spring整合struts配置方式（简要）

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第1种：在struts-config.xml中配置，如下
以插件的形式集成spring
<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
<set-property property="contextConfigLocation" value="classpath:applicationContext.xml" />
</plug-in>

第2种：在web.xml中配置，如下
<context-param>
  <param-name>
   contextConfigLocation
  </param-name>
  <param-value>
   classpath:applicationContext.xml
  </param-value>
</context-param>
<listener>
  <listener-class>
   org.springframework.web.context.ContextLoaderListener
  </listener-class>
</listener>

第三种：在web.xml中配置2，如下
<context-param>
  <param-name>
   contextConfigLocation
  </param-name>
  <param-value>
   classpath:applicationContext.xml
  </param-value>
</context-param>

<servlet>
  <servlet-name>
   SpringContextServlet
  </servlet-name>
  <servlet-class>
   org.springframework.web.context.ContextLoaderServlet
  </servlet-class>
  <load-on-startup>1</load-on-startup>
</servlet>

class "org.apache.commons.collections.ArrayStack"'s signer information does not match signer information of other classes in the same package(错误)