Referenced file contains errors (http://struts.apache.org/dtds/struts-2.1.7.dtd).

XML找不到dtd文件
 
 
在浏览器中输入http://struts.apache.org/dtds/struts-2.1.7.dtd，会得到struts-2.1.7.dtd文件，将它保存在/WEB-INF/classes文件夹下
 
 
windows-->preferences-->XML-->XML Catalog-->add
 
 
Location: test/WebContent/WEB-INF/classes/struts-2.1.7.dtd
 
keytype: Public ID
 
key:    -//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN