Eclipse Tomcat 严重：加载 WebappClassLoader 时出错
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Eclipse Tomcat SEVERE: Error loading WebappClassLoader
提问by xxjjnn
Tomcat starts on Eclipse successfully, however any action involving the Servlet gives the error below.
Tomcat 在 Eclipse 上成功启动，但是任何涉及 Servlet 的操作都会出现以下错误。
I suspect the problem is that TomCat is looking in the WEB-INF folder for classes, though I have no idea where Eclipse has compiled and hidden them (not there for sure). How do I fix?
我怀疑问题在于 TomCat 正在 WEB-INF 文件夹中查找类，尽管我不知道 Eclipse 在哪里编译和隐藏了它们（不确定）。我该如何解决？
SEVERE: Error loading WebappClassLoader
context: /MyEclipseProject
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@3344c133
servlet.StartServlet
java.lang.ClassNotFoundException: servlet.StartServlet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
Have already read:
已经阅读：
Error loading WebappClassLoader in Tomcat
回答by duzhiweibe
The compiled class files are under $user.dir/webContent/WEB_INF/classes folder. If there are no classes there, I suggest you remove the project from the tomcat server, then clean your current project. Finally, run your porject(jsp etc) on the server again. I hope this will help.
编译后的类文件位于 $user.dir/webContent/WEB_INF/classes 文件夹下。如果那里没有类，我建议您从tomcat服务器中删除该项目，然后清理您当前的项目。最后，再次在服务器上运行您的项目（jsp 等）。我希望这将有所帮助。
回答by apurva.nandan
Please remove the tomcat server runtime library from your project build path and then add the tomcat server again. Run now, it should solve your problem I guess.
请从您的项目构建路径中删除 tomcat 服务器运行时库，然后再次添加 tomcat 服务器。现在运行，我想它应该可以解决您的问题。
回答by vijay M
I also got the same problem, after adding all the jars in "lib" folder now it's working properly
我也遇到了同样的问题，在“lib”文件夹中添加了所有 jar 之后，现在它可以正常工作了
回答by senior
- Clean your project
- Refresh it
- redeploy it
- 清理你的项目
- 刷新一下
- 重新部署它
I tried these steps and my app works :)
我尝试了这些步骤并且我的应用程序有效:)
