急！向高手求解，运行tomcat时老是说：服务器遇到一个内部错误(),使它无法履行此项请求

[ye7758258]

小妹在这里先谢谢各位大侠！我有一个servlet的程序，运行时老是出现问题说：服务器遇到一个内部错误(),使它无法履行此项请求。具体的问题显示如下。我查了半天都没搞清楚到底是什么错误。请高手帮我看看是什么问题，改怎么解决？可以在这里留言，也可以加我的Q，我的QQ事593583974
严重: Error loading WebappClassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@cb6009
servlet.ResUser
java.lang.ClassNotFoundException: servlet.ResUser
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1083)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:806)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:619)
2011-5-14 17:57:55 org.apache.catalina.core.StandardWrapperValve invoke
严重: Allocate exception for servlet ResUser
java.lang.ClassNotFoundException: servlet.ResUser
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1083)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:806)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:619)

[ye7758258]

会是路径问题吗？具体路径问题该怎么设置？我WEB.XML里的设置如下所示，这样设置有什么问题吗？还是说jdk那边的路径之类的要设置？
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>ResUser</servlet-name>
<servlet-class>servlet.ResUser</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ResUser</servlet-name>
<url-pattern>/ResUser</url-pattern>
</servlet-mapping>

[悠忧虫]

java.lang.ClassNotFoundException: servlet.ResUser

找不到servlet包下的ResUser类

[ye7758258]

我知道，但是我不知道为什么会这样，该怎么解决呢？

[悠忧虫]

<servlet-class>servlet.ResUser</servlet-class>

改成你的servlet