jQuery+php+ajax实现无刷新上传文件功能

jQuery+php+ajax实现无刷新上传文件功能，还带有上传进度条动画效果，支持图片、视频等大文件上传。

js代码

 <script type='text/javascript' src='js/jquery-2.0.3.min.js'></script>
 <script type='text/javascript' src='js/jquery.form.js'></script>
 <script type="text/javascript">
  function filesize(ele) {
     var filesize = (ele.files[0].size / 1024/1024).toFixed(2);
     $('#big').html(filesize+"MB");
     $('#text').html(ele.files[0].name);
 }
 $(document).ready(function(e) {
    var progress = $(".progress");
    var progress_bar = $(".progress-bar");
    var percent = $('.percent');
     $("#del").click(function(){
     var objFile=document.getElementsByTagName('input')[2];
      objFile.value="";
      $("#list").hide();
     });
     $("#uploadphoto").change(function(){
         $("#list").show();
     });
    $("#ups").click(function(){
    var file = $("#uploadphoto").val();
    if(file!=""){
      $('#uped').html("上传中……");
        $("#myupload").ajaxSubmit({
           dataType:  'json', //数据格式为json
           beforeSend: function() { //开始上传
               var percentVal = '0%';
               progress_bar.width(percentVal);
               percent.html(percentVal);
           },
           uploadProgress: function(event, position, total, percentComplete) {
               var percentVal = percentComplete + '%'; //获得进度
               progress_bar.width(percentVal); //上传进度条宽度变宽
               percent.html(percentVal); //显示上传进度百分比
           },
           success: function(data) {
             if(data.status == 1){
                 var src = data.url;
                 $('#uped').html("上传成功");
                 //var attstr= '<img src="'+src+'">';
                 //$(".imglist").append(attstr);
                 //$(".res").html("上传图片"+data.name+"成功，图片大小："+data.size+"K,文件地址："+data.url);
             }else{
                 $(".res").html(data.content);
             }
           },
           error:function(xhr){ //上传失败
              alert("上传失败");
           }
       });
     }
     else{
      alert("请选择视频文件");
     }
    }); 

 });
 </script>

upload.php源代码

 <?php 

     $picname = $_FILES['uploadfile']['name'];
     $picsize = $_FILES['uploadfile']['size'];
     if ($picname != "") {
         if ($picsize > 201400000) { //限制上传大小
             echo '{"status":0,"content":"图片大小不能超过2M"}';
             exit;
         }
         $type = strstr($picname, '.'); //限制上传格式
         if ($type != ".gif" && $type != ".jpg" && $type != "png" && $type != ".mp4"&& $type != ".rar") {
             echo '{"status":2,"content":"文件格式不对！"}';
             exit;
         }
         $rand = rand(100, 999);
         $pics = uniqid() . $type; //命名图片名称
         //上传路径
         $pic_path = "images/". $pics;
         move_uploaded_file($_FILES['uploadfile']['tmp_name'], $pic_path);
         $myfile = fopen("1/".date("His")."testfile.txt", "w");
     }
     $size = round($picsize/1024,2); //转换成kb
     echo '{"status":1,"name":"'.$picname.'","url":"'.$pic_path.'","size":"'.$size.'","content":"上传成功"}';
 ?>

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