Spring MVC REST的文件上传问题

我有基于Spring MVC的REST应用程序。尝试上传文件。这是代码片段。Spring MVC REST的文件上传问题

webmvc-config.xml中

<bean 
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver" 
    id="multipartResolver"> 
    <property name="maxUploadSize" value="2000000" /> 
</bean> 

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> 
    <property name="order" value="0" /> 
    <property name="defaultContentType"> 
     <ref bean="htmlMediaType" /> 
    </property> 
    <property name="mediaTypes"> 
     <map> 
      <entry key="json" value="application/json" /> 
      <entry key="xml" value="application/xml" /> 
      <entry key="file" value="multipart/form-data"/> 
     </map> 
    </property> 
    <property name="defaultViews"> 
     <list> 
      <bean 
       class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" /> 
      <bean class="org.springframework.web.servlet.view.xml.MarshallingView"> 
       <property name="marshaller"> 
        <bean class="org.springframework.oxm.castor.CastorMarshaller" /> 
       </property> 
      </bean> 
     </list> 
    </property>

FileUploadController.java

@Controller 
@RequestMapping("/appfiles") 
public class FileUploadController { 

private String saveDirectory = "C:/Downloads/"; 
@RequestMapping(value = "/appfiles", method = RequestMethod.POST, consumes="multipart/form-data", produces="application/json") 
public ResponseEntity<List<Map<String, String>>> save(
     @RequestParam("file") MultipartFile file) { 
    System.out.println("received file with original filename: " + file.getOriginalFilename()); 

    // List<MultipartFile> files = uploadForm.getFiles(); 
    List<Map<String, String>> response = new ArrayList<Map<String, String>>(); 
    Map<String, String> responseMap = new HashMap<String, String>(); 

    List<String> fileNames = new ArrayList<String>(); 

    if (null != file) { 
     // for (MultipartFile multipartFile : files) { 

     String fileName = file.getOriginalFilename(); 
     fileNames.add(fileName); 

     try { 
      file.transferTo(new File(saveDirectory 
        + file.getOriginalFilename())); 
     } catch (IllegalStateException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 
    responseMap.put("displayText", file.getOriginalFilename()); 
    responseMap.put("fileSize", ""+file.getSize()); 
    response.add(responseMap); 

    HttpHeaders httpHeaders = new HttpHeaders(); 
    httpHeaders.add("Accept", "application/json"); 
    return new ResponseEntity<List<Map<String, String>>>(response, httpHeaders, HttpStatus.OK); 
} 
}

我收到以下错误，当我使用Chrome扩展 “邮差”

Could not parse multipart servlet request; nested exception is  org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found 
org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest(CommonsMultipartResolver.java:163) 
org.springframework.web.multipart.commons.CommonsMultipartResolver.resolveMultipart(CommonsMultipartResolver.java:139) 
org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1020) 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:883) 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:641) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

postname提交与以下细节进行：

Headers 
conent-type: multipart/form-data 
Form-data: 
file=<filename.txt> 
Method=POST

能否请你让我知道什么是错我的代码？

感谢&问候

来源

2013-02-25 kalyanvgopal

你是如何发布你的数据？ – gouki 2013-02-25 10:57:53

我使用postmaster插件作为我的REST客户端。我在头字段中设置了content-type = multipart/form-data和accept = application/json。使用表单数据字段上传文件。我在form-data中创建了一个名为“file”的属性，并在那里上传文件。并且在进行“POST”调用时没有设置其他属性。 – kalyanvgopal 2013-02-25 12:07:26

这听起来像是请求缺少表单边界。你有没有办法查看实际的HTTP请求？我有一种感觉，你的要求缺少一些关键部分。此外，它可能会帮助尝试使用虚拟HTML表单进行发布，只是获取请求应该看起来像什么的基线。 – CodeChimp 2013-02-25 13:47:24

我也面临着同样的问题，但是当我尝试没有任何头值是做工精细。

来源

2013-12-04 03:14:24 Channa

Spring MVC REST的文件上传问题

回答

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