SPRING REST：请求被拒绝，因为未找到多部分边界

我为 Spring 3 Rest 多部分文件上传做了一个 POC。它工作正常。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**"

如果我的代码的任何部分有错误，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>

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";
    }
}

问题不在于您的代码，而在于您的请求。您的多部分请求中缺少边界。正如它所说规格 http://www.w3.org/Protocols/rfc1341/7_2_Multipart.html:

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。这 封装边界定义为完全由两个组成的线 连字符（“-”，十进制代码 45）后跟边界 Content-Type 标头字段中的参数值。

This https://stackoverflow.com/questions/9081079/rest-http-post-multipart-with-jsonand this https://stackoverflow.com/questions/9344455/unable-to-send-a-multipart-mixed-request-to-spring-mvc-based-rest-service帖子也应该有帮助。