上传文件时不存在必需的多部分文件参数"file"

Question

我正在尝试上传文件，但遇到Required MultipartFile parameter 'file' is not present400Bad Requestorg.springframework.web.bind.MissingServletRequestParameterException.

我的代码在这里：

<form id="uploadrecords" method="post" enctype="multipart/form-data">                     
<div class="col-md-12">
<div class="form-group" style="margin-top: 11px !important;">
<label for="uploadfile" class="col-md-4 control-label"><span class="mandatory"></span>File to upload:</label>
<div class="col-md-6">
<input type="file" class="filestyle" data-buttonName="btn-primary" name="file" id="upload" accept="*"/>
</div>
</div>
<div class="form-actions" style="margin-top: 51px;margin-left: 358px;">
<button type="submit"  class="btn btn-success" style="padding: 6px 12px;"   id="upload" ><i class="fa fa-cloud-upload"></i> Upload</button>
<button type="button"  class="btn btn-danger"  style="padding: 6px 12px;" id="cancel"  ><i class="fa fa-ban"></i> Cancel</button> 
</div>
</div>
</form>

Jquery代码在这里：

$("form#uploadrecords").submit(function(){                                  
var formData = new FormData($(this)[0]);                                    
$.ajax({
url : '/uploadfile', 
type: 'POST',
data: formData,
async: false,
beforeSend: beforeSendHandler,
success: function (data) {
var msg=data.msg;
var obj=data.obj;   
if(obj != 0){
$("#countfail").html(obj);
$("#download-modal").modal('show');
}else{
bootbox.alert(msg);
}
},
cache: false,
contentType: false,
processData: false
});
});

爪哇代码：

@RequestMapping(value = "/uploadfile", headers = "Content-Type=multipart/form-data", method = RequestMethod.POST)
public @ResponseBody StatusResponse upload( @RequestParam(value = "file") MultipartFile file, HttpServletRequest request,
HttpServletResponse response) throws IOException, NoSuchFieldException, SecurityException, ParseException {
StatusResponse sr = new StatusResponse();
System.out.println("filename::::" + file.getOriginalFilename());
//my logic here
return sr;
}

它没有命中控制器类。 我在Firebug console中发现错误。

我正在使用spring boot和jboss-eap-6.4.

我的代码出了什么问题。如何解决这个问题？

Answer 1

如果您使用的是@EnableAutoConfiguration那么您需要执行以下操作，如此处所述 https://github.com/spring-projects/spring-boot/issues/2958

@EnableAutoConfiguration(exclude = {多部分自动配置.class}) 定义以下 bean

@Bean(name = "multipartResolver") public CommonsMultipartResolver commonsMultipartResolver(){ CommonsMultipartResolverresolver = new CommonsMultipartResolver(); resolver.setMaxUploadSize(50*1024*1024); return resolver ; }

@Bean @Order(0) public MultipartFilter multipartFilter(){ MultipartFiltermultipartFilter = new MultipartFilter(); multipartFilter.setMultipartResolverBeanName("multipartResolver"); return multipartFilter; }