專案引入Dubbo之後，XML檔案報錯： 

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:service'.
	- 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>.

如下圖所示：

其實在專案中也不影響使用，只是強迫症的話，看著感覺是專案報錯，就想著修改一下這裡的配置：

1： 解壓縮 Dubbo-*.jar 檔案，在檔案中找到 dubbo.xsd 檔案；

2：windows->preferrence->xml->xmlcatalog 
add->catalog entry  ->file system 選擇剛剛下載的檔案路徑