webuploader实现文件上传

在项目开发中需要实现图片上传功能，在网上寻找了很多解决方案，最终决定使用webuploader来实现。改插件的特点是支持拖拽添加文件。

项目中需要使用的文件都在http://fex.baidu.com/webuploader/download.html中的Git项目包中。打开这个页面可以看到：

 

 点击Git项目包下载源代码，找到examples/image-upload目录，demo和需要的文件都在这个目录里面，此外文件夹dist中放的webuploader的所有js文件和css文件。

 把dist中的所有文件和image-upload中的所有文件都放到项目中的静态资源文件目录中，我自己的是/static/webuploader/。

 

下面是相关的代码：

1. html代码：

<div id="wrapper">
    <div id="container">
        <!--头部，相册选择和格式选择-->

            <div id="uploader">
                <div class="queueList">
                    <div id="dndArea" class="placeholder">
                        <div id="filePicker"></div>
                        <p>或将照片拖到这里，单次最多可选300张</p>
                    </div>
                </div>
                <div class="statusBar" style="display:none;">
                    <div class="progress">
                        <span class="text">0%</span>
                        <span class="percentage"></span>
                    </div><div class="info"></div>
                    <div class="btns">
                        <div id="filePicker2"></div><div class="uploadBtn">开始上传</div>
                    </div>
                </div>
            </div>

    </div>
</div>

2. js、css代码引入：

<link rel="stylesheet" type="text/css" href="/static/webuploader/webuploader.css" />
<link rel="stylesheet" type="text/css" href="/static/webuploader/style.css" />

<script type="text/javascript" src="/static/webuploader/webuploader.js"></script>
<script type="text/javascript" src="/static/webuploader/upload.js"></script>

说明：uploader.js代码只需要修改 WebUploader.create()中的server项，把该项换成你自己的后端处理路径
uploader.js代码 ： //这里的js代码是上传页面使用的

(function( $ ){
    //alert(drawId);
    var imageArr = [];
    // 当domReady的时候开始初始化
    $(function() {
        var $wrap = $('#uploader'),

            // 图片容器
            $queue = $( '<ul class="filelist"></ul>' )
                .appendTo( $wrap.find( '.queueList' ) ),

            // 状态栏，包括进度和控制按钮
            $statusBar = $wrap.find( '.statusBar' ),

            // 文件总体选择信息。
            $info = $statusBar.find( '.info' ),

            // 上传按钮
            $upload = $wrap.find( '.uploadBtn' ),

            // 没选择文件之前的内容。
            $placeHolder = $wrap.find( '.placeholder' ),

            $progress = $statusBar.find( '.progress' ).hide(),

            // 添加的文件数量
            fileCount = 0,

            // 添加的文件总大小
            fileSize = 0,

            // 优化retina, 在retina下这个值是2
            ratio = window.devicePixelRatio || 1,

            // 缩略图大小
            thumbnailWidth = 110 * ratio,
            thumbnailHeight = 110 * ratio,

            // 可能有pedding, ready, uploading, confirm, done.
            state = 'pedding',

            // 所有文件的进度信息，key为file id
            percentages = {},
            // 判断浏览器是否支持图片的base64
            isSupportBase64 = ( function() {
                var data = new Image();
                var support = true;
                data.onload = data.onerror = function() {
                    if( this.width != 1 || this.height != 1 ) {
                        support = false;
                    }
                }
                data.src = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==";
                return support;
            } )(),

            // 检测是否已经安装flash，检测flash的版本
            flashVersion = ( function() {
                var version;

                try {
                    version = navigator.plugins[ 'Shockwave Flash' ];
                    version = version.description;
                } catch ( ex ) {
                    try {
                        version = new ActiveXObject('ShockwaveFlash.ShockwaveFlash')
                                .GetVariable('$version');
                    } catch ( ex2 ) {
                        version = '0.0';
                    }
                }
                version = version.match( /\d+/g );
                return parseFloat( version[ 0 ] + '.' + version[ 1 ], 10 );
            } )(),

            supportTransition = (function(){
                var s = document.createElement('p').style,
                    r = 'transition' in s ||
                            'WebkitTransition' in s ||
                            'MozTransition' in s ||
                            'msTransition' in s ||
                            'OTransition' in s;
                s = null;
                return r;
            })(),

