使用dubbo时xml文件里的dubbo标签报错，无法识别，报错信息为：
Multiple annotations found at this line:
- cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'dubbo:application'.
- schema_reference.4: Failed to read schema document 'http://code.alibabatech.com/schema/dubbo/dubbo.xsd', because 1) could not find the document; 2) the document could not be read; 3)
the root element of the document is not <xsd:schema>.
网上的解决办法很多，其实是对，就是去官网下载dubbo.jar解压里面的dubbo.xsd然后在eclipse--》windows--》preferences--》xml category--》add--》file system选择dubbo.xsd，此时默认填充的key为：
