我在Eclipse中使用Java Oracle 1.7构建的Tomcat7中部署webapp。UnsupportedClassVersionError在Tomcat中部署webapp 7
我收到这个错误，这似乎表明正在使用不同的Java版本。 但是当我运行java -version时，我得到了与编译版本相同版本的java版本“1.7.0_51”。
应该指出的是，这个Web应用程序在eclipse tomcat服务器nenvironment中工作正常，但在主tomcat安装中部署时似乎不起作用。
01-May-2014 00:37:46 org.apache.catalina.startup.HostConfig deployWAR INFO: Deploying web application archive /var/lib/tomcat7/webapps/prov.war log4j:WARN No appenders could be found for logger (org.jboss.resteasy.plugins.server.servlet.ConfigurationBootstrap). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 01-May-2014 00:37:47 org.apache.catalina.core.StandardContext listenerStart SEVERE: Exception sending context initialized event to listener instance of class org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap java.lang.UnsupportedClassVersionError: uk/co/alexjking/prov/ProvClustererWebApp/ClusterHandler : Unsupported major.minor version 51.0 (unable to load class uk.co.alexjking.prov.ProvClustererWebApp.ClusterHandler) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2840) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1160) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1668) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546) at org.jboss.resteasy.plugins.server.servlet.ConfigurationBootstrap.processScannedResources(ConfigurationBootstrap.java:384) at org.jboss.resteasy.plugins.server.servlet.ConfigurationBootstrap.createDeployment(ConfigurationBootstrap.java:181) at org.jboss.resteasy.plugins.server.servlet.ListenerBootstrap.createDeployment(ListenerBootstrap.java:32) at org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap.contextInitialized(ResteasyBootstrap.java:27) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:958) at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1599) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701) 01-May-2014 00:37:47 org.apache.catalina.core.StandardContext startInternal SEVERE: Error listenerStart 01-May-2014 00:37:47 org.apache.catalina.core.StandardContext startInternal SEVERE: Context [/prov] startup failed due to previous errors 01-May-2014 00:37:47 org.apache.catalina.core.StandardContext listenerStop SEVERE: Exception sending context destroyed event to listener instance of class org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap java.lang.NullPointerException at org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap.contextDestroyed(ResteasyBootstrap.java:37) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4819) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5466) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:958) at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1599) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701)
为了完整，该项目已经使用Maven构建并使用了Resteasy。
Tomcat正在使用<1.7 JRE –