            // WebUploader实例
            uploader;

        if ( !WebUploader.Uploader.support('flash') && WebUploader.browser.ie ) {

            // flash 安装了但是版本过低。
            if (flashVersion) {
                (function(container) {
                    window['expressinstallcallback'] = function( state ) {
                        switch(state) {
                            case 'Download.Cancelled':
                                alert('您取消了更新！')
                                break;

                            case 'Download.Failed':
                                alert('安装失败')
                                break;

                            default:
                                alert('安装已成功，请刷新！');
                                break;
                        }
                        delete window['expressinstallcallback'];
                    };

                    var swf = './expressInstall.swf';
                    // insert flash object
                    var html = '<object type="application/' +
                            'x-shockwave-flash" data="' +  swf + '" ';

                    if (WebUploader.browser.ie) {
                        html += 'classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" ';
                    }

                    html += 'width="100%" height="100%" style="outline:0">'  +
                        '<param name="movie" value="' + swf + '" />' +
                        '<param name="wmode" value="transparent" />' +
                        '<param name="allowscriptaccess" value="always" />' +
                    '</object>';

                    container.html(html);

                })($wrap);

            // 压根就没有安转。
            } else {
                $wrap.html('<a href="http://www.adobe.com/go/getflashplayer" target="_blank" border="0"><img alt="get flash player" src="http://www.adobe.com/macromedia/style_guide/images/160x41_Get_Flash_Player.jpg" /></a>');
            }

            return;
        } else if (!WebUploader.Uploader.support()) {
            alert( 'Web Uploader 不支持您的浏览器！');
            return;
        }

        // 实例化
        uploader = WebUploader.create({
            pick: {
                id: '#filePicker',
                label: '点击选择图片'
            },
            formData: {
                uid: 123
            },
            dnd: '#uploader .queueList',
            paste: '#uploader',
            swf: '../../dist/Uploader.swf',
            chunked: false,
            chunkSize: 512 * 1024,
server: '/pdm/draw/webuploader', //这里是需要修改的地方
            // runtimeOrder: 'flash',

            // accept: {
            //     title: 'Images',
            //     extensions: 'gif,jpg,jpeg,bmp,png',
            //     mimeTypes: 'image/*'
            // },

            // 禁掉全局的拖拽功能。这样不会出现图片拖进页面的时候，把图片打开。
            disableGlobalDnd: true,
            fileNumLimit: 300,
            fileSizeLimit: 200 * 1024 * 1024,    // 200 M
            fileSingleSizeLimit: 50 * 1024 * 1024    // 50 M
        });

        // 拖拽时不接受 js, txt 文件。
        uploader.on( 'dndAccept', function( items ) {
            var denied = false,
                len = items.length,
                i = 0,
                // 修改js类型
                unAllowed = 'text/plain;application/javascript ';

            for ( ; i < len; i++ ) {
                // 如果在列表里面
                if ( ~unAllowed.indexOf( items[ i ].type ) ) {
                    denied = true;
                    break;
                }
            }

            return !denied;
        });

        uploader.on('dialogOpen', function() {
            console.log('here');
        });

        // uploader.on('filesQueued', function() {
        //     uploader.sort(function( a, b ) {
        //         if ( a.name < b.name )
        //           return -1;
        //         if ( a.name > b.name )
        //           return 1;
        //         return 0;
        //     });
        // });

        // 添加“添加文件”的按钮，
        uploader.addButton({
            id: '#filePicker2',
            label: '继续添加'
        });

        uploader.on('ready', function() {
            window.uploader = uploader;
        });

        // 当有文件添加进来时执行，负责view的创建
        function addFile( file ) {
            console.log(file);
            var $li = $( '<li id="' + file.id + '">' +
                    '<p class="title">' + file.name + '</p>' +
                    '<p class="imgWrap"></p>'+
                    '<p class="progress"><span></span></p>' +
                    '</li>' ),

                $btns = $('<div class="file-panel">' +
                    '<span class="cancel">删除</span>' +
                    '<span class="rotateRight">向右旋转</span>' +
                    '<span class="rotateLeft">向左旋转</span></div>').appendTo( $li ),
                $prgress = $li.find('p.progress span'),
                $wrap = $li.find( 'p.imgWrap' ),
                $info = $('<p class="error"></p>'),

                showError = function( code ) {
                    switch( code ) {
                        case 'exceed_size':
                            text = '文件大小超出';
                            break;

                        case 'interrupt':
                            text = '上传暂停';
                            break;

                        default:
                            text = '上传失败，请重试';
                            break;
                    }

