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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