本文介绍如何使用 WebUploader 库实现图片上传功能。详细步骤包括下载 WebUploader、引入资源文件、初始化插件及样式、编写 HTML 结构，并提供服务端代码示例。
1.首先下载webuploder地址如下：
地址：http://fex.baidu.com/webuploader/download.html
2.然后在引用资源文件
- <link href="${XXX}/bootstrap-3.3.5-dist/css/bootstrap.min.css" type="text/css" rel="stylesheet"/>
- <link href="${XXX}/webupload/css/webuploader.css" type="text/css" rel="stylesheet"/>
- <script type="text/javascript" src="${XXX}/jquery/jquery-1.9.1.min.js"></script>
- <script type="text/javascript" src="${XXX}/webupload/webuploader.min.js"></script>
- <script type="text/javascript" src="${XXX}/bootstrap-3.3.5-dist/js/bootstrap.min.js"></script>
#container {
color: #838383;
font-size: 12px;
}
#uploader .queueList {
margin: 20px 0;
border: 3px dashed #e6e6e6;
}
#uploader .queueList.filled {
padding: 17px;
margin: 0;
border: 3px dashed transparent;
}
#uploader .queueList.webuploader-dnd-over {
border: 3px dashed #999999;
}
#uploader p {margin: 0;}
.element-invisible {
position: absolute !important;
clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
clip: rect(1px,1px,1px,1px);
}
#uploader .placeholder {
min-height: 90px;
padding-top: 60px;
text-align: center;
background: url(../images/image.png) center 93px no-repeat;
color: #cccccc;
font-size: 18px;
position: relative;
}
#uploader .placeholder .webuploader-pick {
font-size: 18px;
background: #00b7ee;
border-radius: 3px;
line-height: 44px;
padding: 0 30px;
*width: 120px;
color: #fff;
display: inline-block;
margin: 0 auto 20px auto;
cursor: pointer;
box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}
#uploader .placeholder .webuploader-pick-hover {
background: #00a2d4;
}
#uploader .placeholder .flashTip {
color: #666666;
font-size: 12px;
position: absolute;
width: 100%;
text-align: center;
bottom: 20px;
}
#uploader .placeholder .flashTip a {
color: #0785d1;
text-decoration: none;
}
#uploader .placeholder .flashTip a:hover {
text-decoration: underline;
}
#uploader .filelist {
list-style: none;
margin: 0;
padding: 0;
}
#uploader .filelist:after {
content: '';
display: block;
width: 0;
height: 0;
overflow: hidden;
clear: both;
}
#uploader .filelist li {
width: 110px;
height: 110px;
background: url(../images/bg.png) no-repeat;
text-align: center;
margin: 0 8px 20px 0;
position: relative;
display: inline;
float: left;
overflow: hidden;
font-size: 12px;
}
#uploader .filelist li p.log {
position: relative;
top: -45px;
}
#uploader .filelist li p.title {
position: absolute;
top: 0;
left: 0;
width: 100%;
overflow: hidden;
white-space: nowrap;
text-overflow : ellipsis;
top: 5px;
text-indent: 5px;jQuery(function() {
var $ = jQuery, // just in case. Make sure it's not an other libaray.
