jQuery+php+ajax实现无刷新上传文件实例

jQuery+php+ajax实现无刷新上传文件实例，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;
                $('#uped').html("上传成功");
                //var attstr= '';
                //$(".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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