用spring+struts2+hibernate开发的项目放到服务器上时由于服务器不能联网，启动tomcat报错。错误如下：
org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from ServletContext resource [/WEB-INF/classes/struts.xml]; nested exception is java.net.UnknownHostException: struts.apache.org
我的解决办法是：
1.将struts-2.0.dtd下载下来放入到工程的classPath下。也就是它要出现在下面的路径中TOMCAT_HOME/webapps/项目名称/。
2.将红字部分
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "
http://struts.apache.org/dtds/struts-2.0.dtd" >
改为绿字部分：
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "
struts-2.0.dtd" >
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