Primefaces DefaultTreeNode 到 TreeNode 的转换问题
Primefaces DefaultTreeNode to TreeNode conversion issue
我正在尝试使用 Primefaces TreeNode 实现侧边导航菜单。我试图在我的项目中使用这个示例，但使用 javax 注释而不是 JSF。
在 PrimeFaces 6.0 中使用 Mojarra 2.2.12-jbossorg-2
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] (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
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);
}
}
}
这是导航树
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
<!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>
完整的堆栈跟踪
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[=13=]0(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler.handleRequest(ServletInitialHandler.java:175)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange.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，但没有发现任何从 DefaultTreeNode 到 TreeNode 会出现问题的原因
我怀疑这些注释，但不确定如何修复或遗漏了什么。感谢任何帮助。
谢谢，
阿维纳什
正如问题评论中所建议的，发生错误是因为您有两个不同的 class 加载器加载相同的 class，这里是帮助解决问题的帖子
- two different classloaders
- multiple different versioned PrimeFaces JAR files
我正在尝试使用 Primefaces TreeNode 实现侧边导航菜单。我试图在我的项目中使用这个示例，但使用 javax 注释而不是 JSF。
在 PrimeFaces 6.0 中使用 Mojarra 2.2.12-jbossorg-2
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] (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
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);
}
}
}
这是导航树
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
<!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>
完整的堆栈跟踪
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[=13=]0(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler.handleRequest(ServletInitialHandler.java:175)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange.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，但没有发现任何从 DefaultTreeNode 到 TreeNode 会出现问题的原因
我怀疑这些注释，但不确定如何修复或遗漏了什么。感谢任何帮助。
谢谢， 阿维纳什
正如问题评论中所建议的，发生错误是因为您有两个不同的 class 加载器加载相同的 class，这里是帮助解决问题的帖子
- two different classloaders
- multiple different versioned PrimeFaces JAR files