                    $info.text( text ).appendTo( $li );
                };

            if ( file.getStatus() === 'invalid' ) {
                showError( file.statusText );
            } else {
                // @todo lazyload
                $wrap.text( '预览中' );
                uploader.makeThumb( file, function( error, src ) {
                    var img;

                    if ( error ) {
                        $wrap.text( '不能预览' );
                        return;
                    }

                    if( isSupportBase64 ) {
                        img = $('<img src="'+src+'">');
                        $wrap.empty().append( img );
                    } else {
                        $.ajax('../../server/preview.php', {
                            method: 'POST',
                            data: src,
                            dataType:'json'
                        }).done(function( response ) {
                            if (response.result) {
                                img = $('<img src="'+response.result+'">');
                                $wrap.empty().append( img );
                            } else {
                                $wrap.text("预览出错");
                            }
                        });
                    }
                }, thumbnailWidth, thumbnailHeight );

                percentages[ file.id ] = [ file.size, 0 ];
                file.rotation = 0;
            }

            file.on('statuschange', function( cur, prev ) {
                if ( prev === 'progress' ) {
                    $prgress.hide().width(0);
                } else if ( prev === 'queued' ) {
                    $li.off( 'mouseenter mouseleave' );
                    $btns.remove();
                }

                // 成功
                if ( cur === 'error' || cur === 'invalid' ) {
                    console.log( file.statusText );
                    showError( file.statusText );
                    percentages[ file.id ][ 1 ] = 1;
                } else if ( cur === 'interrupt' ) {
                    showError( 'interrupt' );
                } else if ( cur === 'queued' ) {
                    $info.remove();
                    $prgress.css('display', 'block');
                    percentages[ file.id ][ 1 ] = 0;
                } else if ( cur === 'progress' ) {
                    $info.remove();
                    $prgress.css('display', 'block');
                } else if ( cur === 'complete' ) {
                    $prgress.hide().width(0);
                    $li.append( '<span class="success"></span>' );
                }

                $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
            });

            $li.on( 'mouseenter', function() {
                $btns.stop().animate({height: 30});
            });

            $li.on( 'mouseleave', function() {
                $btns.stop().animate({height: 0});
            });

            $btns.on( 'click', 'span', function() {
                var index = $(this).index(),
                    deg;

                switch ( index ) {
                    case 0:
                        uploader.removeFile( file );
                        return;

                    case 1:
                        file.rotation += 90;
                        break;

                    case 2:
                        file.rotation -= 90;
                        break;
                }

                if ( supportTransition ) {
                    deg = 'rotate(' + file.rotation + 'deg)';
                    $wrap.css({
                        '-webkit-transform': deg,
                        '-mos-transform': deg,
                        '-o-transform': deg,
                        'transform': deg
                    });
                } else {
                    $wrap.css( 'filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ (~~((file.rotation/90)%4 + 4)%4) +')');
                    // use jquery animate to rotation
                    // $({
                    //     rotation: rotation
                    // }).animate({
                    //     rotation: file.rotation
                    // }, {
                    //     easing: 'linear',
                    //     step: function( now ) {
                    //         now = now * Math.PI / 180;

                    //         var cos = Math.cos( now ),
                    //             sin = Math.sin( now );

                    //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
                    //     }
                    // });
                }


            });

            $li.appendTo( $queue );
        }

        // 负责view的销毁
        function removeFile( file ) {
            var $li = $('#'+file.id);

            delete percentages[ file.id ];
            updateTotalProgress();
            $li.off().find('.file-panel').off().end().remove();
        }

        function updateTotalProgress() {
            var loaded = 0,
                total = 0,
                spans = $progress.children(),
                percent;

            $.each( percentages, function( k, v ) {
                total += v[ 0 ];
                loaded += v[ 0 ] * v[ 1 ];
            } );

            percent = total ? loaded / total : 0;


            spans.eq( 0 ).text( Math.round( percent * 100 ) + '%' );
            spans.eq( 1 ).css( 'width', Math.round( percent * 100 ) + '%' );
            updateStatus();
        }

        function updateStatus() {
            var text = '', stats;

            if ( state === 'ready' ) {
                text = '选中' + fileCount + '张图片，共' +
                        WebUploader.formatSize( fileSize ) + '。';
            } else if ( state === 'confirm' ) {
                stats = uploader.getStats();
                if ( stats.uploadFailNum ) {
                    text = '已成功上传' + stats.successNum+ '张照片至XX相册，'+
                        stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
                }

