摘要:        
springfox-swagger-ui 3.0.0 解决 No operations defined in spec! No API definition provided.
Unable to render this definition
The provided definition does not specify a valid version field.
Please indicate a valid Swagger or OpenAPI version field. Supported version fields are swagger: "2.0" and those that match openapi: 3.0.n (for example, openapi: 3.0.0).    
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