Java实现拖拽文件上传dropzone.js的简单使用示例代码

<link rel="stylesheet" href="dropzone/css/dropzone.css" rel="external nofollow" > <script src="dropzone/js/dropzone.js"></script> 

<%--拖拽文件上传 --%>             <div id="div1" class="dropz" style="width:0px; height:0px;">              uopload             </div>             <div id="div2" class="dropz" style=" background: white;border:none;float:left;">                           </div> 

<div id="fileslist" style="padding: 10px;"></div> 

.dropz {/*设置拖拽上传文件按钮的格式*/   min-height:0px;   min-width: 100px;   border: 1px solid #58AF0C;   background: white;   padding: 15px 20px;   background-color: #7AC143;   background-image: -webkit-gradient(linear, left bottom, left top, color-stop(0, #7AC143),     color-stop(1, #7AC143));   background-position: center top;   background-repeat: no-repeat;   border-radius: 5px;   min-height:0px;   min-width: 100px;   padding: 15px 20px;      color: #FFF;   font: bold 12px Arial, Helvetica, sans-serif;   text-align: center;   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);  }  .dropz.dz-clickable {   cursor: pointer;   line-height: 0px;/*按钮中的文字垂直居中*/    } 

<script type="text/javascript">   $("#div1").dropzone({   url:"systemController.action?saveFile",//上传文件的地址，   maxFiles:1,//最多上传几个文件   maxFilesize: 5,//文件的大小，单位是M   addRemoveLinks:true,//是否有删除文件的功能   dictRemoveFile:"",//删除文件   previewsContainer:"#div2",//文件上传进度显示的区域   acceptedFiles: ".jpg,.jpeg,.png,.gif,.xls,.txt,.sql,.rar,.mkv",//支持的格式   paramName:'file',//上传的FILE名称，即服务端可以通过此来获取上传的文件，如$_FILES['dropimage']   init: function() {//初始化时的事件     //$("#uploadfile").uploadFile({success:function(data){      this.on("addedfile", function(file) {        // Create the remove button       var removeButton = Dropzone.createElement("<img src='plug-in/uploadify/img/uploadify-cancel.png' title='删除'/>");        // Capture the Dropzone instance as closure.       var _this = this;        // Listen to the click event       removeButton.addEventListener("click", function(e) {        // Make sure the button click doesn't submit the form:        e.preventDefault();        e.stopPropagation();        alert("Are you sure to delete?");        // Remove the file preview.        _this.removeFile(file);        // If you want to the delete the file on the server as well,        // you can do the AJAX request here.       });       // Add the button to the file preview element.       file.previewElement.appendChild(removeButton);       });       this.on("success", function(file, data) {          if (this.getUploadingFiles().length === 0 && this.getQueuedFiles().length === 0) {           var d = $.parseJSON(data);           var fileitem = "<span class='uploadFile-queue-item' id='" + d.fileKey + "'><a>" + d.name           + "</a><img border='0' style='padding:2px;cursor:pointer;' onclick=delAttachment('" + d.delurl + "','"           + d.fileKey + "','" + d.name           + "') title='删除' src='plug-in/uploadify/img/uploadify-cancel.png' widht='15' height='15'> </span>";          $("#fileslist").html(fileitem);          $("#attachment").val(d.fileKey + "," + d.name + ";");         }          this.removeFile(file);       });     } }); </script> 

@RequestMapping(params = "saveFile", method = RequestMethod.POST)   public void saveFile(HttpServletRequest request, HttpServletResponse response, TSDocument document) throws Exception{     Map<String, Object> attributes = new HashMap<String, Object>();     TSTypegroup tsTypegroup=systemService.getTypeGroup("fieltype","文档分类");     TSType tsType = systemService.getType("files","附件", tsTypegroup);     String fileKey = oConvertUtils.getString(request.getParameter("fileKey"));// 文件ID     String documentTitle = oConvertUtils.getString(request.getParameter("documentTitle"),"uploadfile");// 文件标题     if (StringUtil.isNotEmpty(fileKey)) {       document.setId(fileKey);       document = systemService.getEntity(TSDocument.class, fileKey);       document.setDocumentTitle(documentTitle);      }     document.setBusinessKey(request.getParameter("businessKey"));     document.setSubclassname(MyClassLoader.getPackPath(document));     document.setCreatedate(DateUtils.gettimestamp());     document.setTSType(tsType);     UploadFile uploadFile = new UploadFile(request, document);     uploadFile.setCusPath("files");     uploadFile.setSwfpath("swfpath");     document = systemService.uploadFile(uploadFile);     attributes.put("url", document.getRealpath());     attributes.put("fileKey", document.getId());     if (ResourceUtil.getSessionUserName()!=null) {       attributes.put("uploadUser", ResourceUtil.getSessionUserName().getUserName());     }else{       attributes.put("uploadUser", "null");     }     attributes.put("time", new SimpleDateFormat("yyyy-MM-dd").format(new Date()));     attributes.put("name", document.getAttachmenttitle()+"."+document.getExtend());     attributes.put("downloadurl", "commonController.action?viewFile&fileid="+ document.getId()+"&subclassname=");     attributes.put("viewhref", "commonController.action?objfileList&fileKey=" + document.getId());     attributes.put("delurl", "commonController.action?delObjFile&fileKey=" + document.getId());     attributes.put("realPath", document.getRealpath());     if(FileUtils.isPicture(document.getExtend())){       attributes.put("imgUrl", document.getRealpath());     }     JSONObject js = new JSONObject(attributes);     response.getWriter().write(js.toString());     response.getWriter().flush();   } 

@RequestMapping(params = "saveFiles", method = RequestMethod.POST)   @ResponseBody