dubbo配置文件xml校验报错

配置dubbo服务xml后，程序能正常执行，但validate会出现一些异常：

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>

解决办法：

1. 下载dubbo的jar包，比如：dubbo-2.5.3.jar，解压能获取到dubbo.xsd
2. 在eclipse中导入文件dubbo.xsd: windows->preferrence->xml->xmlcatalog, add->catalog entry ->file system 选择文件dubbo.xsd 添加后，Key默认是这样的：

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3. 修改key值为：http://code.alibabatech.com/schema/dubbo/dubbo.xsd，因为xml配置文件中xsi:schemaLocation的也是这个值，保持一致，重新validate，异常消失

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