这是我纠结两天的问题，最终是约束文件没有添加正确，亲测可用，自己的错误内容如下，其他的错误信息也可以处理。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'.
- <dubbo:application name="e3-manager-web" />
- 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>.