            } else {
                stats = uploader.getStats();
                text = '共' + fileCount + '张（' +
                        WebUploader.formatSize( fileSize )  +
                        '），已上传' + stats.successNum + '张';

                if ( stats.uploadFailNum ) {
                    text += '，失败' + stats.uploadFailNum + '张';
                }
            }

            $info.html( text );
        }

        function setState( val ) {
            var file, stats;

            if ( val === state ) {
                return;
            }

            $upload.removeClass( 'state-' + state );
            $upload.addClass( 'state-' + val );
            state = val;

            switch ( state ) {
                case 'pedding':
                    $placeHolder.removeClass( 'element-invisible' );
                    $queue.hide();
                    $statusBar.addClass( 'element-invisible' );
                    uploader.refresh();
                    break;

                case 'ready':
                    $placeHolder.addClass( 'element-invisible' );
                    $( '#filePicker2' ).removeClass( 'element-invisible');
                    $queue.show();
                    $statusBar.removeClass('element-invisible');
                    uploader.refresh();
                    break;

                case 'uploading':
                    $( '#filePicker2' ).addClass( 'element-invisible' );
                    $progress.show();
                    $upload.text( '暂停上传' );
                    break;

                case 'paused':
                    $progress.show();
                    $upload.text( '继续上传' );
                    break;

                case 'confirm':
                    $progress.hide();
                    $( '#filePicker2' ).removeClass( 'element-invisible' );
                    $upload.text( '开始上传' );

                    stats = uploader.getStats();
                    if ( stats.successNum && !stats.uploadFailNum ) {
                        setState( 'finish' );
                        return;
                    }
                    break;
                case 'finish':
                    $progress.hide();
                    stats = uploader.getStats();
                    if ( stats.successNum ) {
                        console.log(stats);
                        alert( '上传成功' );
                    } else {
                        // 没有成功的图片，重设
                        state = 'done';
                        location.reload();
                    }
                    break;
                case 'success':
                    stats = uploader;
                    // console.log(stats);
                    break;
            }

            updateStatus();
        }

        uploader.onUploadProgress = function( file, percentage ) {
            var $li = $('#'+file.id),
                $percent = $li.find('.progress span');

            $percent.css( 'width', percentage * 100 + '%' );
            percentages[ file.id ][ 1 ] = percentage;
            updateTotalProgress();
        };

        uploader.onFileQueued = function( file ) {
            fileCount++;
            fileSize += file.size;

            if ( fileCount === 1 ) {
                $placeHolder.addClass( 'element-invisible' );
                $statusBar.show();
            }

            addFile( file );
            setState( 'ready' );
            updateTotalProgress();
        };

        uploader.onFileDequeued = function( file ) {
            fileCount--;
            fileSize -= file.size;

            if ( !fileCount ) {
                setState( 'pedding' );
            }

            removeFile( file );
            updateTotalProgress();

        };

        uploader.on( 'all', function( type ) {
            var stats;
            switch( type ) {
                case 'uploadFinished':
                    setState( 'confirm' );
                    break;

                case 'startUpload':
                    setState( 'uploading' );
                    break;

                case 'stopUpload':
                    setState( 'paused' );
                    break;
                case 'uploadSuccess':
                    setState('success');
                    break;

            }
        });

        uploader.onError = function( code ) {
            alert( 'Eroor: ' + code );
        };

        //单个文件上传成功回调
        uploader.onUploadSuccess = function(file, response) {
            //将文件名添加到全局数组imageArr中
            imageArr.push(response.data);
            //将数组转为字符串
            var pathStr = imageArr.join(',');
            //console.log(pathStr); return false;
            $('#filepaths').val(pathStr);
        }

        $upload.on('click', function() {
            if ( $(this).hasClass( 'disabled' ) ) {
                return false;
            }

            if ( state === 'ready' ) {
                uploader.upload();
            } else if ( state === 'paused' ) {
                uploader.upload();
            } else if ( state === 'uploading' ) {
                uploader.stop();
            }
        });

        $info.on( 'click', '.retry', function() {
            uploader.retry();
        } );

        $info.on( 'click', '.ignore', function() {
            alert( 'todo' );
        } );

        $upload.addClass( 'state-' + state );
        updateTotalProgress();
    });

})( jQuery );

3. PHP后端代码：

public function webuploader() {
    //上传图纸
    $file = $this->request->file('file');
    //dump($file);die;
    if ($file) {
        $path = ROOT_PATH . 'public' . DS . 'files';
        // 移动到框架应用根目录/public/files/ 目录下
        try{
            $info = $file->validate(['size'=>20971520,'ext'=>'jpg,png,dwg'])->move($path,'');
            //dump($file->getInfo());die;
            if ($info) {
                $fileName = str_replace("\\", '/', $info -> getSaveName());
                $name = '/files/'.$fileName;
                return json(['code'=>0, 'data'=>$name, 'msg' => '上传成功']);
            }
        }catch (\Exception  $e){
            // 上传失败获取错误信息
            return json(['code'=>1, 'msg'=>$e->getMessage()]) ;
        }
    } else {
        return json(['code'=>1, 'msg'=>'上传失败']);
    }
}

4. 以上的是实现了文件上传，但是在项目中还要有编辑功能，同样也是使用webuploader显示你上传过的图片。与上面的唯一区别就是uploader.js文件。编辑页面中使用uploader_edit.js文件

   uploader_edit.js代码：

(function ($) {
    //alert(drawId);
    var imageArr = [];
    // 当domReady的时候开始初始化
    $(function () {
        var $wrap = $('#uploader'),

            // 图片容器
            $queue = $('<ul class="filelist"></ul>')
                .appendTo($wrap.find('.queueList')),

            // 状态栏，包括进度和控制按钮
            $statusBar = $wrap.find('.statusBar'),

            // 文件总体选择信息。
            $info = $statusBar.find('.info'),

            // 上传按钮
            $upload = $wrap.find('.uploadBtn'),

            // 没选择文件之前的内容。
            $placeHolder = $wrap.find('.placeholder'),

            $progress = $statusBar.find('.progress').hide(),

            // 添加的文件数量
            fileCount = 0,

            // 添加的文件总大小
            fileSize = 0,

            // 优化retina, 在retina下这个值是2
            ratio = window.devicePixelRatio || 1,

            // 缩略图大小
            thumbnailWidth = 110 * ratio,
            thumbnailHeight = 110 * ratio,

            // 可能有pedding, ready, uploading, confirm, done.
            state = 'pedding',

            // 所有文件的进度信息，key为file id
            percentages = {},
            // 判断浏览器是否支持图片的base64
            isSupportBase64 = (function () {
                var data = new Image();
                var support = true;
                data.onload = data.onerror = function () {
                    if (this.width != 1 || this.height != 1) {
                        support = false;
                    }
                }
                data.src = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==";
                return support;
            })(),

            // 检测是否已经安装flash，检测flash的版本
            flashVersion = (function () {
                var version;

                try {
                    version = navigator.plugins['Shockwave Flash'];
                    version = version.description;
                } catch (ex) {
                    try {
                        version = new ActiveXObject('ShockwaveFlash.ShockwaveFlash')
                            .GetVariable('$version');
                    } catch (ex2) {
                        version = '0.0';
                    }
                }
                version = version.match(/\d+/g);
                return parseFloat(version[0] + '.' + version[1], 10);
            })(),

            supportTransition = (function () {
                var s = document.createElement('p').style,
                    r = 'transition' in s ||
                        'WebkitTransition' in s ||
                        'MozTransition' in s ||
                        'msTransition' in s ||
                        'OTransition' in s;
                s = null;
                return r;
            })(),

            // WebUploader实例
            uploader;

        if (!WebUploader.Uploader.support('flash') && WebUploader.browser.ie) {

            // flash 安装了但是版本过低。
            if (flashVersion) {
                (function (container) {
                    window['expressinstallcallback'] = function (state) {
                        switch (state) {
                            case 'Download.Cancelled':
                                alert('您取消了更新！')
                                break;

                            case 'Download.Failed':
                                alert('安装失败')
                                break;

                            default:
                                alert('安装已成功，请刷新！');
                                break;
                        }
                        delete window['expressinstallcallback'];
                    };

                    var swf = './expressInstall.swf';
                    // insert flash object
                    var html = '<object type="application/' +
                        'x-shockwave-flash" data="' + swf + '" ';

                    if (WebUploader.browser.ie) {
                        html += 'classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" ';
                    }

                    html += 'width="100%" height="100%" style="outline:0">' +
                        '<param name="movie" value="' + swf + '" />' +
                        '<param name="wmode" value="transparent" />' +
                        '<param name="allowscriptaccess" value="always" />' +
                        '</object>';

                    container.html(html);

