Question

以前可能会问过，但没有一个能解决我的问题

我已经创建了一个servlet，我想在tomcat7中托管它。 当我使用eclipse在tomcat7中运行它时，servlet运行正常（在服务器上运行）

echo $ CATALINA_HOME / usr / share / tomcat7

然而 webapp文件夹位于/ var / lib / tomcat7

我使用eclipse制作了一个war文件[ file-＆gt; export-＆gt; web-＆gt; war ]

ERROR

11 Sep, 2013 12:30:51 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
11 Sep, 2013 12:30:51 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.26
11 Sep, 2013 12:30:51 AM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor /etc/tomcat7/Catalina/localhost/host-manager.xml
11 Sep, 2013 12:30:58 AM org.apache.catalina.util.SessionIdGenerator createSecureRandom
INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [6,114] milliseconds.
11 Sep, 2013 12:30:58 AM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor /etc/tomcat7/Catalina/localhost/manager.xml
11 Sep, 2013 12:30:58 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /var/lib/tomcat7/webapps/sms.war
11 Sep, 2013 12:30:58 AM org.apache.catalina.core.ContainerBase addChildInternal
SEVERE: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/sms]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    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:679)
Caused by: java.lang.UnsupportedClassVersionError: org/raxa/module/handlesms/IncomingSMS : Unsupported major.minor version 51.0 (unable to load class org.raxa.module.handlesms.IncomingSMS)
    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.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:108)
    at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:58)
    at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:381)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:858)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 11 more
11 Sep, 2013 12:30:58 AM org.apache.catalina.startup.HostConfig deployWAR
SEVERE: Error deploying web application archive /var/lib/tomcat7/webapps/sms.war
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/sms]]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898)
    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:679)
11 Sep, 2013 12:30:58 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /var/lib/tomcat7/webapps/sample.war
11 Sep, 2013 12:30:58 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /var/lib/tomcat7/webapps/ROOT
11 Sep, 2013 12:30:59 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
11 Sep, 2013 12:30:59 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 7455 ms

我尝试使用apache ant创建war文件，但它也给出了同样的错误。

在eclipse中我提供了tomcat安装目录为/ usr / share / tomcat7，即$ catalina_home

java的版

java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

解将tomcat java_home设置为系统java-version

教程：Link to set java_home of tomcat7

Answer 1

实际上，Exception的主要内容是java.lang.UnsupportedClassVersionError不支持的major.minor版本51.0
这意味着至少必须使用java 7来启动tomcat。

你应该检查你启动tomcat的jdk 肯定它比java 7低。没有必要匹配java -version返回

深入了解java.lang.UnsupportedClassVersionError：
http://javarevisited.blogspot.ch/2011/07/javalangunsupportedclassversionerror.html

Tomcat7战争文件问题

1 个答案: