dubbo部署到tomcat启动后显示管理界面后点击任何按钮都报错，错误如下

炒冰 2016-04-28 04:14:40

java.lang.NoClassDefFoundError: Could not initialize class com.alibaba.citrus.util.internal.Servlet3Util
com.alibaba.citrus.service.requestcontext.impl.RequestContextChainingServiceImpl.getRequestContext(RequestContextChainingServiceImpl.java:246)
com.alibaba.citrus.webx.support.AbstractWebxRootController.getRequestContext(AbstractWebxRootController.java:352)
com.alibaba.citrus.webx.support.AbstractWebxRootController.service(AbstractWebxRootController.java:148)
com.alibaba.citrus.webx.servlet.WebxFrameworkFilter.doFilter(WebxFrameworkFilter.java:152)
com.alibaba.citrus.webx.servlet.FilterBean.doFilter(FilterBean.java:148)
com.alibaba.citrus.webx.servlet.SetLoggingContextFilter.doFilter(SetLoggingContextFilter.java:61)
com.alibaba.citrus.webx.servlet.FilterBean.doFilter(FilterBean.java:148)

jdk是1.8 改了一些dubbo后台的依赖引入：

1、webx的依赖改为3.1.6版；

<dependency>
<groupId>com.alibaba.citrus</groupId>
<artifactId>citrus-webx-all</artifactId>
<version>3.1.6</version>
</dependency>
2、添加velocity的依赖，我用了1.7；

<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
3、对依赖项dubbo添加exclusion，避免引入旧spring

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>${project.parent.version}</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
</exclusion>
</exclusions>
</dependency>
4、webx已有spring 3以上的依赖，因此注释掉dubbo-admin里面的spring依赖






启动到dubbo后台首页正常，点击任何按钮就报错了

确认没有引进spring 3以下版本，没有citrus-webx-all冲突包，citrus-webx-all的jar包有在lib目录下
请大神帮忙解决下

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