                })($wrap);

                // 压根就没有安转。
            } else {
                $wrap.html('<a href="http://www.adobe.com/go/getflashplayer" target="_blank" border="0"><img alt="get flash player" src="http://www.adobe.com/macromedia/style_guide/images/160x41_Get_Flash_Player.jpg" /></a>');
            }

            return;
        } else if (!WebUploader.Uploader.support()) {
            alert('Web Uploader 不支持您的浏览器！');
            return;
        }

        // 实例化
        uploader = WebUploader.create({
            pick: {
                id: '#filePicker',
                label: '点击选择图片'
            },
            formData: {
                uid: 123
            },
            dnd: '#uploader .queueList',
            paste: '#uploader',
            swf: '../../dist/Uploader.swf',
            chunked: false,
            chunkSize: 512 * 1024,
            server: '/pdm/draw/webuploader',
            // runtimeOrder: 'flash',

            // accept: {
            //     title: 'Images',
            //     extensions: 'gif,jpg,jpeg,bmp,png',
            //     mimeTypes: 'image/*'
            // },

            // 禁掉全局的拖拽功能。这样不会出现图片拖进页面的时候，把图片打开。
            disableGlobalDnd: true,
            fileNumLimit: 300,
            fileSizeLimit: 200 * 1024 * 1024,    // 200 M
            fileSingleSizeLimit: 50 * 1024 * 1024    // 50 M
        });

        // 拖拽时不接受 js, txt 文件。
        uploader.on('dndAccept', function (items) {
            var denied = false,
                len = items.length,
                i = 0,
                // 修改js类型
                unAllowed = 'text/plain;application/javascript ';

            for (; i < len; i++) {
                // 如果在列表里面
                if (~unAllowed.indexOf(items[i].type)) {
                    denied = true;
                    break;
                }
            }

            return !denied;
        });

        uploader.on('dialogOpen', function () {

        });

        // uploader.on('filesQueued', function() {
        //     uploader.sort(function( a, b ) {
        //         if ( a.name < b.name )
        //           return -1;
        //         if ( a.name > b.name )
        //           return 1;
        //         return 0;
        //     });
        // });

        // 添加“添加文件”的按钮，
        uploader.addButton({
            id: '#filePicker2',
            label: '继续添加'
        });

        uploader.on('ready', function () {
            window.uploader = uploader;
        });

        // 当有文件添加进来时执行，负责view的创建
        function addFile(file) {
            var $li = $('<li id="' + file.id + '">' +
                '<p class="title">' + file.name + '</p>' +
                '<p class="imgWrap"></p>' +
                '<p class="progress"><span></span></p>' +
                '</li>'),

                $btns = $('<div class="file-panel">' +
                    '<span class="cancel">删除</span>' +
                    '<span class="rotateRight">向右旋转</span>' +
                    '<span class="rotateLeft">向左旋转</span></div>').appendTo($li),
                $prgress = $li.find('p.progress span'),
                $wrap = $li.find('p.imgWrap'),
                $info = $('<p class="error"></p>'),

                showError = function (code) {
                    switch (code) {
                        case 'exceed_size':
                            text = '文件大小超出';
                            break;

                        case 'interrupt':
                            text = '上传暂停';
                            break;

                        default:
                            text = '上传失败，请重试';
                            break;
                    }

                    $info.text(text).appendTo($li);
                };

            if (file.getStatus() === 'invalid') {
                showError(file.statusText);
            } else {
                // @todo lazyload
                $wrap.text('预览中');

                uploader.makeThumb(file, function (error, src) {

                    var img;
                    if (error) {
                        $wrap.text('不能预览');
                        return;
                    }

                    if (isSupportBase64) {
                        img = $('<img src="' + src + '">');
                        $wrap.empty().append(img);
                    } else {
                        $.ajax('../../server/preview.php', {
                            method: 'POST',
                            data: src,
                            dataType: 'json'
                        }).done(function (response) {
                            if (response.result) {
                                img = $('<img src="' + response.result + '">');
                                $wrap.empty().append(img);
                            } else {
                                $wrap.text("预览出错");
                            }
                        });
                    }
                }, thumbnailWidth, thumbnailHeight);

                percentages[file.id] = [file.size, 0];
                file.rotation = 0;
            }

            file.on('statuschange', function (cur, prev) {
                if (prev === 'progress') {
                    $prgress.hide().width(0);
                } else if (prev === 'queued') {
                    $li.off('mouseenter mouseleave');
                    $btns.remove();
                }

