bootstrap fileinput插件实现预览上传照片功能
网络编程 2021-07-04 17:33www.168986.cn编程入门
这篇文章主要介绍了bootstrap fileinput插件实现预览上传照片功能,代码简单易懂，非常不错，具有参考借鉴价值，需要的朋友可以参考下
效果图如下所示
具体代码如下
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="http://cdn.static.runoob./libs/bootstrap/3.3.7/css/bootstrap.min.css" rel="external nofollow" >
<link rel="stylesheet" href="bootstrap-fileinput.css" rel="external nofollow" >
<script src="http://cdn.static.runoob./libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.static.runoob./libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="bootstrap-fileinput.js"></script>
</head>
<body>
<div class="form-group">
<div class="col-md-8">
<div class="fileinput fileinput-new" data-provides="fileinput" id="uploadImageDiv">
<div class="fileinput-new thumbnail" style="width: 200px; height: 150px;">
<img src="${panyInfo.image}" alt="" />
</div>
<div class="fileinput-preview fileinput-exists thumbnail" style="max-width: 200px; max-height: 150px;"></div>
<div>
<span class="btn default btn-file"> <span
class="fileinput-new">选择图片</span> <span class="fileinput-exists">更改</span> <input type="file" name="uploadImage" id="uploadImage" /></span>
<a href="#" rel="external nofollow" class="btn default fileinput-exists" data-dismiss="fileinput">移除</a>
<span>请选择1M以内图片</span>
</div>
</div>
<div id="titleImageError" style="color: #a94442"></div>
</div>
</div>
</body>
<script>
var handleEvent = function() {
$("#uploadImage").fileupload({
url: "design/resource/uploadFile",
dataType: 'json',
autoUpload: false,
aeptFileTypes: /(gif|jpe?g|png)$/i,
maxFileSize: 1000000, // 1 MB
imageMaxWidth: 100,
imageMaxHeight: 100,
messages: {
aeptFileTypes: '文件类型不匹配',
maxFileSize: '文件过大',
minFileSize: '文件过小'
}
}).on("fileuploadadd", function(e, data) {
$("#titleImageError").html("");
$("#addBtn,#updateBtn").off("click").on("click", function() {
if($("#dialogForm").validate().form()) {
customGlobal.blockUI("#modalContent");
data.submit()
}
})
}).on("fileuploadprocessalways", function(e, data) {
var index = data.index,
file = data.files[index];
if(file.error) {
$("#titleImageError").html(file.error)
}
$("#addBtn,#updateBtn").prop('disabled', !!data.files.error);
}).on("fileuploaddone", function(e, data) {
if(data.result.returnState == "ERROR") {
toastr.warning(data.result.returnMsg);
customGlobal.ajaxCallback(data);
return;
}
addNews(data.result.returnData.url);
});
}
</script>
</html>
bootstrap-fileinput.css文件（github目前正在维护中，之后所有代码上传至我的github）
/!
