在 WildFly 21 上无法使用 JSF 2.2 访问 CDI 支持 Bean

问题描述 投票：0回答：2

我一直在按照 this 教程在 Windows 10 上的 Wildfly-21.0 服务器上使用 JAVA-14 和 Maven 在 Eclipse 版本 2020-09 (4.17.0) 上设置 JSF。完成页面上的说明后，我可以浏览到我的 index.xhtml 页面，但是当我提交表单时我无法访问支持 bean。我收到以下错误：

[javax.enterprise.resource.webcontainer.jsf.context] (default task-1) javax.el.PropertyNotFoundException: /index.xhtml @14,61 value="#{bean.input}": Target Unreachable, identifier 'bean' resolved to null: javax.el.PropertyNotFoundException: /index.xhtml @14,61 value="#{bean.input}": Target Unreachable, identifier 'bean' resolved to null
at [email protected]//com.sun.faces.facelets.el.TagValueExpression.getType(TagValueExpression.java:64)
at [email protected]//com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:71)
at [email protected]//javax.faces.component.UIInput.getConvertedValue(UIInput.java:1110)
at [email protected]//javax.faces.component.UIInput.validate(UIInput.java:1011)
at [email protected]//javax.faces.component.UIInput.executeValidate(UIInput.java:1322)
at [email protected]//javax.faces.component.UIInput.processValidators(UIInput.java:733)
at [email protected]//javax.faces.component.UIForm.processValidators(UIForm.java:229)
at [email protected]//com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:608)
at [email protected]//com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:159)
at [email protected]//javax.faces.component.UIComponent.visitTree(UIComponent.java:1456)
at [email protected]//javax.faces.component.UIForm.visitTree(UIForm.java:355)
at [email protected]//javax.faces.component.UIComponent.visitTree(UIComponent.java:1468)
at [email protected]//javax.faces.component.UIComponent.visitTree(UIComponent.java:1468)
at [email protected]//com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:400)
at [email protected]//com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:261)
at [email protected]//javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1308)
at [email protected]//com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:53)
at [email protected]//com.sun.faces.lifecycle.Phase.doPhase(Phase.java:76)
at [email protected]//com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:177)
at [email protected]//javax.faces.webapp.FacesServlet.executeLifecyle(FacesServlet.java:707)
at [email protected]//javax.faces.webapp.FacesServlet.service(FacesServlet.java:451)
at [email protected]//io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at [email protected]//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at io.opentracing.contrib.opentracing-jaxrs2//io.opentracing.contrib.jaxrs2.server.SpanFinishingFilter.doFilter(SpanFinishingFilter.java:52)
at [email protected]//io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at [email protected]//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at [email protected]//io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at [email protected]//io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at [email protected]//io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
at [email protected]//io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at [email protected]//org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at [email protected]//io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
at [email protected]//io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
at [email protected]//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at [email protected]//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at [email protected]//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at [email protected]//io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at [email protected]//io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at [email protected]//io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at [email protected]//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at [email protected]//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at [email protected]//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
at [email protected]//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
at [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
at [email protected]//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at [email protected]//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at [email protected]//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
at [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
at [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
at [email protected]//io.undertow.server.Connectors.executeRootHandler(Connectors.java:387)
at [email protected]//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:841)
at [email protected]//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at [email protected]//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
at [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
at [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
at [email protected]//org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1280)
at java.base/java.lang.Thread.run(Thread.java:832)

Caused by: javax.el.PropertyNotFoundException: Target Unreachable, identifier 'bean' resolved to null
at [email protected]//com.sun.el.parser.AstValue.getTarget(AstValue.java:148)
at [email protected]//com.sun.el.parser.AstValue.getType(AstValue.java:62)
at [email protected]//com.sun.el.ValueExpressionImpl.getType(ValueExpressionImpl.java:160)
at [email protected]//org.jboss.weld.module.web.el.WeldValueExpression.getType(WeldValueExpression.java:93)
at [email protected]//org.jboss.weld.module.web.el.WeldValueExpression.getType(WeldValueExpression.java:93)
at [email protected]//com.sun.faces.facelets.el.TagValueExpression.getType(TagValueExpression.java:62)
... 70 more

