OpenApi 使用 JSON 发送 MultipartFile 请求，不支持获取“应用程序/八位字节流”错误

Question

我正在使用 Spring Boot，我想使用 Swagger UI 发送带有 json 的 MultipartFile，但我收到错误

'application/octet-stream' error not supported

，如果我使用 Postman 工作得很好。

@ResponseBody
@RequestMapping(value = "/upload", method = RequestMethod.POST,
produces = { "application/json" },
consumes = { "multipart/form-data" })
public String hello(
   @RequestPart(value = "file") MultipartFile file,
   @RequestPart("grupo") Grupo grupo) {
      if (file != null) {
        logger.info("File name:  " + file.getOriginalFilename());
      }
      logger.info(grupo.toString());
   return grupo.toString();
 }

我该如何解决这个问题？

• springdoc-openapi-ui 1.4.4
• Spring Boot 2.3.2.RELEASE
• spring-boot-starter-web
• Maven
• spring-boot-starter-data-jpa

Answer 1

按照@Vishal Zanzrukia 提供的链接

我添加了这个配置：

import java.util.ArrayList;

import org.springframework.boot.info.BuildProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;



@Configuration
public class OpenApiConfig {

    /**
     * 
     * This method is needed to allow sending multipart requests. For example, when an item is 
     * created together with an image. If this is not set the request will return an exception with:
     * 
     * Resolved [org.springframework.web.HttpMediaTypeNotSupportedException: Content-Type 
     * 'application/octet-stream' is not supported]
     * 
     * @param converter
     */
    public OpenApiConfig(MappingJackson2HttpMessageConverter converter) {
        var supportedMediaTypes = new ArrayList<>(converter.getSupportedMediaTypes());
        supportedMediaTypes.add(new MediaType("application", "octet-stream"));
        converter.setSupportedMediaTypes(supportedMediaTypes);
    }
...

现在它似乎可以按预期工作，代码如下：

Controller.java

    @PostMapping(path = "/", consumes = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Item> createItemWithoutImage(@Valid @RequestBody Item item) {
        Item createdItem = itemService.createItem(item);
        return ResponseEntity.status(HttpStatus.CREATED).body(createdItem);
    }

    @PostMapping(path = "/", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public ResponseEntity<Item> createItem(@Valid @RequestPart Item item,
            @RequestPart(name = "image", required = false) MultipartFile imageFile) {

        // DO Something with the image

        Item createdItem = itemService.createItem(item);
        return ResponseEntity.status(HttpStatus.CREATED).body(createdItem);
    }

这就是它大摇大摆的样子：

Answer 2

要使用 multipartFile 发送 json，请使用注释

@Parameter

，类型为

"string"

，格式为

"binary"

，这样您就可以发送格式为 json 的文件。

@Parameter(schema =@Schema(type = "string", format = "binary"))

然后就变成这样了。

@PostMapping(value = "/test", consumes = MediaType.MULTIPART_FORM_DATA_VALUE )
public ResponseEntity<Void> saveDocu2ment(
        @RequestPart(value = "personDTO") @Parameter(schema =@Schema(type = "string", format = "binary")) final PersonDTO personDTO,
        @RequestPart(value = "file")  final MultipartFile file) {
    return null;
}

参考 - 使用 JSON 的多部分请求 - GitHub Springdoc openApi