Java spring引导REST POST API发送文件

我是SpringREST新手，正在尝试创建一个RESTPOST API，用户可以在其中向服务器发送文件

@RequestMapping(value = "/order", method = RequestMethod.POST)
public String create(@RequestParam("file") MultipartFile file) {        
        System.out.println("---------INSIDE ORDER----------");
        return "file succesfully received!";
}

但是，当我通过上传order.txt文件并选择表单数据（在postman中）调用此API时，我得到了这个错误

{
  "timestamp": 1474129488458,
  "status": 400,
  "error": "Bad Request",
  "exception": "org.springframework.web.multipart.support.MissingServletRequestPartException",
  "message": "Required request part 'file' is not present",
  "path": "/order"
}

---

问题不在于接受请求的代码。这取决于你如何提出请求

-d用于传递数据。您必须使用-F，如下所示

curl -X POST localhost:8080/order -F "file=@cooltext.txt"

---

有关更多详细信息，请参阅的文章部分

验证您是否有以下物品：

@Bean
public CommonsMultipartResolver multipartResolver() {
    CommonsMultipartResolver multipart = new CommonsMultipartResolver();
    multipart.setMaxUploadSize(3 * 1024 * 1024);
    return multipart;
}

@Bean
@Order(0)
public MultipartFilter multipartFilter() {
    MultipartFilter multipartFilter = new MultipartFilter();
    multipartFilter.setMultipartResolverBeanName("multipartResolver");
    return multipartFilter;
}

在applications.properties中

# MULTIPART (MultipartProperties)
spring.http.multipart.enabled=true 
# Enable support of multi-part uploads.
# spring.http.multipart.file-size-threshold=3 # Threshold after which files will be written to disk. Values can use the suffixed "MB" or "KB" to indicate a Megabyte or Kilobyte size.
spring.http.multipart.location= /
# Intermediate location of uploaded files.
spring.http.multipart.max-file-size=10MB
# Max file size. Values can use the suffixed "MB" or "KB" to indicate a Megabyte or Kilobyte size.
spring.http.multipart.max-request-size=10MB
# Max request size. Values can use the suffixed "MB" or "KB" to indicate a Megabyte or Kilobyte size.
spring.http.multipart.resolve-lazily=false 
# Whether to resolve the multipart request lazily at the time of file or parameter access.`enter code here`

---

如何传递

文件

参数？请发布请求。curl-X Post \-d json='{“name”：“john”，“lastNane”：“doe”}'如果我想附加一个文本文件（包含json），我应该使用requestBody吗？如果您使用了RestController，则无需使用requestBody