发现每个Web项目都会出相同的错误

控制台报错如下
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/HelloWorld2]]
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:1119)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
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[/HelloWorld2]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
... 6 more
Caused by: java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter name sturts2
at org.apache.catalina.core.StandardContext.validateFilterMap(StandardContext.java:3205)
at org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:3170)
at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1343)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1355)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:887)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:387)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5503)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
... 6 more

index的报错是Multiple annotations found at this line:
- The superclass "javax.servlet.http.HttpServlet" was not found on the Java
Build Path
但按照网上的Build Path教程没有效果

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Filter mapping specifies an unknown filter name sturts2你看一下是不是Struts2配置中哪里写错了

web.xml 贴出来看看