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java - 无法使用托管 Bean 部署 JSF

转载 作者：行者123 更新时间：2023-12-01 12:01:37 26 4
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我对 JSF 非常陌生，并且仍在尝试运行基本应用程序以了解其工作原理。

我正在使用 JBoss AS 7 和 JSF 2.0(Mojarra 2.0.3-FCS)

首先，我创建了一个普通的应用程序，用于在页面上打印

<!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:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core">

<h:head>
</h:head>
<h:body>
    <h:outputLabel value="Hello World"></h:outputLabel>
</h:body>
</html>

它有效，我几乎可以理解所有内容。

在部署过程中，确实给出了两个警告

21:19:06,193 WARN  [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.faces.vendor.Tomcat6InjectionProvider:org.apache.catalina.util.DefaultAnnotationProcessor' for service type 'com.sun.faces.spi.injectionprovider'
21:19:06,195 WARN  [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.faces.vendor.Jetty6InjectionProvider:org.mortbay.jetty.plus.annotation.InjectionCollection' for service type 'com.sun.faces.spi.injectionprovider'

但不管它是如何工作的(不过，如果它能消失就好了)

<小时/>

开始出现问题的部分。

然后，我尝试使用托管 Bean，但它开始出现问题

所以我创建了一个 Bean

package org.demojsf.samples.beans;

import javax.annotation.ManagedBean;
import javax.enterprise.context.RequestScoped;

@ManagedBean ( value= "greet")
@RequestScoped
public  class GreetBean {
    public GreetBean(){

    }
    public String greet() {
        return "Greeting"   ;   
    }

}

请注意，我尝试了 @ManagedBean(name="greet") 但 eclipse 将其视为错误，并且它提供的修复是将其更改为值。因此值(value)就在那里

XHTML 代码类似于:

<!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:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core">

<h:head>
</h:head>
<h:body>
    <h:outputLabel value="#{greet.greet()}"></h:outputLabel>
</h:body>
</html>

然后它抛出了这个错误

21:30:44,992 WARN  [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.faces.vendor.Tomcat6InjectionProvider:org.apache.catalina.util.DefaultAnnotationProcessor' for service type 'com.sun.faces.spi.injectionprovider'
21:30:44,994 WARN  [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.faces.vendor.Jetty6InjectionProvider:org.mortbay.jetty.plus.annotation.InjectionCollection' for service type 'com.sun.faces.spi.injectionprovider'
21:30:45,321 INFO  [javax.enterprise.resource.webcontainer.jsf.config] (MSC service thread 1-1) Initializing Mojarra 2.1.7-jbossorg-1 (20120227-1401) for context '/third'
21:30:45,374 WARN  [org.jboss.modules] (MSC service thread 1-5) Failed to define class org.demojsf.samples.beans.GreetBean in Module "deployment.first.war:main" from Service Module Loader: java.lang.UnsupportedClassVersionError: org/demojsf/samples/beans/GreetBean : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.7.0_65]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800) [rt.jar:1.7.0_65]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) [rt.jar:1.7.0_65]
    at org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:327)
    at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:391)
    at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:243)
    at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:73)
    at org.jboss.modules.Module.loadModuleClass(Module.java:517)
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:182)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120)
    at java.lang.Class.forName0(Native Method) [rt.jar:1.7.0_65]
    at java.lang.Class.forName(Class.java:274) [rt.jar:1.7.0_65]
    at org.jboss.as.server.deployment.reflect.DeploymentClassIndex.classIndex(DeploymentClassIndex.java:54)
    at org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.processComponentConfig(InterceptorAnnotationProcessor.java:63) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.deploy(InterceptorAnnotationProcessor.java:55) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_65]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_65]

21:30:45,449 WARN  [org.jboss.modules] (MSC service thread 1-2) Failed to define class org.demojsf.samples.beans.GreetBean in Module "deployment.first.war:main" from Service Module Loader: java.lang.UnsupportedClassVersionError: org/demojsf/samples/beans/GreetBean : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.7.0_65]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800) [rt.jar:1.7.0_65]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) [rt.jar:1.7.0_65]
    at org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:327)
    at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:391)
    at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:243)
    at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:73)
    at org.jboss.modules.Module.loadModuleClass(Module.java:517)
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:182)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120)
    at java.lang.Class.forName0(Native Method) [rt.jar:1.7.0_65]
    at java.lang.Class.forName(Class.java:274) [rt.jar:1.7.0_65]
    at org.jboss.as.server.deployment.reflect.DeploymentClassIndex.classIndex(DeploymentClassIndex.java:54)
    at org.jboss.as.ee.component.deployers.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:79) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_65]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_65]

21:30:45,471 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-2) MSC00001: Failed to start service jboss.deployment.unit."first.war".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."first.war".INSTALL: Failed to process phase INSTALL of deployment "first.war"
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:119) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_65]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_65]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011030: Could not configure component greet
    at org.jboss.as.ee.component.deployers.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:92)
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
    ... 5 more
Caused by: java.lang.ClassNotFoundException: org.demojsf.samples.beans.GreetBean from [Module "deployment.first.war:main" from Service Module Loader]
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120)
    at java.lang.Class.forName0(Native Method) [rt.jar:1.7.0_65]
    at java.lang.Class.forName(Class.java:274) [rt.jar:1.7.0_65]
    at org.jboss.as.server.deployment.reflect.DeploymentClassIndex.classIndex(DeploymentClassIndex.java:54) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.as.ee.component.deployers.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:79)
    ... 6 more

21:30:46,740 INFO  [org.hibernate.validator.util.Version] (MSC service thread 1-1) Hibernate Validator 4.2.0.Final
21:30:47,002 INFO  [org.jboss.web] (MSC service thread 1-1) JBAS018210: Registering web context: /third
21:30:47,021 INFO  [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015870: Deploy of deployment "first.war" was rolled back with failure message {"JBAS014671: Failed services" => {"jboss.deployment.unit.\"first.war\".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"first.war\".INSTALL: Failed to process phase INSTALL of deployment \"first.war\""}}
21:30:47,026 INFO  [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015871: Deploy of deployment "third.war" was rolled back with no failure message
21:30:47,054 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-6) JBAS015877: Stopped deployment first.war in 30ms
21:30:47,078 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-5) JBAS015877: Stopped deployment third.war in 50ms
21:30:47,080 INFO  [org.jboss.as.controller] (DeploymentScanner-threads - 2) JBAS014774: Service status report
JBAS014777:   Services which failed to start:      service jboss.deployment.unit."first.war".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."first.war".INSTALL: Failed to process phase INSTALL of deployment "first.war"

21:30:47,082 ERROR [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) JBAS014654: Composite operation was rolled back
21:30:47,084 ERROR [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) {"JBAS014653: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-2" => {"JBAS014671: Failed services" => {"jboss.deployment.unit.\"first.war\".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"first.war\".INSTALL: Failed to process phase INSTALL of deployment \"first.war\""}}}}

最佳答案

问题是您正在使用 Java 8 编译代码，但应用程序服务器正在使用 Java 6/7 运行(取决于您的环境)。

在 Eclipse 中，请参阅 Changing the Java compiler version for a Java EE project .

Project Facet Java version in eclipse

<小时/>

试试这个:

package org.demojsf.samples.beans;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

@RequestScoped  
@ManagedBean(name = "greet")
public  class GreetBean {

    public String greet() {
        return "Greeting"   ;   
    }

}

关于java - 无法使用托管 Bean 部署 JSF，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27947450/

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