解决dubbox-demo-provider.xml报错的问题：提示Failed to read schema document

dubbo-demo-provider导入eclipse后dubBox-demo-provider.xml报错详情：：

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>.

解决方案：：

1.解压dubbo-2.8.4.jar,在解压后的文件中找到dubbo.xsd文件，并copy至一个目录，如E:/dubbo

2.Eclipse:::: (1)windows->preferrence->xml->xmlcatalog

(2)add->catalogentry->filesystem

3. 右击dubbo-demo-provider.xml--->validate.

4.错误搞定