jquery实现上传文件进度条

 <link rel="stylesheet" href="js/bootstrap/bootstrap.min.css" > <script type="text/javascript" src="js/jquery-3.2.1.min.js"></script> <script type="text/javascript" src="js/bootstrap/bootstrap.min.js"></script> <script type="text/javascript" src="js/jquery.form.js"></script>

 <form id="uploadFile" action="uploadFile" enctype="multipart/form-data"> <input type="file" name="file"> <input type="button" value="上传" id="uplodsss"> </form> <div class="progress"> <div id="uploadFile_progressBar" class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" > <span id="uploadFile_rate">0%</span> </div> </div>

 <script type="text/javascript"> $(function(){ $("#uplodsss").click(function(){ debugger $('#uploadFile').ajaxSubmit({ type:'post', url:"uploadFile", processData: false, //需设置为false,因为data值是FormData对象，不需要对数据做处理 contentType: false, //需设置为false,因为是FormData对象，且已经声明了属性enctype="multipart/form-data" resetForm: true, //成功提交后，是否重置所有表单元素的值 uploadProgress: function (event, position, total, percentComplete) { if(percentComplete > 100){ percentComplete = 100; } var percentVal = percentComplete + '%'; $("#uploadFile_rate").html(percentVal); // 文件上传进度显示值 $("#uploadFile_progressBar").width(percentVal); // 进度条状态 }, success:function(data){ alert("上传文件成功！"); $("#uploadFile_progressBar").width("0px"); // 进度条状态 $("#uploadFile_rate").html("0%"); }, error:function(){ alert("上传文件失败，请重试！"); } }); }); }) </script>