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本篇文章为大家展示了怎么在Java中利用dropzone.js实现一个文件拖拽上传功能,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
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jsp页面:
1. 首先必须引入dropzone的js和css文件
2.自己定义两个div区域
<%--拖拽文件上传 --%>uopload
这是我的文件上传之后的文件队列区域:
3.对dropzone.css进行修改,将文件内的所有dropzone替换为dropz
修改文件拖拽区域的显示样式:
.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*/ }
4.在jsp对div进行dropzone参数的自定义
java后台处理文件上传的代码:
@RequestMapping(params = "saveFile", method = RequestMethod.POST) public void saveFile(HttpServletRequest request, HttpServletResponse response, TSDocument document) throws Exception{ Mapattributes = new HashMap (); 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(); }
注意这里的返回值是直接返回的json对象,如果采用
@RequestMapping(params = "saveFiles", method = RequestMethod.POST) @ResponseBody
则会报错:
复制代码 代码如下:
[com.framework.core.common.exception.MyExceptionHandler]org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
上述内容就是怎么在Java中利用dropzone.js实现一个文件拖拽上传功能,你们学到知识或技能了吗?如果还想学到更多技能或者丰富自己的知识储备,欢迎关注创新互联行业资讯频道。