Spring boot Spring boot OpenAPI 3下载包含JSON内容和附件的多部分

当我尝试下载带有Swagger 3.0模式定义的文件时，我看到一个406错误。多部分文件下载的模式定义如下所示

"get": {
    "operationId": "getAttachment",
    "summary": "Retrieve attachments to a existing Ticket",
    "tags": [
      "changeRequest"
    ],
    "parameters": [
      {
        "required": true,
        "name": "id",
        "in": "path",
        "description": "Identifier of the Change Request",
        "schema": {
          "type": "string"
        }
      }
    ],
    "responses": {
      "200": {
        "description": "Ok",
        "headers": {
        },
        "content": {
          "multipart/form-data": {
            "schema": {
                "type": "object",
                "properties": {
                    "metadata": {
                        "$ref": "#/components/schemas/Attachment"
                    },
                    "file": {
                        "type": "string", 
                        "format":"binary",
                        "description": "Actual File Attachment"
                    }
                }
            }
          }
        }
      }
    }
}

当使用看似合适的swagger插件构建时，它会生成以下类：

public class InlineResponse200   {
  @JsonProperty("metadata")
  private Attachment metadata = null;

  @JsonProperty("file")
  private Resource file;

以下是生成的实现：

    @ApiOperation(value = "Retrieve attachments to a existing Ticket", nickname = "getAttachment", notes 
    = "", response = InlineResponse200.class, tags={ "changeRequest", })
    @RequestMapping(value = "/changeRequest/attachment/{id}",
        produces = { "multipart/form-data", "application/json" }, 
        method = RequestMethod.GET)
    public ResponseEntity<InlineResponse200> getAttachment(@PathVariable("id") String id) {
        Attachment lAttachmentMetadata = new Attachment();
        lAttachmentMetadata.setDescription("This is a sample description");
        lAttachmentMetadata.setSize(2000);
        
        FileSystemResource fileSysResource = new FileSystemResource(new File("C:\\Projects\\Service Assurance\\Chnage Mgmt\\Attachments\\attachment.txt"));
        InlineResponse200 responseObject = new InlineResponse200();
        responseObject.setFile(fileSysResource);
        responseObject.setMetadata(lAttachmentMetadata);
        
        return ResponseEntity.ok().header(HttpHeaders.CONTENT_DISPOSITION,
                "attachment; filename=\"" + fileSysResource.getFilename() + "\"").header("Content-Type", "multipart/form-data").body(responseObject);

    }

@ApiOperation（value=“检索现有票据的附件”，昵称=“getAttachment”，注释
=“”，response=InlineResponse200.class，标记={“changeRequest”，}）
@RequestMapping（value=“/changeRequest/attachment/{id}”，
产生={“多部分/表单数据”，“应用程序/json”}，
method=RequestMethod.GET）
公共响应属性getAttachment（@PathVariable（“id”）字符串id）{
附件lAttachmentMetadata=新附件（）；
setDescription（“这是一个示例描述”）；
lAttachmentMetadata.setSize（2000年）；
FileSystemResource fileSysResource=新的FileSystemResource（新文件（“C:\\Projects\\Service Assurance\\Chnage Mgmt\\Attachments\\attachment.txt”）；
InlineResponse200 responseObject=新的InlineResponse200（）；
setFile（fileSysResource）；
responseObject.setMetadata（lAttachmentMetadata）；
返回ResponseEntity.ok（）.header（HttpHeaders.CONTENT\u），
“附件；文件名=\”“+fileSysResource.getFilename（）+”\）.header（“内容类型”，“多部分/表单数据”）.body（响应对象）；
}

当我调用该服务时，我看到返回了一个406错误

Thu Oct 15 03:46:39 IST 2020:DEBUG:<< "{"timestamp":"2020-10-14T22:16:39.258Z","status":406,"error":"Not Acceptable","message":"Could not find acceptable representation","path":"/changeManagement/api/v1/changeRequest/attachment/1234"}"

周四10月15日03:46:39 IST 2020:调试：