前端通过Ajax上传文件

前端代码：

<input class="txt" type="file" onchange="upload(this.files)" id="institutionNaturalFile" multiple="multiple"><script>// 上传
function upload(files,type) {alert("进入上传。。。=="+files);var formData = new FormData();formData.append("file", files[0]);$.ajax({type:"post",url:"/java/upload",data:formData,cache:false,processData: false,contentType : false,success: function(json){alert(json);}});
}
<script>

后端就不写了  用

CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());

接收就行