java.lang.Error: Unresolved compilation problems:

tracy337 2010-04-28 09:57:12
信息: XML validation disabled
([localhost].[/o3] 3714) Error configuring application listener of class com.o3eie.util.SessionEventListener
java.lang.Error: Unresolved compilation problems:
The import javax.servlet.ServletContext cannot be resolved
The import javax.servlet.http.HttpSession cannot be resolved
The import javax.servlet.http.HttpSessionEvent cannot be resolved
The import javax.servlet.http.HttpSessionListener cannot be resolved
HttpSessionListener cannot be resolved to a type
ServletContext cannot be resolved to a type
HttpSessionEvent cannot be resolved to a type
HttpSession cannot be resolved to a type
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
HttpSessionEvent cannot be resolved to a type
HttpSession cannot be resolved to a type

at com.o3eie.util.SessionEventListener.<init>(SessionEventListener.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.StandardContext.listenerStart(StandardContext.java:3712)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
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:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
([localhost].[/o3] 3714) Error configuring application listener of class com.o3eie.util.ApplicationEventListener
java.lang.Error: Unresolved compilation problems:
The import javax.servlet.ServletContextEvent cannot be resolved
The import javax.servlet.ServletContextListener cannot be resolved
ServletContextListener cannot be resolved to a type
ServletContextEvent cannot be resolved to a type
ServletContextEvent cannot be resolved to a type

at com.o3eie.util.ApplicationEventListener.<init>(ApplicationEventListener.java:11)
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.StandardContext.listenerStart(StandardContext.java:3712)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
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:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
([localhost].[/o3] 3714) Error configuring application listener of class com.safenet.sentinel.OnlineCounterListener
java.lang.Error: Unresolved compilation problems:
The type javax.servlet.http.HttpSession cannot be resolved. It is indirectly referenced from required .class files
The import javax.servlet.http.HttpSession cannot be resolved
The import javax.servlet.http.HttpSessionEvent cannot be resolved
The import javax.servlet.http.HttpSessionListener cannot be resolved
HttpSessionListener cannot be resolved to a type
HttpSessionEvent cannot be resolved to a type
HttpSessionEvent cannot be resolved to a type
HttpSession cannot be resolved to a type

at com.safenet.sentinel.OnlineCounterListener.<init>(OnlineCounterListener.java:1)
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.StandardContext.listenerStart(StandardContext.java:3712)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
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:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)


求各位大虾给点宝贵意见。。是不是就是缺包的问题。好像我导入你进入还是报错。。src 下面还是红叉出现。。但是在公司里面同样的IDE,同意的项目却可以正常编译.. 。。忘各位虾仁多多发表意见。。小弟不甚感激！！！
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hmxingkong 2012-07-09
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没想到半年不做JavaEE，对这东西全陌生了，漏了个servlet-api.jar，谢啦
lsa19880728 2011-05-23
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我讲下我的方法 不一定对 你参考一下 就是 在window——prefernces——java——compiler jdk下面的版本选为1.4 刷新项目 试试 我的就是这样搞定的
sentianzhu 2011-05-22
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我也遇到这个问题啊，不知怎么办好，求办法
tracy337 2010-04-30
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针对楼上这位大哥。。我看了。。Tomcat库下面没有包。。你说的重新编辑 是怎么做呢。。

Yanbin_Q 2010-04-29
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The import javax.servlet.ServletContext cannot be resolved
The import javax.servlet.http.HttpSession cannot be resolved
The import javax.servlet.http.HttpSessionEvent cannot be resolved
The import javax.servlet.http.HttpSessionListener cannot be resolved

没有引入 servlet 包，从 Tomcat 或其他 Servlet 容器上拷一个来。
dameimm 2010-04-29
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在工程右击属性。看看buildpath有没有问题。有问题，重新编辑下。
再有就是编译级别的设置。到网上慢慢查吧。
tracy337 2010-04-29
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恩恩。。 引入了。还是不行。。我发现我的ide。。eclipse 的项目中没有导入Tomcat 相关的Jar包。。
Tomcat 类库下没有包。。这样子该怎么做呢??
crazylaa 2010-04-28
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可能是缺包或包版本不对。
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