Question

在tomcat启动的时候报错。tomcat没有发布项目也会报错。。 请问这是什麼错误

SEVERE: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CRSeMag]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1948)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NoClassDefFoundError: java/nio/charset/StandardCharsets
at org.apache.tomcat.websocket.WsWebSocketContainer.<clinit>(WsWebSocketContainer.java:109)
at org.apache.tomcat.websocket.server.WsSci.init(WsSci.java:154)
at org.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:68)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5506)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Caused by: java.lang.ClassNotFoundException: java.nio.charset.StandardCharsets
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 16 more
2015-9-24 12:24:45 org.apache.catalina.startup.HostConfig deployDirectory
SEVERE: Error deploying web application directory E:\myzhou\myComputer\apache-tomcat-7.0.64\apache-tomcat-7.0.64\webapps\CRSeMag
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component

Answer 1

Caused by: java.lang.ClassNotFoundException: java.nio.charset.StandardCharsets

根据这行的提示，我怀疑是你的jdk版本不对导致的，因为这个类是在jdk1.7里面才开始有的。建议你升级jdk，或者把tomcat设置成bio的模式。

追问

是jdk的问题， 不过你是怎麼看出来的？

Answer 2

少 了JAR包 导致少了一些类不能加载

追问

可是我没有添加项目到tomcat也会报错啊？

追答

你的tomcat 是安装版的还是解压缩版的？

追问

是压缩的