SpringMVC上传图片代码实例

<div class="container-fluid">    <!-- <div id="panel-advancedoptions"> -->      <div class="row">        <div class="col-md-12">          <div class="panel panel-midnightblue">            <div class="panel-heading">              <h2>修改头像</h2>            </div>            <div class="panel-body">                <div class="row">                  <div class="col-md-1">                    <button type="button" class="btn btn-primary btn-sm" id="btn_upload" >                      <span class="fa fa-upload"></span> 上传头像图片                    </button>                  </div>                  <div class="col-md-11">                      <h5></h5>（仅限上传单张10M以下png、jpg图片）</h5>                      <input type="file" class="hidden" id="InputFile" />                  </div>                </div>                </br>                <div class="row">                  <div class="col-md-6">                    <img src="images/UserAvatars/robo.jpg" class="img-thumbnail uploadImges" >                  </div>                                  </div>            </div>          </div>        </div>      </div>           <!-- </div> --></div>

$("#btn_upload").click(function(){        $("#InputFile").trigger("click");        openUploads("InputFile");      });      function openUploads(id){        $("#"+id).unbind().change(function(){          var formdata = new FormData();          formdata.append('file',$("#"+id)[0].files[0]); //获取图片信息          //console.log($("#"+id)[0].files[0]);          $.ajax({            type: 'POST',            url: "http://localhost:8078/lifeTrackDB/UploadUserAvatars",            data:formdata,            cache:false,            dataType: 'json',            processData:false,            contentType:false,            success : function (result)            {              console.log(result);              if (result.status)              {                //$('#'+id).attr('src','images/UserAvatars/'+result.message);                alert(result.message);              }              else              {                $.alert(result.message,'');              }            }          });        });      }

@RequestMapping(value="/UploadUserAvatars")@ResponseBodypublic void UploadUserAvatars(HttpServletRequest request,HttpServletResponse response,       @RequestParam(value = "file") List<MultipartFile> files) throws Exception{         String path=System.getProperty("user.dir");      if (null != files || 0 != files.size()) {     for(MultipartFile file:files) {      //System.err.println("文件名：" + file.getOriginalFilename() + "---contentType：" + file.getContentType());       file.transferTo(new File(path+"/UserAvatars/"+file.getOriginalFilename()));      response.getWriter().write("{/"status/": true, /"code/": /"200/",/"message/":/"上传成功/"}");    }    }else {      //response.getWriter().write("handleCallback({/"status/": false, /"code/": /"200/",/"message/":/"上传失败/"})");      response.getWriter().write("{/"status/": false, /"code/": /"200/",/"message/":/"上传失败/"}");    }    }