利用WebUploader进行图片批量上传，在页面显示后选择多张图片压缩至指定路径【java】

　　WebUploader是由Baidu WebFE(FEX)团队开发的一个简单的以HTML5为主，FLASH为辅的现代文件上传组件。在现代的浏览器里面能充分发挥HTML5的优势，同时又不摒弃主流IE浏览器，沿用原来的FLASH运行时，兼容IE6+，iOS 6+, android 4+。两套运行时，同样的调用方式，可供用户任意选用。
　　jsp代码

　　

 <div class="upload_buttoncontainer">
 <button class="upload_accredit"
 onclick="showuploadimagesPage('upload','fade')">//onclik是打开一个窗口
 <label>批量上传</label>
 </button>
 </div>

　　js代码

　　

 (function( $ ){
     // 当domReady的时候开始初始化
     $(function() {
         var $wrap = $('#uploader'),

             // 图片容器
             $queue = $( '<ul id="filelist" 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: '点击选择文件'
             },
             formData: {
                 uid: 123
             },
             compress: false,//不启用压缩
             resize: false,//尺寸不改变
             dnd: '#dndArea',
             paste: '#uploader',
             swf: '../js/Uploader.swf',
             server: ‘后台’,
             method:'POST',

             // 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: 2000 * 1024 * 1024,    // 200 M
             fileSingleSizeLimit: 500 * 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('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'
         });
         // 添加“添加下一个”模型的按钮，
         /*uploader.addButton({
             id: '#addModel',
             label: '添加下一个'
         });*/
         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 + '"><div class="item">' +
                     '<p class="title">' + file.name + '</p>' +
                     '<p class="imgWrap"></p>'+
                     '<p class="progress"><span></span></p>' +
                     '</div></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.find('.item') ),
                 $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 );
                     }
                 }, 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' ) {
                     percentages[ file.id ][ 1 ] = 0;
                 } else if ( cur === 'progress' ) {
                     $info.remove();
                     $prgress.css('display', 'block');
                 } else if ( cur === 'complete' ) {
                     $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 );
             $('.filelist').sortable();
         }

         // 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+ '文件，'+
                         stats.uploadFailNum + '文件上传失败，<a class="retry" href="#">重新上传</a>失败或<a class="ignore" href="#">忽略</a>'
                 }

             } else {
                 stats = uploader.getStats();
                 text = '共' + fileCount + '个（' +
                         WebUploader.formatSize( fileSize )  +
                         '），已上传' + (stats.successNum+1) + '个';

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

             $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' );
                     $upload.text( '开始上传' );
                     /*$('#filePicker2 + .uploadBtn').click(function () {
                         window.location.reload();
                     });*/
                     stats = uploader.getStats();
                     if ( stats.successNum && !stats.uploadFailNum ) {
                         setState( 'finish' );
                         return;
                     }
                     break;
                 case 'finish':
                     stats = uploader.getStats();
                     if ( stats.successNum ) {
                         document.getElementById("shareUrl").style.visibility = 'visible';
                         createQrcode();
                     } else {
                         // 没有成功的图片，重设
                         state = 'done';
                         location.reload();
                     }
                     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;

             }
         });

         uploader.onError = function( code ) {
             alert( '图片重复' );
         };

         $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 );

　　后台代码

MultipartFile 需要在配置文件中进行配置上传的文件的大小，在这里我就不贴出来了

 public void uploadInformation(HttpServletRequest request,
             HttpServletResponse response) {
         System.out.println("收到图片!");
         MultipartHttpServletRequest Murequest = (MultipartHttpServletRequest) request;
         Map<String, MultipartFile> files = Murequest.getFileMap();// 得到文件map对象
         String upaloadUrl = new File(this.getClass().getClassLoader().getResource("/").getPath()).getParentFile().getParentFile()
                 .getAbsolutePath()
                 + "/upload/";// 得到当前工程路径拼接上文件名
         File dir = new File(upaloadUrl);
         if (!dir.exists())// 目录不存在则创建
             dir.mkdirs();
         int counter = 0;
         for (MultipartFile file : files.values()) {
             counter++;
             String fileName = file.getOriginalFilename();
             File tagetFile = new File(upaloadUrl + fileName);// 创建文件对象
             if (!tagetFile.exists()) {// 文件名不存在 则新建文件，并将文件复制到新建文件中
                 try {
                     tagetFile.createNewFile();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
                 try {
                     file.transferTo(tagetFile);
                 } catch (IllegalStateException e) {
                     e.printStackTrace();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }

         }
         System.out.println("接收完毕");
     }

　　这样图片批量上传的功能就实现了，当然也可以批量上传文件，只不过需要一些变动，有兴趣的可以去http://fex.baidu.com/webuploader/ 研究一下。接下来就是选择多张图片进行压缩并保存到指定路径下，关于图片在页面的显示 在这里就略过了。接下来是关于压缩文件的action代码

 public void yasuoIamges(HttpServletRequest request,
             HttpServletResponse response) throws Exception {
         String selids = request.getParameter("selTids");//选中图片的ID组成的字符串
         String date_format = "yyyy-MM-dd_HH_mm_ss";
         SimpleDateFormat f = new
                 SimpleDateFormat(date_format);
         List<File> filelist = new ArrayList<>();
         String[] uid = selids.split(",");
         for (int i = 0; i < uid.length; i++) {
             Images du = imagesService.getoneimage(Long
                     .valueOf(uid[i]));
             filelist.add(new File(new File(this.getClass().getClassLoader()
                     .getResource("/").getPath()).getParentFile()
                     .getParentFile().getAbsolutePath()
                     + "/" + du.getDupath()));
         }
         String icpath = new File(this.getClass().getClassLoader()
                 .getResource("/").getPath()).getParentFile().getParentFile()
                 .getAbsolutePath()
                 + "/compress/";
         File dir = new File(icpath);
         if (!dir.exists())// 目录不存在则创建
             dir.mkdirs();
         String filename = (f.format(new Date())) + ".rar";// 压缩包格式可以改
         FileOutputStream fos = new FileOutputStream(icpath + filename);
         ZipOutputStream zos = null;
         try {
             zos = new ZipOutputStream(fos);
             for (File srcFile : filelist) {
                 byte[] buf = new byte[BUFFER_SIZE];
                 zos.putNextEntry(new ZipEntry(srcFile.getName()));
                 int len;
                 FileInputStream in = new FileInputStream(srcFile);
                 while ((len = in.read(buf)) != -1) {
                     zos.write(buf, 0, len);
                 }
                 zos.closeEntry();
                 in.close();
             }
         } catch (Exception e) {
             throw new RuntimeException("zip error from ZipUtils", e);
         } finally {
             if (zos != null) {
                 try {
                     zos.close();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }

     }

　　第一次写博客很多东西不是很会说，请谅解，也希望大家能有所收获。