弹簧休息：请求被拒绝，因为没有找到多边界 [英] SPRING REST: The request was rejected because no multipart boundary was found

问题描述

我做了一个POC的春天3休息多部分文件上传。它的工作正常。但是，当我尝试与我的应用程序集成我正面临着问题。

它引发以下异常：

  org.springframework.web。 multipart.MultipartException：无法解析多部分的servlet请求; 
嵌套的异常是org.apache.commons.fileupload.FileUploadException：
请求被拒绝，因为没有找到multipart边界**
  

请让我知道，如果我在我的代码的任何部分是错误的。

豆：

 < bean class =org.springframework.web.servlet.view.ContentNegotiatingViewResolver> 
< property name =order value =1/> 
< property name =mediaTypes> 
< map> 
< entry key =jsonvalue = /> 
< entry key =xmlvalue =application / xml/> 
< entry key =filevalue =multipart / mixed/> 
< / map> 
< / property> 
< / bean> 
<！ -  multipart resolver  - > 
< bean id =multipartResolver class =org.springframework.web.multipart.commons.CommonsMultipartResolver> 
<！ - 其中一个可用的属性;最大文件大小（以字节为单位）> 
<属性NAME =maxUpl oadSizevalue =50000000/> 
< / bean> 
  

控制器：

  @Controller 
 public class MultipleFilesRecieve {
 @RequestMapping（value =/ saveMultiple，method = RequestMethod.POST）
 public String save（FileUploadForm uploadForm）{
列出< MultipartFile> files = uploadForm.getFiles（）; 
列表< String> fileNames = new ArrayList< String>（）; （）; 
 if（null！= files&& files.size（）> 0）{
 for（MultipartFile multipartFile：files）{
 String fileName = multipartFile.getOriginalFilename（）; 
 fileNames.add（fileName）; 
} 
} 
返回multifileSuccess; 
 
 
 $ / code $ / pre 
 
解决方案
问题不在你的代码中 - 这是你的要求。您在多部分请求中缺少边界。正如在规范中所说： 
 
 
 
 
多部分实体的Content-Type字段需要一个参数
boundary，用于指定封装边界。 
封装边界被定义为完全由两个
连字符（ - ，十进制码45）组成的行，接着是来自Content-Type头部字段的边界
参数值。 / p> 
 
 这和的帖子也应该是有帮助的。
 
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. 

It throws following exception:
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.

Beans:
<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:
@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";
    }
}

解决方案
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:

  
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.
This and this posts should also be helpful.

                        
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