ajax上传图片到PHP并压缩图片显示的方法

本文实例为大家分享了ajax上传图片到PHP并压缩图片显示的具体代码，供大家参考，具体内容如下

需求就是，上传图片并压缩图片页面效果如下图：

HTML代码

<div id="main">  <div class="demo">   <div class="btn btn-success">    <span>上传图片</span>    <input id="fileupload" type="file" name="mypic">   </div>   <!--加载进度-->   <div class="progress progress-striped">    <span class="progress-bar progress-bar-success bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style=""></span>    <span class="percent">0%</span >   </div>   <!--显示图片-->   <div id="showimg"></div>   <!--删除图片-->   <div class="files"></div>  </div> </div> 

CSS代码和引入的bootstrap

<style type="text/css">  .demo{width:580px; margin:30px auto}  .btn{position: relative;overflow: hidden;margin-right: 4px;}  .btn input {position: absolute;top: 0; right: 0;margin: 0;border: solid transparent;opacity: 0;filter:alpha(opacity=0);}  .progress { position:relative; margin-left:100px; margin-top:-24px; width:200px; border-radius:3px; display:none}  .percent { position:absolute; top:1px; left:2%; color:#fff }  .files{margin:10px 0}  .delimg{margin-left:20px; color:#090; cursor:pointer;margin-top: -6px;} </style> <!--bootstrap.css3.3.7--> <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> 

JS代码

<!--jquery1.8.1-->  <script src="http://code.jquery.com/jquery-1.8.1.min.js"></script>  <!--图片jquery.form.js-->  <script type="text/javascript" src="https://www.helloweba.net/demo/upload/jquery.form.js"></script> <script type="text/javascript">  $(function () {   //进度条百分比加载颜色   var bar = $('.bar');   //进度条百分比   var percent = $('.percent');   //图片显示   var showimg = $('#showimg');   //进度条   var progress = $(".progress");   //新增   var files = $(".files");   var btn = $(".btn span");   $(".demo").wrap("<form id='myupload' action='action.php' method='post' enctype='multipart/form-data'></form>");   //点击上传图片   $("#fileupload").change(function(){    //提交表单    $("#myupload").ajaxSubmit({     dataType: 'json',     beforeSend: function() {       //显示进度条      progress.show();      //进度条为0      var percentVal = '0%';      bar.width(percentVal);      percent.html(percentVal);      btn.html("上传中...");     },     //上传进度     uploadProgress: function(event, position, total, percentComplete) {      //进度条加载长度数据是number型      var percentVal = percentComplete + '%';      bar.width(percentVal)      percent.html(percentVal);     },     success: function(data) {      //上传成功返回参数      files.html("<b>"+data.name+"("+data.size+"k)</b> <span class='delimg btn btn-danger' rel='"+data.pic+"'>删除</span>");      showimg.html("<img src='"+data.pic+"'>");      btn.html("上传图片");     },     error:function(xhr){      //上传失败      btn.html("上传失败");      bar.width('0')      files.html(xhr.responseText);     },     clearForm: true    });   });    //删除图片js   $(".delimg").live('click',function(){    //获取图片地址    var pic = $(this).attr("rel");    $.post("action.php?act=delimg",{imagename:pic},function(msg){     if(msg=='delete'){      files.html("删除成功.");      //删除图片效果      showimg.empty();      //隐藏进度条      progress.hide();     }else{      alert(msg);     }    });   });  }); </script>