Jasny Bootstrap v3.1.3 (http://jasny.github.io/bootstrap)
Copyright 2012-2014 Arnold Daniels
Licensed under Apache-2.0 (https://github./jasny/bootstrap/blob/master/LICENSE)
/
.btn-file {
position: relative;
overflow: hidden;
vertical-align: middle;
}
.btn-file > input {
position: absolute;
: 0;
right: 0;
width: 100%;
height: 100%;
margin: 0;
font-size: 23px;
cursor: pointer;
filter: alpha(opacity=0);
opacity: 0;
direction: ltr;
}
.fileinput {
display: inline-block;
margin-bottom: 9px;
}
.fileinput .form-control {
display: inline-block;
padding-: 7px;
padding-bottom: 5px;
margin-bottom: 0;
vertical-align: middle;
cursor: text;
}
.fileinput .thumbnail {
display: inline-block;
margin-bottom: 5px;
overflow: hidden;
text-align: center;
vertical-align: middle;
}
.fileinput .thumbnail > img {
max-height: 100%;
}
.fileinput .btn {
vertical-align: middle;
}
.fileinput-exists .fileinput-new,
.fileinput-new .fileinput-exists {
display: none;
}
.fileinput-inline .fileinput-controls {
display: inline;
}
.fileinput-filename {
display: inline-block;
overflow: hidden;
vertical-align: middle;
}
.form-control .fileinput-filename {
vertical-align: bottom;
}
.fileinput.input-group {
display: table;
}
.fileinput.input-group > {
position: relative;
z-index: 2;
}
.fileinput.input-group > .btn-file {
z-index: 1;
}
.fileinput-new.input-group .btn-file,
.fileinput-new .input-group .btn-file {
border-radius: 0 4px 4px 0;
}
.fileinput-new.input-group .btn-file.btn-xs,
.fileinput-new .input-group .btn-file.btn-xs,
.fileinput-new.input-group .btn-file.btn-sm,
.fileinput-new .input-group .btn-file.btn-sm {
border-radius: 0 3px 3px 0;
}
.fileinput-new.input-group .btn-file.btn-lg,
.fileinput-new .input-group .btn-file.btn-lg {
border-radius: 0 6px 6px 0;
}
.form-group.has-warning .fileinput .fileinput-preview {
color: #8a6d3b;
}
.form-group.has-warning .fileinput .thumbnail {
border-color: #faeb;
}
.form-group.has-error .fileinput .fileinput-preview {
color: #a94442;
}
.form-group.has-error .fileinput .thumbnail {
border-color: #ebd1;
}
.form-group.has-suess .fileinput .fileinput-preview {
color: #3c763d;
}
.form-group.has-suess .fileinput .thumbnail {
border-color: #d6e9c6;
}
.input-group-addon:not(:first-child) {
border-left: 0;
}
bootstrap-fileinput.js:
/ ===========================================================
Bootstrap: fileinput.js v3.1.3
http://jasny.github./bootstrap/javascript/#fileinput
===========================================================
Copyright 2012-2014 Arnold Daniels
Licensed under the Apache License, Version 2.0 (the "License")
you may not use this file except in pliance with the License.
You may obtain a copy of the License at
http://.apache./licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
========================================================== /
+function ($) { "use strict";
var isIE = window.navigator.appName == 'Microsoft Inter Explorer'
// FILEUPLOAD PUBLIC CLASS DEFINITION
// =================================
var Fileinput = function (element, options) {
this.$element = $(element)
this.$input = this.$element.find(':file')
if (this.$input.length === 0) return
this.name = this.$input.attr('name') || options.name
this.$hidden = this.$element.find('input[type=hidden][name="' + this.name + '"]')
if (this.$hidden.length === 0) {
this.$hidden = $('<input type="hidden">').insertBefore(this.$input)
}
this.$preview = this.$element.find('.fileinput-preview')
var height = this.$preview.css('height')
if (this.$preview.css('display') !== 'inline' && height !== '0px' && height !== 'none') {
this.$preview.css('line-height', height)
}
this.original = {
exists: this.$element.hasClass('fileinput-exists'),
preview: this.$preview.html(),
hiddenVal: this.$hidden.val()
}
this.listen()
}
Fileinput.prototype.listen = function() {
this.$input.on('change.bs.fileinput', $.proxy(this.change, this))
$(this.$input[0].form).on('reset.bs.fileinput', $.proxy(this.reset, this))
this.$element.find('[data-trigger="fileinput"]').on('click.bs.fileinput', $.proxy(this.trigger, this))
