Spring Controller @RequestBody 可以上传文件吗？
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Spring Controller @RequestBody with file upload is it possible?
提问by Yatin
I have a Controller like this and I want to submit a form with file uploading as well as some form data like label as shown below. Also, I want to do that using @RequestBody so I can use the @Valid annotation on the wrapper as more variables will be added.
我有一个这样的控制器，我想提交一个带有文件上传的表单以及一些表单数据，如标签，如下所示。另外，我想使用 @RequestBody 来做到这一点，这样我就可以在包装器上使用 @Valid 注释，因为将添加更多变量。
public @ResponseBody WebResponse<Boolean> updateEUSettings(
final Locale locale,
@Validated @ModelAttribute final EUPSettingsWrapper endUserPortalSettingsWrapper) {
}
And my wrapper is:
我的包装是：
public class EUPSettingsWrapper {
private String label;
private MultipartFile logo;
// getter , setters..etc...
}
But I would like to convert it into a @RequestBody from ModelAttributes.
但我想将它从 ModelAttributes 转换为 @RequestBody。
The way I'm trying is by having the file upload separated as request parameter like this:
我尝试的方法是将文件上传作为请求参数分开，如下所示：
public @ResponseBody WebResponse<Boolean> updateEUSettings(
final Locale locale,
@Validated @RequestBody final EUPSettingsWrapper endUserPortalSettingsWrapper,
@RequestParam(value = "file1", required = true) final MultipartFile logo) {
endUserPortalSettingsWrapper.setLogo(logo);
// ...
}
In my mock MVC, I am setting:
在我的模拟 MVC 中，我设置：
getMockMvc().perform(fileUpload(uri).file(logo)
.accept(MediaType.APPLICATION_JSON)
.content(JSONUtils.toJSON(wrapper))
.contentType(MediaType.MULTIPART_FORM_DATA))
.andExpect(status().isOk());
But I'm getting an error like this which says:
但我收到这样的错误，其中说：
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'multipart/form-data' not supported
Does anyone have a good idea of how Multipart file uploads can be used with @RequestBody? Anything I am doing wrong above?
有没有人知道如何将多部分文件上传与@RequestBody 一起使用？我在上面做错了什么吗？
回答by geoand
You can actually simplify your life here since all you are doing is submitting a form that contains some fields and file. You don'tneed @RequestBody for what you are trying to do. You can use regular Spring MVC features, so your controller method would look like:
您实际上可以在这里简化您的生活，因为您所做的只是提交一个包含一些字段和文件的表单。你并不需要为你正在尝试做@RequestBody。您可以使用常规的 Spring MVC 功能，因此您的控制器方法将如下所示：
@ResponseBody
public WebResponse<Boolean> updateEUSettings(
Locale locale,
@Valid EUPSettingsWrapper endUserPortalSettingsWrapper,
@RequestParam(value = "file1", required = true) MultipartFile logo
) {
}
The client that submits the request to this controller will need to have a form with enctype="multipart/form-data".
向该控制器提交请求的客户端需要有一个带有enctype="multipart/form-data".
In your Spring MVC test you would write something like this:
在您的 Spring MVC 测试中，您将编写如下内容：
getMockMvc().perform(fileUpload(uri).file("file1", "some-content".getBytes())
.param("someEuSettingsProperty", "someValue")
.param("someOtherEuSettingsProperty", "someOtherValue")
.accept(MediaType.APPLICATION_JSON)
.contentType(MediaType.MULTIPART_FORM_DATA))
.andExpect(status().isOk());
回答by Ankur Jain
Please add the following bean in your spring-servlet.xml to add the support for multipart request.
请在 spring-servlet.xml 中添加以下 bean 以添加对多部分请求的支持。
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
Also don't forget to add the dependency for commons-fileupload jar
另外不要忘记为commons-fileupload jar添加依赖项
回答by hookumsnivy
I couldn't find a way to use @RequestBody.
我找不到使用@RequestBody 的方法。
However, you can do something like this:
但是，您可以执行以下操作：
@RequestMapping(value = "/uploadStuff", method = RequestMethod.POST)
public MyViewDto doStuff(@RequestPart("json") @Valid MyDto dto,
@RequestPart("file") MultipartFile file) { ... }
You can test it like this:
你可以这样测试：
MockMultipartFile jsonFile = new MockMultipartFile("json", "",
"application/json", "{}".getBytes());
MockMultipartFile dataFile = new MockMultipartFile("file", "foo.zip", "application/octet-stream", bytes);
mockMvc.perform(fileUpload("/uploadStuff")
.file(dataFile)
.file(jsonFile))
.andExpect(status().isOk());
回答by Jason Glez
For Spring 4 and later you can do the following to get the full object:
对于 Spring 4 及更高版本，您可以执行以下操作来获取完整对象：
public ResponseEntity<Object> upload(@Payload EUPSettingsWrapper wrapper) {
}
Note: Also should work without the tag
注意：也应该在没有标签的情况下工作
public ResponseEntity<Object> upload(EUPSettingsWrapper wrapper) {
}
回答by Andy B
I struggled a little with this and ended up passing as simple parameters. Fine if you don't have lots to pass in your request:
我对此有点挣扎，最终以简单的参数形式传递。如果您的请求中没有很多要传递的内容，那很好：
myMethod(@RequestParam("file") MultipartFile myFile,
@RequestParam("param1") Float param1, @RequestParam("param2") String param2 {}