                // 成功
                if (cur === 'error' || cur === 'invalid') {
                    showError(file.statusText);
                    percentages[file.id][1] = 1;
                } else if (cur === 'interrupt') {
                    showError('interrupt');
                } else if (cur === 'queued') {
                    $info.remove();
                    $prgress.css('display', 'block');
                    percentages[file.id][1] = 0;
                } else if (cur === 'progress') {
                    $info.remove();
                    $prgress.css('display', 'block');
                } else if (cur === 'complete') {
                    $prgress.hide().width(0);
                    $li.append('<span class="success"></span>');
                }

                $li.removeClass('state-' + prev).addClass('state-' + cur);
            });

            $li.on('mouseenter', function () {
                $btns.stop().animate({height: 30});
            });

            $li.on('mouseleave', function () {
                $btns.stop().animate({height: 0});
            });

            $btns.on('click', 'span', function () {
                var index = $(this).index(),
                    deg;

                switch (index) {
                    case 0:
                        uploader.removeFile(file);
                        return;

                    case 1:
                        file.rotation += 90;
                        break;

                    case 2:
                        file.rotation -= 90;
                        break;
                }

                if (supportTransition) {
                    deg = 'rotate(' + file.rotation + 'deg)';
                    $wrap.css({
                        '-webkit-transform': deg,
                        '-mos-transform': deg,
                        '-o-transform': deg,
                        'transform': deg
                    });
                } else {
                    $wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
                    // use jquery animate to rotation
                    // $({
                    //     rotation: rotation
                    // }).animate({
                    //     rotation: file.rotation
                    // }, {
                    //     easing: 'linear',
                    //     step: function( now ) {
                    //         now = now * Math.PI / 180;

                    //         var cos = Math.cos( now ),
                    //             sin = Math.sin( now );

                    //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
                    //     }
                    // });
                }


            });

            $li.appendTo($queue);
        }

        // 负责view的销毁
        function removeFile(file) {
            var $li = $('#' + file.id);

            delete percentages[file.id];
            updateTotalProgress();
            $li.off().find('.file-panel').off().end().remove();

            for (var i = 0; i < imageArr.length; i++) {
                if (imageArr[i] == '/files/' + file.name) {
                    imageArr.splice(i, 1);
                }
            }
            console.log(imageArr.join(','));
            $('#filepaths').val(imageArr.join(','));
        }

        function updateTotalProgress() {
            var loaded = 0,
                total = 0,
                spans = $progress.children(),
                percent;

            $.each(percentages, function (k, v) {
                total += v[0];
                loaded += v[0] * v[1];
            });

            percent = total ? loaded / total : 0;


            spans.eq(0).text(Math.round(percent * 100) + '%');
            spans.eq(1).css('width', Math.round(percent * 100) + '%');
            updateStatus();
        }

        function updateStatus() {
            var text = '', stats;

            if (state === 'ready') {
                text = '选中' + fileCount + '张图片，共' +
                    WebUploader.formatSize(fileSize) + '。';
            } else if (state === 'confirm') {
                stats = uploader.getStats();
                if (stats.uploadFailNum) {
                    text = '已成功上传' + stats.successNum + '张照片至XX相册，' +
                        stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
                }

            } else {
                stats = uploader.getStats();
                text = '共' + fileCount + '张（' +
                    WebUploader.formatSize(fileSize) +
                    '），已上传' + stats.successNum + '张';

                if (stats.uploadFailNum) {
                    text += '，失败' + stats.uploadFailNum + '张';
                }
            }

            $info.html(text);
        }

        function setState(val) {
            var file, stats;

            if (val === state) {
                return;
            }

            $upload.removeClass('state-' + state);
            $upload.addClass('state-' + val);
            state = val;

            switch (state) {
                case 'pedding':
                    $placeHolder.removeClass('element-invisible');
                    $queue.hide();
                    $statusBar.addClass('element-invisible');
                    uploader.refresh();
                    break;

                case 'ready':
                    $placeHolder.addClass('element-invisible');
                    $('#filePicker2').removeClass('element-invisible');
                    $queue.show();
                    $statusBar.removeClass('element-invisible');
                    uploader.refresh();
                    break;

                case 'uploading':
                    $('#filePicker2').addClass('element-invisible');
                    $progress.show();
                    $upload.text('暂停上传');
                    break;

