③ 解决ie8文件上传问题

• ie8不支持FormData，且ie8获取不到 file属性（ie8浏览器的安全性能）

1 ajaxFileUpload() ====> 谷歌浏览器正常，ie8 不行

js文件

jQuery.extend({
    createUploadIframe: function(id, uri) {
        //create frame
        var frameId = 'jUploadFrame' + id;
        if(window.ActiveXObject) {  //修改以后的代码
            var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');  
            if(typeof uri== 'boolean'){  
                io.src = 'javascript:false';  
            }  else if(typeof uri== 'string'){  
                io.src = uri;  
            }     
      } //修改以后的代码
      else {
          var io = document.createElement('iframe');
          io.id = frameId;
          io.name = frameId;
      }
      io.style.position = 'absolute';
      io.style.top = '-1000px';
      io.style.left = '-1000px';
      document.body.appendChild(io);
      return io
  },
  createUploadForm: function(id, fileElementId) {
      //create form
      var formId = 'jUploadForm' + id;
      var fileId = 'jUploadFile' + id;
      var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
      var oldElement = $('#' + fileElementId);
      var newElement = $(oldElement).clone();
      $(oldElement).attr('id', fileId);
      $(oldElement).before(newElement);
      $(oldElement).appendTo(form);
      //set attributes
      $(form).css('position', 'absolute');
      $(form).css('top', '-1200px');
      $(form).css('left', '-1200px');
      $(form).appendTo('body');
      return form;
  },
  addOtherRequestsToForm: function(form,data) {
      // add extra parameter
      var originalElement = $('<input type="hidden" name="" value="">');
      for (var key in data) {
          name = key;
          value = data[key];
          var cloneElement = originalElement.clone();
          cloneElement.attr({'name':name,'value':value});
          $(cloneElement).appendTo(form);
      }
      return form;
  },
  handleError: function( s, xhr, status, e ) {
      // If a local callback was specified, fire it
      if ( s.error ) {
          s.error.call( s.context || s, xhr, status, e );
      }
      // Fire the global callback
      if ( s.global ) {
          (s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] );
      }
  },
  ajaxFileUpload: function(s) {
      // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
      s = jQuery.extend({}, jQuery.ajaxSettings, s);
      var id = new Date().getTime()
      var form = jQuery.createUploadForm(id, s.fileElementId);
      if ( s.data ) form = jQuery.addOtherRequestsToForm(form,s.data);
      var io = jQuery.createUploadIframe(id, s.secureuri);
      var frameId = 'jUploadFrame' + id;
      var formId = 'jUploadForm' + id;
      // Watch for a new set of requests
      if ( s.global && ! jQuery.active++ ) {
          jQuery.event.trigger( "ajaxStart" );
      }
      var requestDone = false;
      // Create the request object
      var xml = {}
      if ( s.global )   jQuery.event.trigger("ajaxSend", [xml, s]);
      // Wait for a response to come back
      var uploadCallback = function(isTimeout) {
          var io = document.getElementById(frameId);
          try {
              if(io.contentWindow {
                  xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
                  xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
              } else if(io.contentDocument) {
                  xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
                  xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
              }
          } catch(e) {
              jQuery.handleError(s, xml, null, e);
          }
          if ( xml || isTimeout == "timeout") {
              requestDone = true;
              var status;
              try {
                  status = isTimeout != "timeout" ? "success" : "error";
                  // Make sure that the request was successful or notmodified
                  if ( status != "error" ) {
                      // process the data (runs the xml through httpData regardless of callback)
                      var data = jQuery.uploadHttpData( xml, s.dataType );
                      // If a local callback was specified, fire it and pass it the data
                      if ( s.success )  s.success( data, status );
                      // Fire the global callback
                      if( s.global )  jQuery.event.trigger( "ajaxSuccess", [xml, s] );
                  } else
                      jQuery.handleError(s, xml, status);
              } catch(e) {
                  status = "error";
                  jQuery.handleError(s, xml, status, e);
              }

              // The request was completed
              if( s.global )
                  jQuery.event.trigger( "ajaxComplete", [xml, s] );
              // Handle the global AJAX counter
              if ( s.global && ! --jQuery.active )
                  jQuery.event.trigger( "ajaxStop" );
              // Process result
              if ( s.complete )
                  s.complete(xml, status);
              jQuery(io).unbind()
              setTimeout(function() {
  　　　 　　try {
                        $(io).remove();
                        $(form).remove();
                    } catch(e) {
                        jQuery.handleError(s, xml, null, e);
                    }
              }, 100)
              xml = null
          }
      }
      // Timeout checker
      if ( s.timeout > 0 ) {
          setTimeout(function() {
              // Check to see if the request is still happening
              if( !requestDone ) uploadCallback( "timeout" );
          }, s.timeout);
      }
      try {
          // var io = $('#' + frameId);
          var form = $('#' + formId);
          $(form).attr('action', s.url);
          $(form).attr('method', 'POST');
          $(form).attr('target', frameId);
          if(form.encoding) {
              form.encoding = 'multipart/form-data';
          } else {
              form.enctype = 'multipart/form-data';
          }
          $(form).submit();
      } catch(e) {
          jQuery.handleError(s, xml, null, e);
      }
      if(window.attachEvent){
          document.getElementById(frameId).attachEvent('onload', uploadCallback);
      } else{
          document.getElementById(frameId).addEventListener('load', uploadCallback, false);
      }
      return {abort: function () {}};
  },

  uploadHttpData: function( r, type ) {
      var data = !type;
      data = type == "xml" || data ? r.responseXML : r.responseText;
      // If the type is "script", eval it in global context
      if ( type == "script" )
          jQuery.globalEval( data );
      // Get the JavaScript object, if JSON is used.
      if ( type == "json" )
      {
          // If you add mimetype in your response,
          // you have to delete the '<pre></pre>' tag.
          // The pre tag in Chrome has attribute, so have to use regex to remove
          var data = r.responseText;
          var rx = new RegExp("<pre.*?>(.*?)</pre>","i");
          var am = rx.exec(data);
          //this is the desired data extracted
          var data = (am) ? am[1] : "";    //the only submatch or empty
          eval( "data = " + data );
      }
      // evaluate scripts within html
      if ( type == "html" )
          jQuery("<div>").html(data).evalScripts();
      //alert($('param', data).each(function(){alert($(this).attr('value'));}));
      return data;
  }
})

html

 <input type="file" accept=".zip,application/zip,application/x-zip-compressed" id="uploadButton" name="file" style="display: none;"/>

js

$.ajaxFileUpload({
    url: href + url,
    secureuri: false,
    fileElementId: 'uploadButton',
    dataType: 'json',
    data: { },
    type: 'POST',
    success: function(res){
//
    },
    fail: function (err) {
//
    }
})

2 ajaxSubmit

html

<button class="btn btn-primary" type="button" id="uploadPic">上传照片</button>
<form id="fileLoad" name="fileLoad" method="POST">
　　<input type="file" accept=".zip,application/zip,application/x-zip-compressed" id="uploadButton" name="file" style="display: none;"/>
　　<input type="text" name="operatorName" id="operatorName" style="display: none;">
　　<input type="text" name="operatorId" id="operatorId" style="display: none;">
</form>

js

$('#fileLoad').ajaxSubmit({
    type:"post",
    url: href + url,
　　data: {
　　　　operatorName: 'test334',
　　　　operatorId: '440939199809090029',
　　},
　　// data: $('#fileLoad').serialize(),
　　dataType:'json',
　　contentType: 'multipart/form-data',
　　error:function(err){
　　　　//
　　},
　　success:function(res){
　　　　//
　　}
})