java.lang.Error: Unresolved compilation problems

[lxlyynnch]

严重: Exception starting filter UserLogin
java.lang.Error: Unresolved compilation problems:
The import javax.servlet.FilterChain cannot be resolved
The import javax.servlet.FilterConfig cannot be resolved
The import javax.servlet.ServletException cannot be resolved
The import javax.servlet.ServletRequest cannot be resolved
The import javax.servlet.ServletResponse cannot be resolved
The import javax.servlet.http.HttpServletRequest cannot be resolved
The import javax.servlet.http.HttpServletResponse cannot be resolved
The hierarchy of the type CanUserLogin is inconsistent
ServletRequest cannot be resolved to a type
ServletResponse cannot be resolved to a type
FilterChain cannot be resolved to a type
ServletException cannot be resolved to a type
HttpServletRequest cannot be resolved to a type
HttpServletRequest cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
FilterConfig cannot be resolved to a type
ServletException cannot be resolved to a type

at com.back.filter.CanUserLogin.<init>(CanUserLogin.java:5)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2015-9-23 11:28:37 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter NyWebFiler
java.lang.Error: Unresolved compilation problems:
The import javax.servlet.FilterChain cannot be resolved
The import javax.servlet.FilterConfig cannot be resolved
The import javax.servlet.ServletException cannot be resolved
The import javax.servlet.ServletRequest cannot be resolved
The import javax.servlet.ServletResponse cannot be resolved
The import javax.servlet.http.HttpServletRequest cannot be resolved
The import javax.servlet.http.HttpServletResponse cannot be resolved
The import javax.servlet.http.HttpSession cannot be resolved
The import com.customer.CorpDomain cannot be resolved
The hierarchy of the type NyWebFiler is inconsistent
The type javax.servlet.Filter cannot be resolved. It is indirectly referenced from required .class files
HttpServletRequest cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
HttpSession cannot be resolved to a type
HttpServletRequest cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
HttpServletRequest cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
FilterChain cannot be resolved to a type
ServletException cannot be resolved to a type
CorpDomain cannot be resolved
HttpSession cannot be resolved to a type
CorpDomain cannot be resolved
ServletRequest cannot be resolved to a type
ServletResponse cannot be resolved to a type
FilterChain cannot be resolved to a type
ServletException cannot be resolved to a type
HttpServletRequest cannot be resolved to a type
HttpServletRequest cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
HttpServletResponse cannot be resolved to a type
CorpDomain cannot be resolved
CorpDomain cannot be resolved
HttpSession cannot be resolved to a type
CorpDomain cannot be resolved
CorpDomain cannot be resolved
HttpServletRequest cannot be resolved to a type
CorpDomain cannot be resolved
CorpDomain cannot be resolved
CorpDomain cannot be resolved
HttpServletRequest cannot be resolved to a type
FilterConfig cannot be resolved to a type
ServletException cannot be resolved to a type

at com.back.filter.NyWebFiler.<init>(NyWebFiler.java:7)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2015-9-23 11:28:37 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2015-9-23 11:28:37 org.apache.catalina.core.StandardContext start
严重: Context [/cqzxsyxx] startup failed due to previous errors
2015-9-23 11:28:37 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.

求解决方法，对myeclipse配置不是很了解 求详解 不甚感激