this.$element.find('[data-dismiss="fileinput"]').on('click.bs.fileinput', $.proxy(this.clear, this))
},
Fileinput.prototype.change = function(e) {
var files = e.target.files === undefined ? (e.target && e.target.value ? [{ name: e.target.value.replace(/^.+\\/, '')}] : []) : e.target.files
e.sPropagation()
if (files.length === 0) {
this.clear()
return
}
this.$hidden.val('')
this.$hidden.attr('name', '')
this.$input.attr('name', this.name)
var file = files[0]
if (this.$preview.length > 0 && (typeof file.type !== "undefined" ? file.type.match(/^image\/(gif|png|jpeg)$/) : file.name.match(/\.(gif|png|jpe?g)$/i)) && typeof FileReader !== "undefined") {
var reader = new FileReader()
var preview = this.$preview
var element = this.$element
reader.onload = function(re) {
var $img = $('<img>')
$img[0].src = re.target.result
files[0].result = re.target.result
element.find('.fileinput-filename').text(file.name)
// if parent has max-height, using `(max-)height: 100%` on child doesn't take padding and border into aount
if (preview.css('max-height') != 'none') $img.css('max-height', parseInt(preview.css('max-height'), 10) - parseInt(preview.css('padding-'), 10) - parseInt(preview.css('padding-bottom'), 10) - parseInt(preview.css('border-'), 10) - parseInt(preview.css('border-bottom'), 10))
preview.html($img)
element.addClass('fileinput-exists').removeClass('fileinput-new')
element.trigger('change.bs.fileinput', files)
}
reader.readAsDataURL(file)
} else {
this.$element.find('.fileinput-filename').text(file.name)
this.$preview.text(file.name)
this.$element.addClass('fileinput-exists').removeClass('fileinput-new')
this.$element.trigger('change.bs.fileinput')
}
},
Fileinput.prototype.clear = function(e) {
if (e) e.preventDefault()
this.$hidden.val('')
this.$hidden.attr('name', this.name)
this.$input.attr('name', '')
//ie8+ doesn't support changing the value of input with type=file so clone instead
if (isIE) {
var inputClone = this.$input.clone(true);
this.$input.after(inputClone);
this.$input.remove();
this.$input = inputClone;
} else {
this.$input.val('')
}
this.$preview.html('')
this.$element.find('.fileinput-filename').text('')
this.$element.addClass('fileinput-new').removeClass('fileinput-exists')
if (e !== undefined) {
this.$input.trigger('change')
this.$element.trigger('clear.bs.fileinput')
}
},
Fileinput.prototype.reset = function() {
this.clear()
this.$hidden.val(this.original.hiddenVal)
this.$preview.html(this.original.preview)
this.$element.find('.fileinput-filename').text('')
if (this.original.exists) this.$element.addClass('fileinput-exists').removeClass('fileinput-new')
else this.$element.addClass('fileinput-new').removeClass('fileinput-exists')
this.$element.trigger('reset.bs.fileinput')
},
Fileinput.prototype.trigger = function(e) {
this.$input.trigger('click')
e.preventDefault()
}
// FILEUPLOAD PLUGIN DEFINITION
// ===========================
var old = $.fn.fileinput
$.fn.fileinput = function (options) {
return this.each(function () {
var $this = $(this),
data = $this.data('bs.fileinput')
if (!data) $this.data('bs.fileinput', (data = new Fileinput(this, options)))
if (typeof options == 'string') data[options]()
})
}
$.fn.fileinput.Constructor = Fileinput
// FILEINPUT NO CONFLICT
// ====================
$.fn.fileinput.noConflict = function () {
$.fn.fileinput = old
return this
}
// FILEUPLOAD DATA-API
// ==================
$(document).on('click.fileinput.data-api', '[data-provides="fileinput"]', function (e) {
var $this = $(this)
if ($this.data('bs.fileinput')) return
$this.fileinput($this.data())
var $target = $(e.target).closest('[data-dismiss="fileinput"],[data-trigger="fileinput"]');
if ($target.length > 0) {
e.preventDefault()
$target.trigger('click.bs.fileinput')
}
})
}(window.jQuery);
以上所述是长沙网络推广给大家介绍的bootstrap fileinput插件实现预览上传照片功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，长沙网络推广会及时回复大家的。在此也非常感谢大家对狼蚁SEO网站的支持！
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