$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'),
// 总体进度条
$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 = {},
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() ) {
alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
throw new Error( 'WebUploader does not support the browser you are using.' );
}
// 实例化
uploader = WebUploader.create({
pick: {
id: '#filePicker',
label: '点击选择图片'
},
dnd: '#uploader .queueList',
paste: document.body,
accept: {
title: 'Images',
extensions: 'gif,jpg,jpeg,bmp,png',
mimeTypes: 'image/*'
},
// swf文件路径
// swf: BASE_URL + '/js/Uploader.swf',
disableGlobalDnd: true,
chunked: true,
// server: 'http://webuploader.duapp.com/server/fileupload.php',
server: '/EstateBusiness/admin/news/imgUpload',
fileNumLimit: 300,
fileSizeLimit: 5 * 1024 * 1024, // 200 M
fileSingleSizeLimit: 1 * 1024 * 1024 // 50 M
});
// 添加“添加文件”的按钮，
uploader.addButton({
id: '#filePicker2',
label: '继续添加'
});
// 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 ) {
if ( error ) {
$wrap.text( '不能预览' );
return;
}
var img = $('<img src="'+src+'">');
$wrap.empty().append( img );
}, thumbnailWidth, thumbnailHeight );
percentages[ file.id ] = [ file.size, 0 ];
file.rotation = 0;
}
file.on('uploadProgress', function( file, percentage ) {
debugger;
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 );
}
// 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() {
debugger;
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.parent().removeClass('filled');
$queue.hide();
$statusBar.addClass( 'element-invisible' );
uploader.refresh();
break;
case 'ready':
$placeHolder.addClass( 'element-invisible' );
$( '#filePicker2' ).removeClass( 'element-invisible');
$queue.parent().addClass('filled');
$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();
$upload.text( '开始上传' ).addClass( 'disabled' );
stats = uploader.getStats();
if ( stats.successNum && !stats.uploadFailNum ) {
setState( 'finish' );
return;
}
break;
case 'finish':
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;
}
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 ) {
debugger;
var stats;
switch( type ) {
case 'uploadFinished':
setState( 'confirm' );
break;
case 'startUpload':
setState( 'uploading' );
break;
case 'stopUpload':
setState( 'paused' );
break;
}
});
uploader.onError = function( code ) {
alert( 'Eroor: ' + code );
};
$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();
});
text-align: left;}#uploader .filelist li p.progress { position: absolute; width: 100%; bottom: 0; left: 0; height: 8px; overflow: hidden; z-index: 50; margin: 0; border-radius: 0; background: none; -webkit-box-shadow: 0 0 0;}#uploader .filelist li p.progress span { display: none; overflow: hidden; width: 0; height: 100%; background: #1483d8 url(../images/progress.png) repeat-x; -webit-transition: width 200ms linear; -moz-transition: width 200ms linear; -o-transition: width 200ms linear; -ms-transition: width 200ms linear; transition: width 200ms linear; -webkit-animation: progressmove 2s linear infinite; -moz-animation: progressmove 2s linear infinite; -o-animation: progressmove 2s linear infinite; -ms-animation: progressmove 2s linear infinite; animation: progressmove 2s linear infinite; -webkit-transform: translateZ(0);}@-webkit-keyframes progressmove { 0% { background-position: 0 0; } 100% { background-position: 17px 0; }}@-moz-keyframes progressmove { 0% { background-position: 0 0; } 100% { background-position: 17px 0; }}@keyframes progressmove { 0% { background-position: 0 0; } 100% { background-position: 17px 0; }}#uploader .filelist li p.imgWrap { position: relative; z-index: 2; line-height: 110px; vertical-align: middle; overflow: hidden; width: 110px; height: 110px; -webkit-transform-origin: 50% 50%; -moz-transform-origin: 50% 50%; -o-transform-origin: 50% 50%; -ms-transform-origin: 50% 50%; transform-origin: 50% 50%; -webit-transition: 200ms ease-out; -moz-transition: 200ms ease-out; -o-transition: 200ms ease-out; -ms-transition: 200ms ease-out; transition: 200ms ease-out;}#uploader .filelist li img { width: 100%;}#uploader .filelist li p.error { background: #f43838; color: #fff; position: absolute; bottom: 0; left: 0; height: 28px; line-height: 28px; width: 100%; z-index: 