解决:dubbo找不到dubbo.xsd报错

构建dubbo工程经常会遇到的问题

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>.

如图：

解决方案：

1.下载dubbo.xsd

2.preferences

3.添加xsd的地址以及key

Keys如下：

http://code.alibabatech.com/schema/dubbo/dubbo.xsd