SPRING REST：由于未找到多部分边界，因此请求被拒绝

Question

我为Spring 3 Rest Multipart文件上载了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。

它引发以下异常：

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**"

如果我在代码的任何部分有误，请告诉我。

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";
    }
}

Answer 1

问题不在你的代码中，而是在你的请求中。你的多部分请求中缺少边界。正如规范中所说：

多部分实体的Content-Type字段需要一个参数“边界”，该参数用于指定封装边界。封装边界定义为一行，该行完全由两个连字符（“-”，十进制代码45）组成，后跟来自Content-Type标头字段的边界参数值。