1.将servlet-api.jar替换项目中的servlet-api2.4
2.<servlet>
<servlet-name>dwr-invoker</servlet-name>
<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
<!-- 防止DWR CSRF Security Error 添加参数crossDomainSessionSecurity和allowScriptTagRemoting-->
<init-param>
<param-name>crossDomainSessionSecurity</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>allowScriptTagRemoting</param-name>
<param-value>true</param-value>
</init-param>
<!-- Comet方式 -->
<init-param>
<param-name>activeReverseAjaxEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<!-- 通知DWR 在应用程序启动时初始化 ReverseAjaxTracker 见配置dwr.xml -->
<param-name>initApplicationScopeCreatorsAtStartup</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<!-- 激活json/jsonp服务 -->
<init-param>
<param-name>jsonpEnabled</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
TOMCATE8下面项目启动问题
原文：http://www.cnblogs.com/toyz/p/6357788.html
