Unable to start the Tomcat server. Compiled using Java 1.7. Using JSF 2.0. Gives UnsupportedClassVersionError: com/sun/faces/config/FacesInitializer
Unable to start the Tomcat server. Compiled using Java 1.7. Using JSF 2.0. Gives UnsupportedClassVersionError: com/sun/faces/config/FacesInitializer
我有 java 之前运行的网络应用程序。我将其升级到 JDK 8，并使用 JDK 1.7 合规性设置编译了代码。但是，当我启动服务器时出现以下错误。我实际上删除了所有对 JDK 8 的引用并使用 JDK 7，但我仍然收到以下错误。
Apr 02, 2016 10:36:06 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.7.0_79\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\MySQL\MySQL Fabric 1.5 & MySQL Utilities 1.5\;C:\Program Files (x86)\MySQL\MySQL Fabric 1.5 & MySQL Utilities 1.5\Doctrine extensions for PHP\;C:\Program Files (x86)\Skype\Phone\;.
Apr 02, 2016 10:36:06 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:eEducation' did not find a matching property.
Apr 02, 2016 10:36:06 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Apr 02, 2016 10:36:06 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Apr 02, 2016 10:36:06 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 997 ms
Apr 02, 2016 10:36:06 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Apr 02, 2016 10:36:06 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52
Apr 02, 2016 10:36:09 AM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eEducation]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eEducation]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 6 more
Caused by: java.lang.UnsupportedClassVersionError: com/sun/faces/config/FacesInitializer : Unsupported major.minor version 52.0 (unable to load class com.sun.faces.config.FacesInitializer)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2948)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:274)
at org.apache.catalina.startup.WebappServiceLoader.loadServices(WebappServiceLoader.java:187)
at org.apache.catalina.startup.WebappServiceLoader.load(WebappServiceLoader.java:152)
at org.apache.catalina.startup.ContextConfig.processServletContainerInitializers(ContextConfig.java:1543)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1265)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:873)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:371)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5355)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Apr 02, 2016 10:36:09 AM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:731)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Apr 02, 2016 10:36:09 AM org.apache.catalina.startup.Catalina start
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:731)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 9 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
Apr 02, 2016 10:36:09 AM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]
我已经检查了我所有的构建路径和 JRE
我已经检查过 jsf-impl.jar 是否符合 Major 49 版本 (Java 1.5)。但是我得到的错误来自这个 jar
中的 class
Caused by: java.lang.UnsupportedClassVersionError: com/sun/faces/config/FacesInitializer : Unsupported major.minor version 52.0 (unable to load class com.sun.faces.config.FacesInitializer)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2948)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
所有的排列组合都试过了，还是不行。
附件是我项目的 JDK 设置的屏幕截图。
这是我的设置图片
编译器设置
我可以向您保证，我的 Tomcat 7.0 在 JRE 1.7 上也是 运行
（不幸的是，我不能 post 超过 2 个链接）
从您的 JAR 列表中，
- javax.faces-2.3.0-m04.jar
- jsf-api.jar
- jsf-impl.jar
假设jsf-impl.jar是用Java1.5编译的，那么这表明它是JSF 2.0。因此，您基本上是在同一个 Web 应用程序中混合使用 JSF 2.3（测试版）和 JSF 2.0。这是没有意义的。 JSF 2.3 使用 Java 1.8 编译，JSF 2.0 使用 Java 1.5 编译。根据您的例外情况，JSF 2.3 类 在类加载方面具有优先权，并且正在实际使用中。
删除 JSF 2.3 JAR 文件。
如果您在“修复”Java 版本后仍然继续运行，您迟早会遇到以下由混合多个不同版本的 JSF 库引起的问题之一：
- java.lang.IllegalStateException:Could not find backup for factory javax.faces.application.ApplicationFactory
- java.lang.IllegalStateException : Could not find backup for factory javax.faces.context.FacesContextFactory
- @ViewScoped calls @PostConstruct on every postback request
只是不要混用多个 JSF 库。
另请参阅：
我有 java 之前运行的网络应用程序。我将其升级到 JDK 8，并使用 JDK 1.7 合规性设置编译了代码。但是，当我启动服务器时出现以下错误。我实际上删除了所有对 JDK 8 的引用并使用 JDK 7，但我仍然收到以下错误。
Apr 02, 2016 10:36:06 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.7.0_79\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\MySQL\MySQL Fabric 1.5 & MySQL Utilities 1.5\;C:\Program Files (x86)\MySQL\MySQL Fabric 1.5 & MySQL Utilities 1.5\Doctrine extensions for PHP\;C:\Program Files (x86)\Skype\Phone\;.
Apr 02, 2016 10:36:06 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:eEducation' did not find a matching property.
Apr 02, 2016 10:36:06 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Apr 02, 2016 10:36:06 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Apr 02, 2016 10:36:06 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 997 ms
Apr 02, 2016 10:36:06 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Apr 02, 2016 10:36:06 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52
Apr 02, 2016 10:36:09 AM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eEducation]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eEducation]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 6 more
Caused by: java.lang.UnsupportedClassVersionError: com/sun/faces/config/FacesInitializer : Unsupported major.minor version 52.0 (unable to load class com.sun.faces.config.FacesInitializer)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2948)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:274)
at org.apache.catalina.startup.WebappServiceLoader.loadServices(WebappServiceLoader.java:187)
at org.apache.catalina.startup.WebappServiceLoader.load(WebappServiceLoader.java:152)
at org.apache.catalina.startup.ContextConfig.processServletContainerInitializers(ContextConfig.java:1543)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1265)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:873)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:371)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5355)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Apr 02, 2016 10:36:09 AM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:731)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Apr 02, 2016 10:36:09 AM org.apache.catalina.startup.Catalina start
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:731)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 9 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
Apr 02, 2016 10:36:09 AM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
Apr 02, 2016 10:36:09 AM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]
我已经检查了我所有的构建路径和 JRE
我已经检查过 jsf-impl.jar 是否符合 Major 49 版本 (Java 1.5)。但是我得到的错误来自这个 jar
中的 classCaused by: java.lang.UnsupportedClassVersionError: com/sun/faces/config/FacesInitializer : Unsupported major.minor version 52.0 (unable to load class com.sun.faces.config.FacesInitializer)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2948)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
所有的排列组合都试过了，还是不行。 附件是我项目的 JDK 设置的屏幕截图。
这是我的设置图片
编译器设置
我可以向您保证，我的 Tomcat 7.0 在 JRE 1.7 上也是 运行 （不幸的是，我不能 post 超过 2 个链接）
从您的 JAR 列表中，
- javax.faces-2.3.0-m04.jar
- jsf-api.jar
- jsf-impl.jar
假设jsf-impl.jar是用Java1.5编译的，那么这表明它是JSF 2.0。因此，您基本上是在同一个 Web 应用程序中混合使用 JSF 2.3（测试版）和 JSF 2.0。这是没有意义的。 JSF 2.3 使用 Java 1.8 编译，JSF 2.0 使用 Java 1.5 编译。根据您的例外情况，JSF 2.3 类 在类加载方面具有优先权，并且正在实际使用中。
删除 JSF 2.3 JAR 文件。
如果您在“修复”Java 版本后仍然继续运行，您迟早会遇到以下由混合多个不同版本的 JSF 库引起的问题之一：
- java.lang.IllegalStateException:Could not find backup for factory javax.faces.application.ApplicationFactory
- java.lang.IllegalStateException : Could not find backup for factory javax.faces.context.FacesContextFactory
- @ViewScoped calls @PostConstruct on every postback request
只是不要混用多个 JSF 库。