在 Eclipse 我的项目属性中，“Project Facets”我无法将 JavaServer Faces 版本设置为 2.3，因为我收到“无法将项目 Facet JavaServer Faces 版本更改为 2.3”。所以我选择了2.2版本。根据 this 堆栈溢出帖子，我的 CDI 实现可能有问题。

关于如何解决此问题并继续前进有什么建议吗？

提前致谢！

我的POM文件：

<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>tanvir.project</groupId>
<artifactId>SudokuSolver</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Sudoku Solver</name>
<description>Webapp for solving sudoku puzzles</description>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <maven.compiler.source>14</maven.compiler.source>
    <maven.compiler.target>14</maven.compiler.target>
    <failOnMissingWebXml>false</failOnMissingWebXml>
</properties>

<dependencies>
    <dependency>
        <groupId>jakarta.platform</groupId>
        <artifactId>jakarta.jakartaee-api</artifactId>
        <version>9.0.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

我的WEB-INF/beans.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
                             http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
    version="1.1" bean-discovery-mode="all">
</beans>

我的WEB-INF/faces-config.xml：

<?xml version="1.0" encoding="UTF-8"?>
<faces-config xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
    version="2.2">
    <!-- JSF configuration here. -->
</faces-config>

我的支持豆：

package tanvir.project.sudoku;

import jakarta.enterprise.context.RequestScoped;
import jakarta.inject.Named;

@Named
@RequestScoped
public class Bean {
    private String input;
    private String output;

    public void submit() {
        output = "Hello World! You have typed: " + input;
    }

    public String getInput() {
        return input;
    }

    public void setInput(String input) {
        this.input = input;
    }

    public String getOutput() {
        return output;
    }
}

最后是我的xhtml文件：

<!DOCTYPE html>
<html lang="en"
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:f="http://xmlns.jcp.org/jsf/core"
    xmlns:h="http://xmlns.jcp.org/jsf/html"
>
    <h:head>
        <title>Hello World</title>
    </h:head>
    <h:body>
        <h1>Hello World</h1>
        <h:form>
            <h:outputLabel for="input" value="Input" />
            <h:inputText id="input" value="#{bean.input}" />
            <h:commandButton value="Submit" action="#{bean.submit}">
                <f:ajax execute="@form" render=":output" />
            </h:commandButton>
        </h:form>
        <h:outputText id="output" value="#{bean.output}" />
    </h:body>
</html>
eclipse maven jsf wildfly cdi
2个回答
1
投票

我没有像教程中提到的那样使用 jakarta.jakartaee-api 版本 8.0.0，而是使用版本 9.0.0。这需要我在 Bean.java 中导入 jakarta.inject.Named 而不是 javax.inject.Named 来使用 @Named 注释。当我在 POM 文件中将 jakarta.jakartaee-api 版本设置为 8.0.0 时，问题得到解决（现在可以使用 EL 语句引用支持 bean）。

0
投票

我目前面临将 JSF 2.2 Maven Web 应用程序从 JDK 8 迁移到 Java 11 的挑战。我的目标是维持 Javax 包的使用，而不重构到 Jakarta。

解决了几个构建和部署问题后，该应用程序成功部署在WildFly 19上。但是，在第一次交互时，我遇到了以下错误：

引起：javax.el.PropertyNotFoundException：目标无法访问，标识符“XXXMBean”解析为 null 在 [电子邮件受保护]//com.sun.el.parser.AstValue.getTarget(AstValue.java:148) 在 [电子邮件受保护]//com.sun.el.parser.AstValue.getType(AstValue.java:62) 在 [电子邮件受保护]//com.sun.el.ValueExpressionImpl.getType(ValueExpressionImpl.java:160) 在 [电子邮件受保护]//org.jboss.weld.module.web.el.WeldValueExpression.getType(WeldValueExpression.java:93)

鉴于此背景，我有两个问题：

  1. 在 Java 11 上运行时继续使用 javax 是否可行，还是必须切换到 jakarta？
  2. 我可以采取哪些步骤来解决有关 XXXMBean 标识符的 PropertyNotFoundException 问题？

感谢您的任何见解！

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