＆＃13;
＆＃13; 
<!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:c="http://java.sun.com/jstl/core"
	xmlns:p="http://primefaces.org/ui"
	xmlns:pe="http://primefaces.org/ui/extensions" xml:lang="en" lang="en">

	<h:form>
		<p:tree value="#{navTree.root}" var="doc" selectionMode="single" 
			selection="#{navTree.selectedNode}" >
			<p:treeNode expandedIcon="fa fa-folder-open"
				collapsedIcon="fa fa-folder">
				<h:outputText value="#{doc.name}" />
			</p:treeNode>
			<p:treeNode type="document" icon="fa fa-file-text-o fileColor">
				<h:outputText value="#{doc.name}" />
			</p:treeNode>
		</p:tree>
	</h:form>
</ui:composition>
＆＃13;
＆＃13;
＆＃13;

完成堆栈跟踪

14:36:15,311 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (default task-8) Error Rendering View[/views/home.xhtml]: javax.el.ELException: /views/common/navigation/navigation-menu.xhtml @12,41 value="#{navTree.root}": java.lang.IllegalArgumentException: Cannot convert Menu of type class org.primefaces.model.DefaultTreeNode to interface org.primefaces.model.TreeNode
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:114)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
    at org.primefaces.component.api.UITree.getValue(UITree.java:157)
    at org.primefaces.component.tree.TreeRenderer.encodeMarkup(TreeRenderer.java:234)
    at org.primefaces.component.tree.TreeRenderer.encodeEnd(TreeRenderer.java:191)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:920)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1863)
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:890)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:458)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:134)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
    at org.apache.deltaspike.jsf.impl.listener.request.DeltaSpikeLifecycleWrapper.render(DeltaSpikeLifecycleWrapper.java:111)
    at javax.faces.lifecycle.LifecycleWrapper.render(LifecycleWrapper.java:92)
    at org.apache.deltaspike.jsf.impl.listener.request.JsfClientWindowAwareLifecycleWrapper.render(JsfClientWindowAwareLifecycleWrapper.java:160)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:659)
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
    at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
    at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:285)
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:792)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.el.ELException: java.lang.IllegalArgumentException: Cannot convert Menu of type class org.primefaces.model.DefaultTreeNode to interface org.primefaces.model.TreeNode
    at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:87)
    at javax.el.ELContext.convertToType(ELContext.java:473)
    at com.sun.el.lang.EvaluationContext.convertToType(EvaluationContext.java:166)
    at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:229)
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    ... 50 more
Caused by: java.lang.IllegalArgumentException: Cannot convert Menu of type class org.primefaces.model.DefaultTreeNode to interface org.primefaces.model.TreeNode
    at com.sun.el.lang.ELSupport.coerceToType(ELSupport.java:428)
    at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:85)
    ... 56 more

我查看了PrimeFaces 6.0 API并且没有看到任何原因导致它从DefaultTreeNode到TreeNode的问题

我怀疑注释，但不确定如何修复或我缺少什么。任何帮助表示赞赏。

谢谢， 阿维纳什

1 个答案:

答案 0 :(得分：0)

正如问题的评论中所建议的，错误正在发生，因为你有两个不同的类加载器加载同一个类，这里​​有帮助解决问题的帖子

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