引入JS

<script type="text/javascript" src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script> 

HTML

<a class="btn" id="btn">上传图片</a>

CSS

.btn{-webkit-border-radius:3px;-moz-border-radius:3px;-ms-border-radius:3px;-o-border-radius:3px;border-radius:3px;background-color:#0cc;color:#fff;display:inline-block;height:28px;line-height:28px;text-align:center;width:72px;transition:background-color .2s linear 0s;border:none;cursor:pointer;margin:0 0 20px} .btn:hover{background-color:#f55;text-decoration:none} .ul_pics li{position:relative;float:left;margin:5px;width:calc(100% / 6 - 10px);border:1px solid #ddd;text-align:center;} .ul_pics li img{max-width:100%;max-height:100%;} .ul_pics li p{position:absolute;bottom:0;overflow:hidden;margin:0;width:100%;background:#ddd;color:#fff;text-overflow:ellipsis;white-space:nowrap;} .progress{position:absolute;top:45%;left:2%;margin:0;width:96%;background:#fff;} .bar{display:block;width:0;height:20px;background-color:#03A9F4;} .percent{position:absolute;top:0;left:45%;display:inline-block;color:#F44336;line-height:20px;} @media (max-width: 900px){.ul_pics li{width:calc(100% / 4 - 10px);}} @media (max-width: 600px){.ul_pics li{width:calc(100% / 3 - 10px);}} 

JS

var uploader = new plupload.Uploader({ //创建实例的构造方法  runtimes: 'html5,flash,silverlight,html4',  //上传插件初始化选用那种方式的优先级顺序  browse_button: 'btn',  // 上传按钮  url: "ajax.php",  //远程上传地址  flash_swf_url: 'plupload/Moxie.swf',  //flash文件地址  silverlight_xap_url: 'plupload/Moxie.xap',  //silverlight文件地址  filters: {      max_file_size: '1gb',      //最大上传文件大小（格式100b, 10kb, 10mb, 1gb）      mime_types: [ //允许文件上传类型      {          title: "files",          extensions: "jpg,png,gif"      }]  },  multi_selection: true,  //true:ctrl多文件上传, false 单文件上传  init: {      FilesAdded: function(up, files) { //文件上传前          if ($("#ul_pics").children("li").length > 30) {              alert("您上传的图片太多了！");              uploader.destroy();          } else {              var li = '';              plupload.each(files,              function(file) { //遍历文件                  li += "<li id='" + file['id'] + "'><div class='progress'><span class='bar'></span><span class='percent'>0%</span></div></li>";              });              $("#ul_pics").append(li);              uploader.start();          }      },      UploadProgress: function(up, file) { //上传中，显示进度条          $("#" + file.id).find('.bar').css({              "width": file.percent + "%"          }).find(".percent").text(file.percent + "%");      },      FileUploaded: function(up, file, info) { //文件上传成功的时候触发          var data = JSON.parse(info.response);          $("#" + file.id).html("<div class='img'><img src='" + data.pic + "'/></div><p>" + data.name + "</p>");      },      Error: function(up, err) { //上传出错的时候触发          alert(err.message);      }  }  });  uploader.init(); 

AJAX.PHP

    <?php $typeArr = array("jpeg","jpg", "png", "gif");//允许上传文件格式  $path = "uploads/";//上传路径  if (isset($_POST)) {      $name = $_FILES['file']['name'];      $size = $_FILES['file']['size'];      $name_tmp = $_FILES['file']['tmp_name'];      if (empty($name)) {          echo json_encode(array("error"=>"您还未选择图片"));          exit;      }      $type = strtolower(substr(strrchr($name, '.'), 1)); //获取文件类型            if (!in_array($type, $typeArr)) {          echo json_encode(array("error"=>"请上传jpg,png或gif类型的图片！"));          exit;      }      if ($size > (10000 * 1024)) {          echo json_encode(array("error"=>"图片大小已超过10000KB！"));          exit;      }            $pic_name = time() . rand(10000, 99999) . "." . $type;//图片名称      $pic_url = $path . $pic_name;//上传后图片路径+名称      if (move_uploaded_file($name_tmp, $pic_url)) { //临时文件转移到目标文件夹             echo json_encode(array("error"=>"0","pic"=>$pic_url,"name"=>$pic_name));     } else {             echo json_encode(array("error"=>"上传有误，请检查服务器配置！"));          }; }; ?>`请输入代码`   

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