bootstrap+fileinput插件实现可预览上传照片功能


实际项目中运用：



功能：实现上传图片，更改上传图片，移除图片的功能

<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <title></title>
        <link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css">
        <link rel="stylesheet" href="bootstrap-fileinput.css">
        <script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
        <script src="http://cdn.static.runoob.com/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="${companyInfo.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="#" 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 url = '';
$("#uploadImage").fileupload({
    url : ROOT + "/security/company/uploadFile",
    dataType : 'json',
    autoUpload : false,
    acceptFileTypes : /(gif|jpe?g|png)$/i,
    maxFileSize : 1000000, // 1 MB
    imageMaxWidth : 100,
    imageMaxHeight : 100,
    messages : {
        acceptFileTypes : '文件类型不匹配',
        maxFileSize : '文件过大',
        minFileSize : '文件过小'
    }
}).on("fileuploadadd", function(e, data) {
    // 当文件添加上去时候调用
    $("#titleImageError").html("");
    data.submit()
}).on("fileuploaddone", function(e, data) {
    // 上传完成时调用
    if (data.result.returnState == "ERROR") {
        alert("上传失败")
        return;
    }
    url = data.result.returnData.url;
});

function updateMsg() {
    $.ajax({
        url : ROOT + "/security/company/updateInfo",
        data : {
            id : $("#companyId").val(),
            image : url,
            companyName : $("#companyName").val(),
            companySite : $("#companySite").val(),
            companyLinker : $("#companyLinker").val(),
            companyTel : $("#companyTel").val()
        },
        type : "post",
        success : function(data) {
            if (data.returnState == "OK") {
                layer.msg('操作成功', {
                    icon : 6,
                    shade : 0.01,
                    offset : [ '57px', '1100px' ]
                });
                $table.bootstrapTable('refresh');
            } else {
                layer.msg('操作失败', {
                    icon : 5,
                    shade : 0.01,
                    offset : [ '90px', '900px' ]
                });
            }
        }
    });
}
    </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.com/jasny/bootstrap/blob/master/LICENSE)
 */
 
.btn-file {
  position: relative;
  overflow: hidden;
  vertical-align: middle;
}
.btn-file > input {
  position: absolute;
  top: 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-top: 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: #faebcc;
}
.form-group.has-error .fileinput .fileinput-preview {
  color: #a94442;
}
.form-group.has-error .fileinput .thumbnail {
  border-color: #ebccd1;
}
.form-group.has-success .fileinput .fileinput-preview {
  color: #3c763d;
}
.form-group.has-success .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.com/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 compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/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 Internet 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.stopPropagation()

    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 account
        if (preview.css('max-height') != 'none') $img.css('max-height', parseInt(preview.css('max-height'), 10) - parseInt(preview.css('padding-top'), 10) - parseInt(preview.css('padding-bottom'), 10)  - parseInt(preview.css('border-top'), 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);

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原文作者：祈澈姑娘
原文链接：https://www.jianshu.com/u/05f416aefbe1
创作不易，转载请告知

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posted @ 2018-05-03 11:18  祈澈姑娘  阅读(784)  评论(0)  编辑  收藏  举报