我在jboss里做页面过滤器时出现错误

我在jboss里做页面过滤器出现错误.请高手帮忙.
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web.xml里配置
<filter>
<filter-name>websfilter</filter-name>
<filter-class>filter.dxsq.WebsFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>websfilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>websfilter</filter-name>
<url-pattern>*.html</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>websfilter</filter-name>
<url-pattern>*.htm</url-pattern>
</filter-mapping>

----------------------------------
jboss启动时出现下面错误:
14:09:05,022 ERROR [Digester] Parse Error at line 28 column -1: 组件“web-app”
在此不允许“filter”。
org.xml.sax.SAXParseException: 组件“web-app”在此不允许“filter”。
at org.apache.crimson.parser.Parser2.error(Parser2.java:3160)
at org.apache.crimson.parser.ValidatingParser$ChildrenValidator.consume(
ValidatingParser.java:349)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1317)
at org.apache.crimson.parser.Parser2.content(Parser2.java:1779)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1507)
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:500)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:442)

at org.apache.commons.digester.Digester.parse(Digester.java:1543)
at org.apache.catalina.startup.ContextConfig.applicationConfig(ContextCo
nfig.java:282)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:63
9)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfi
g.java:243)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:166)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3
567)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:821)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:80
7)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:579)

at org.jboss.web.catalina.EmbeddedCatalinaService41.createWebContext(Emb
eddedCatalinaService41.java:432)
at org.jboss.web.catalina.EmbeddedCatalinaService41.performDeploy(Embedd
edCatalinaService41.java:306)
at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:30
1)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:814)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:627)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:591)
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.util.jmx.MBeanProxy.invoke(MBeanProxy.java:174)
at $Proxy3.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymen
tScanner.java:435)
at org.jboss.deployment.scanner.URLDeploymentScanner.scanDirectory(URLDe
ploymentScanner.java:656)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentS
canner.java:507)
at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(A
bstractDeploymentScanner.java:266)
at org.jboss.system.ServiceMBeanSupport.start(ServiceMBeanSupport.java:1
65)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceControl
ler.java:1003)
at $Proxy0.start(Unknown Source)
at org.jboss.system.ServiceController.start(ServiceController.java:413)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.util.jmx.MBeanProxy.invoke(MBeanProxy.java:174)
at $Proxy2.start(Unknown Source)
at org.jboss.deployment.SARDeployer.start(SARDeployer.java:232)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:814)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:627)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:591)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:575)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBea
nDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:324)
at org.jboss.system.server.ServerImpl.start(ServerImpl.java:221)
at org.jboss.Main.boot(Main.java:148)
at org.jboss.Main$1.run(Main.java:381)
at java.lang.Thread.run(Thread.java:536)