jquery:上传文件

$.ajax({
            url : form.attr('action'),
            type : 'POST',
            cache : false,
            data : new FormData($('#form')[0]),
            processData : false,
            contentType : false,
            success : function(result) {
                // do something
            }
        });

<form id="form" autocomplete="off" class="form-horizontal"
                    role="form" th:action="@{/app/wuliu/yundan/save/}" enctype="multipart/form-data">