java - 当作为服务器运行时，Eclipse - Tomcat - java.lang.NoClassDefFoundError : javax/servlet/ServletConfig

Question

我整天都在为此奋斗:我有 DynamicWebProject。它运作良好。但在某些时候，我决定清理项目中未使用的额外 jar 。清理后，我遇到了很多错误。所以我回滚了所有更改(我的意思是我重新调整了所有 jar )。但我也玩过项目、Eclipse 和调试配置的构建路径。不幸的是我不记得这个变化(用 Path 的东西)。当我在服务器上运行时，tomcat 向我显示:

`

04.12.2012 16:37:43 org.apache.catalina.core.ApplicationContext log
SEVERE: StandardWrapper.Throwable
java.lang.NoClassDefFoundError: javax/servlet/ServletConfig
    at org.apache.axis2.deployment.WarBasedAxisConfigurator.<init>(WarBasedAxisConfigurator.java:103)
    at org.apache.axis2.transport.http.AxisServlet.initConfigContext(AxisServlet.java:584)
    at org.apache.axis2.transport.http.AxisServlet.init(AxisServlet.java:454)
    at org.apache.axis2.webapp.AxisAdminServlet.init(AxisAdminServlet.java:60)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5027)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
    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$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
04.12.2012 16:37:43 org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /library threw load() exception
java.lang.NoClassDefFoundError: javax/servlet/ServletConfig
    at org.apache.axis2.deployment.WarBasedAxisConfigurator.<init>(WarBasedAxisConfigurator.java:103)
    at org.apache.axis2.transport.http.AxisServlet.initConfigContext(AxisServlet.java:584)
    at org.apache.axis2.transport.http.AxisServlet.init(AxisServlet.java:454)
    at org.apache.axis2.webapp.AxisAdminServlet.init(AxisAdminServlet.java:60)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5027)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
04.12.2012 16:37:43 org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
04.12.2012 16:37:43 org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
04.12.2012 16:37:43 org.apache.catalina.startup.Catalina start
INFO: Server startup in 3556 ms

`

我真的被这场无休止的战斗束缚住了。我做错了什么？ Eclipse 和 Tomcat 试图告诉我什么？

---

完成。

所以。我如何恢复功能。首先，我的项目备份在 SVN 存储库中。接下来我在 Eclipse 中创建新的工作区。不同文件夹中的新工作区。以及来自 SVN 的 Checkout 项目。在那之后，在步骤 - 在服务器上运行，我发现了错误，并一个一个地添加了错过的库( jar )。哇啦，它起作用了!所以我怎么想，问题在于eclipce和项目的配置，也在运行/调试配置中。如何查找配置中的错误，我不知道 :( 但我会在旧工作区尝试。

Answer 1

您的类路径中缺少 servlet-api.jar。检查一下

更新

1) Right click on project
2) Got to java build path
3) Click on add library in right hand side.
4) Choose server run time.
5) Click next and select your tom cat server.
6) Click on finish.

然后再试一次