在几种情况下，Tomcat因为maven而无法打开

时间：2017-07-10 12:07:11

标签： java eclipse maven tomcat

这两天，我遇到了maven的一些问题（我是新手），都导致无法打开tomcat。这里有几种情况：

1.从github下载导入maven项目后;

2.将动态项目更改为maven项目后;

3.在pom.xml中添加一些依赖项后;

4.更改链接到maven项目的数据库后;

可能还有其他情况会导致tomcat打开问题。是否有任何类似的情况或任何解决方案？真的很失望，突然你无法打开tomcat，也许只是做了一些事情。如果可能我希望那里是一些解释。谢谢。 所有日志都是：

A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/WechatDemo]]
    at java.util.concurrent.FutureTask.report(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/WechatDemo]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    ... 6 more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileUploadException
    at java.lang.Class.getDeclaredFields0(Native Method)
    at java.lang.Class.privateGetDeclaredFields(Unknown Source)
    at java.lang.Class.getDeclaredFields(Unknown Source)
    at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:110)
    at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:262)
    at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:136)
    at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66)
    at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:328)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:778)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:94)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5114)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileUploadException
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1285)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119)
    ... 19 more

七月 10, 2017 8:09:40 下午 org.apache.catalina.core.ContainerBase startInternal
严重: 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(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:655)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more

七月 10, 2017 8:09:40 下午 org.apache.catalina.startup.Catalina start
严重: 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:167)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:655)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
    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:167)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
    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:947)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 11 more

命令输出是（在我的cmd中使用项目根词典绑定mvn依赖：tree之后）：

[INFO] Scanning for projects...
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building WechatDemo 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ WechatDemo ---
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Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-invoker/2.0.1
1/maven-invoker-2.0.11.jar (29 KB at 3.8 KB/sec)
[INFO] com.yi.wechat:WechatDemo:war:0.0.1-SNAPSHOT
[INFO] +- org.mybatis:mybatis-spring:jar:1.3.1:compile
[INFO] +- junit:junit:jar:4.12:compile
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:compile
[INFO] +- javax.servlet:jstl:jar:1.2:compile
[INFO] +- javax.servlet:javax.servlet-api:jar:4.0.0-b07:compile
[INFO] +- javax.servlet:servlet-api:jar:3.0-alpha-1:compile
[INFO] +- mysql:mysql-connector-java:jar:6.0.6:compile
[INFO] +- org.springframework:spring-webmvc:jar:4.3.9.RELEASE:compile
[INFO] |  +- org.springframework:spring-aop:jar:4.3.9.RELEASE:compile
[INFO] |  +- org.springframework:spring-beans:jar:4.3.9.RELEASE:compile
[INFO] |  +- org.springframework:spring-context:jar:4.3.9.RELEASE:compile
[INFO] |  +- org.springframework:spring-core:jar:4.3.9.RELEASE:compile
[INFO] |  +- org.springframework:spring-expression:jar:4.3.9.RELEASE:compile
[INFO] |  \- org.springframework:spring-web:jar:4.3.9.RELEASE:compile
[INFO] +- org.springframework:spring-jdbc:jar:4.3.9.RELEASE:compile
[INFO] |  \- org.springframework:spring-tx:jar:4.3.9.RELEASE:compile
[INFO] +- com.mchange:c3p0:jar:0.9.5.2:compile
[INFO] |  \- com.mchange:mchange-commons-java:jar:0.2.11:compile
[INFO] +- org.mybatis:mybatis:jar:3.4.4:compile
[INFO] +- org.apache.shiro:shiro-all:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-lang:jar:1.4.0:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.21:compile
[INFO] |  +- org.apache.shiro:shiro-config-core:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-config-ogdl:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-crypto-core:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-crypto-hash:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-crypto-cipher:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-event:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-core:jar:1.4.0:compile
[INFO] |  |  \- org.apache.shiro:shiro-cache:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-web:jar:1.4.0:compile
[INFO] |  +- org.apache.shiro:shiro-aspectj:jar:1.4.0:compile
[INFO] |  |  +- org.aspectj:aspectjrt:jar:1.8.9:compile
[INFO] |  |  \- org.aspectj:aspectjweaver:jar:1.8.9:compile
[INFO] |  +- org.apache.shiro:shiro-ehcache:jar:1.4.0:compile
[INFO] |  |  \- net.sf.ehcache:ehcache-core:jar:2.6.11:compile
[INFO] |  +- org.apache.shiro:shiro-guice:jar:1.4.0:compile
[INFO] |  |  +- com.google.inject:guice:jar:3.0:compile
[INFO] |  |  |  +- javax.inject:javax.inject:jar:1:compile
[INFO] |  |  |  \- aopalliance:aopalliance:jar:1.0:compile
[INFO] |  |  \- com.google.inject.extensions:guice-multibindings:jar:3.0:compile
[INFO] |  +- org.apache.shiro:shiro-hazelcast:jar:1.4.0:compile
[INFO] |  |  \- com.hazelcast:hazelcast:jar:3.7.2:compile
[INFO] |  +- org.apache.shiro:shiro-quartz:jar:1.4.0:compile
[INFO] |  |  \- org.opensymphony.quartz:quartz:jar:1.6.1:compile
[INFO] |  \- org.apache.shiro:shiro-spring:jar:1.4.0:compile
[INFO] +- net.sf.json-lib:json-lib:jar:2.4:compile
[INFO] |  +- commons-beanutils:commons-beanutils:jar:1.8.0:compile
[INFO] |  +- commons-collections:commons-collections:jar:3.2.1:compile
[INFO] |  +- commons-lang:commons-lang:jar:2.5:compile
[INFO] |  +- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] |  \- net.sf.ezmorph:ezmorph:jar:1.0.6:compile
[INFO] \- commons-fileupload:commons-fileupload:jar:1.3.3:compile
[INFO]    \- commons-io:commons-io:jar:2.2:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 02:17 min
[INFO] Finished at: 2017-07-10T22:00:57+08:00
[INFO] Final Memory: 12M/29M
[INFO] ------------------------------------------------------------------------

1 个答案:

答案 0 :(得分：0)

显然没有找到以下某些类： - 

    org/apache/commons/fileupload/FileUploadException

您必须将此库包含在项目依赖库文件夹中。

  1. 从官方网站获取“commons-fileupload.jar” - http://commons.apache.org/fileupload/

  2. 从Maven存储库获取“commons-fileupload.jar”

    <dependency>
   <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
   <version>1.2.1</version>
 </dependency>

    3. 您需要将commons-fileupload.jar和commons-io.jar放到WEB-INF / lib forlder中。在构建期间使用Classpath，但它们也必须在运行时可用。

    实际上，如果您已经使用IDE进行Java EE开发（比如Eclipse），那么将这些Jars放到WEB-INF / lib就足够了，因为它们会在构建的claspath中自动显示。

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