SPRING REST：请求被拒绝，因为没有找到多部分边界
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SPRING REST: The request was rejected because no multipart boundary was found
提问by Cherry
I did a POC for spring 3 rest multipart file upload. Its working fine. But when i tried integrating with my application i am facing issues.
我为 spring 3 rest 多部分文件上传做了一个 POC。它的工作正常。但是当我尝试与我的应用程序集成时，我遇到了问题。
It throws following exception:
它抛出以下异常：
org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request;
nested exception is org.apache.commons.fileupload.FileUploadException:
the request was rejected because no multipart boundary was found**"
Please let me know if I am wrong in any part of my code.
如果我的代码的任何部分有错，请告诉我。
Beans:
豆子：
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="1" />
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
<entry key="file" value="multipart/mixed" />
</map>
</property>
</bean>
<!-- multipart resolver -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="50000000" />
</bean>
Controller:
控制器：
@Controller
public class MultipleFilesRecieve {
@RequestMapping ( value = "/saveMultiple", method = RequestMethod.POST )
public String save( FileUploadForm uploadForm ) {
List<MultipartFile> files = uploadForm.getFiles( );
List<String> fileNames = new ArrayList<String>( );
if ( null != files && files.size( ) > 0 ) {
for ( MultipartFile multipartFile : files ) {
String fileName = multipartFile.getOriginalFilename( );
fileNames.add( fileName );
}
}
return "multifileSuccess";
}
}
回答by sermolaev
The problem isn't in your code - it's in your request. You're missing boundary in your multipart request. As it said in specification:
问题不在您的代码中 - 而在您的请求中。您在多部分请求中缺少边界。正如它在规范中所说：
The Content-Type field for multipart entities requires one parameter, "boundary", which is used to specify the encapsulation boundary. The encapsulation boundary is defined as a line consisting entirely of two hyphen characters ("-", decimal code 45) followed by the boundary parameter value from the Content-Type header field.
多部分实体的 Content-Type 字段需要一个参数“边界”，用于指定封装边界。封装边界定义为完全由两个连字符（“-”，十进制代码 45）组成的行，后跟来自 Content-Type 头字段的边界参数值。
回答by naXa
@sermolaev is right in his answer.
@sermolaev 的回答是对的。
I want to share my experience related to this problem. I've encountered this problem in Postman, but I could not understand the root cause for it for a long time. My request template seemed to be correct cause Postman included boundaryin it...
我想分享我与这个问题相关的经验。我在 Postman 中遇到过这个问题，但是我很长时间都无法理解它的根本原因。我的请求模板似乎是正确的，因为其中包含邮递员boundary...
Eventually I've discovered that when you're specifying Content-Type=multipart/formheader by yourself, it overrides the one added automatically by Postman. And this leads to the same error as yours. My solution was as simple as removing Content-Typeheader.
最终我发现当您Content-Type=multipart/form自己指定标题时，它会覆盖邮递员自动添加的标题。这会导致与您相同的错误。我的解决方案就像删除Content-Type标题一样简单。
回答by Ankit Rai
Don't supply Content-Typeheader in the request. It will work.
不要Content-Type在请求中提供标头。它会起作用。
回答by unify
Are you using any security filters? My problem was solved by removing the Security Filter Chain. From this:
您是否使用任何安全过滤器？通过删除安全过滤器链解决了我的问题。由此：
this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).addFilters(this.springSecurityFilterChain).build();
to this:
对此：
this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
I opened an issue where I explain the details: https://jira.spring.io/browse/SPR-12114
我打开了一个问题，我解释了细节：https: //jira.spring.io/browse/SPR-12114