                case 'paused':
                    $progress.show();
                    $upload.text('继续上传');
                    break;

                case 'confirm':
                    $progress.hide();
                    $('#filePicker2').removeClass('element-invisible');
                    $upload.text('开始上传');

                    stats = uploader.getStats();
                    if (stats.successNum && !stats.uploadFailNum) {
                        setState('finish');
                        return;
                    }
                    break;
                case 'finish':
                    $progress.hide();
                    stats = uploader.getStats();
                    if (stats.successNum) {
                        alert('上传成功');
                    } else {
                        // 没有成功的图片，重设
                        state = 'done';
                        location.reload();
                    }
                    break;
                case 'success':
                    stats = uploader;
                    break;
            }

            updateStatus();
        }

        uploader.onUploadProgress = function (file, percentage) {
            var $li = $('#' + file.id),
                $percent = $li.find('.progress span');

            $percent.css('width', percentage * 100 + '%');
            percentages[file.id][1] = percentage;
            updateTotalProgress();
        };

        uploader.onFileQueued = function (file) {
            fileCount++;
            fileSize += file.size;

            if (fileCount === 1) {
                $placeHolder.addClass('element-invisible');
                $statusBar.show();
            }

            addFile(file);
            setState('ready');
            updateTotalProgress();
        };

        uploader.onFileDequeued = function (file) {
            fileCount--;
            fileSize -= file.size;

            if (!fileCount) {
                setState('pedding');
            }

            removeFile(file);
            updateTotalProgress();

        };

        uploader.on('all', function (type) {
            var stats;
            switch (type) {
                case 'uploadFinished':
                    setState('confirm');
                    break;

                case 'startUpload':
                    setState('uploading');
                    break;

                case 'stopUpload':
                    setState('paused');
                    break;
                case 'uploadSuccess':
                    setState('success');
                    break;

            }
        });

        uploader.onError = function (code) {
            alert('Eroor: ' + code);
        };

        //单个文件上传成功回调
        uploader.onUploadSuccess = function (file, response) {
            //将文件名添加到全局数组imageArr中
            imageArr.push(response.data);
            //将数组转为字符串
            var pathStr = imageArr.join(',');

            console.log(pathStr);

            $('#filepaths').val(pathStr);
        };

        $upload.on('click', function () {
            if ($(this).hasClass('disabled')) {
                return false;
            }

            if (state === 'ready') {
                uploader.upload();
            } else if (state === 'paused') {
                uploader.upload();
            } else if (state === 'uploading') {
                uploader.stop();
            }
        });

        $info.on('click', '.retry', function () {
            uploader.retry();
        });

        $info.on('click', '.ignore', function () {
            alert('todo');
        });

        $upload.addClass('state-' + state);
        updateTotalProgress();


        var getFileBlob = function (url, cb) {
            var xhr = new XMLHttpRequest();
            xhr.open("GET", url);
            xhr.responseType = "blob";
            xhr.addEventListener('load', function () {
                cb(xhr.response);
            });
            xhr.send();
        };

        var blobToFile = function (blob, filePathOrUrl) {
            blob.lastModifiedDate = new Date();
            blob.name = filePathOrUrl.substring(filePathOrUrl.lastIndexOf("/") + 1, filePathOrUrl.length);
            blob.pic_url = filePathOrUrl;
            return blob;
        };

        var getFileObject = function (filePathOrUrl, cb) {
            if (filePathOrUrl) {
                getFileBlob(filePathOrUrl, function (blob) {
                    cb(blobToFile(blob, filePathOrUrl));
                });
            }
        };

        $.getJSON('/pdm/draw/getPaths', {draw_id: drawId}, function (res) {
            if (res.code == 0) {
                for (var i = 0; i < res.data.length; i++) {
                    var url = res.data[i].name;

                    //初始化图片数组
                    imageArr.push(url);
                    var pathStr = imageArr.join(',');
                    $('#filepaths').val(pathStr);

                    getFileObject(url, function (fileObject) {
                        var wuFile = new WebUploader.Lib.File(WebUploader.guid('rt_'), fileObject);
                        var file = new WebUploader.File(wuFile);
                        file.setStatus('complete');
                        uploader.addFile(file);
                        file.trigger('statuschange', 'complete');
                        updateStatus();
                    })
                }
            }
        });
    });

})(jQuery);

来源：oschina

链接：https://my.oschina.net/u/4388335/blog/3321853