配置dubbo时xml文件找不到dubbo.xsd

错误信息：
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 .
解救方法：
1.下载xsd文件
https://github.com/alibaba/dubbo/blob/master/dubbo-config/dubbo-config-spring/src/main/resources/META-INF/dubbo.xsd
2.把xsd配置到XML Cadalog
Windows->references->XML Cadalog->User Specidied Entries->add

注意一点是图中Key后面的dubbo.xsd要自己手动加上。