100;}#uploader .filelist li .success { display: block; position: absolute; left: 0; bottom: 0; height: 40px; width: 100%; z-index: 200; background: url(../images/success.png) no-repeat right bottom;}#uploader .filelist div.file-panel { position: absolute; height: 0; filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#80000000', endColorstr='#80000000')\0; background: rgba( 0, 0, 0, 0.5 ); width: 100%; top: 0; left: 0; overflow: hidden; z-index: 300;}#uploader .filelist div.file-panel span { width: 24px; height: 24px; display: inline; float: right; text-indent: -9999px; overflow: hidden; background: url(../images/icons.png) no-repeat; margin: 5px 1px 1px; cursor: pointer;}#uploader .filelist div.file-panel span.rotateLeft { background-position: 0 -24px;}#uploader .filelist div.file-panel span.rotateLeft:hover { background-position: 0 0;}#uploader .filelist div.file-panel span.rotateRight { background-position: -24px -24px;}#uploader .filelist div.file-panel span.rotateRight:hover { background-position: -24px 0;}#uploader .filelist div.file-panel span.cancel { background-position: -48px -24px;}#uploader .filelist div.file-panel span.cancel:hover { background-position: -48px 0;}#uploader .statusBar { height: 63px; border-top: 1px solid #dadada; padding: 0 20px; line-height: 63px; vertical-align: middle; position: relative;}#uploader .statusBar .progress { border: 1px solid #1483d8; width: 198px; background: #fff; height: 18px; position: relative; display: inline-block; text-align: center; line-height: 20px; color: #6dbfff; position: relative; margin: 20px 200px 0 0;}#uploader .statusBar .progress span.percentage { width: 0; height: 100%; left: 0; top: 0; background: #1483d8; position: absolute;}#uploader .statusBar .progress span.text { position: relative; z-index: 10;}#uploader .statusBar .info {line-height:30px;margin: 2px 200px; display: inline-block; font-size: 14px; color: #666666;}#uploader .statusBar .btns { position: absolute; top: 10px; right: 20px; line-height: 40px;}#filePicker2 { display: inline-block; float: left;}#uploader .statusBar .btns .webuploader-pick,#uploader .statusBar .btns .uploadBtn,#uploader .statusBar .btns .uploadBtn.state-uploading,#uploader .statusBar .btns .uploadBtn.state-paused { background: #ffffff; border: 1px solid #cfcfcf; color: #565656; padding: 0 18px; display: inline-block; border-radius: 3px; margin-left: 10px; cursor: pointer; font-size: 14px; float: left;}#uploader .statusBar .btns .webuploader-pick-hover,#uploader .statusBar .btns .uploadBtn:hover,#uploader .statusBar .btns .uploadBtn.state-uploading:hover,#uploader .statusBar .btns .uploadBtn.state-paused:hover { background: #f0f0f0;}#uploader .statusBar .btns .uploadBtn { background: #00b7ee; color: #fff; border-color: transparent;}#uploader .statusBar .btns .uploadBtn:hover { background: #00a2d4;}#uploader .statusBar .btns .uploadBtn.disabled { pointer-events: none; opacity: 0.6;}
3.html代码
<input id="xgcl" name="xgcl" type='hidden' value="${cqCqrxx.xgcl}"/>
<div id="uploader" class="wu-example">
<div class="queueList">
<div id="dndArea" class="placeholder">
<div id="filePicker"></div>
</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>4.服务端代码，这里服务端用的springmvc框架，（其实服务端就是正常的文件上传的代码就可以了）
public static String fileUpload(HttpServletRequest request,String folderName){
int counter = 0;
String fileNameALL = "";
String fileName = "";
System.out.println("收到文件!");
MultipartHttpServletRequest Murequest = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> files = Murequest.getFileMap();// 得到文件map对象
String upaloadUrl = request.getSession().getServletContext().getRealPath("/") + folderName+"/";// 得到当前工程路径拼接上文件名
File dir = new File(upaloadUrl);
System.out.println(upaloadUrl);
if (!dir.exists())// 目录不存在则创建
dir.mkdirs();
for (MultipartFile file : files.values()) {
counter++;
fileName = file.getOriginalFilename();
File tagetFile = new File(upaloadUrl + fileName);// 创建文件对象
if (counter == 1) {
fileNameALL = fileName;
} else {
fileNameALL = fileNameALL + "," + fileName;
}
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");
System.out.println(fileNameALL);
return fileNameALL;
// return response;
}
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