考慮瀏覽器兼容的文件上傳

2024-04-27 15:13:34

字體：大中小

來源：轉載

供稿：網友

方法一：使用FormData（因IE8不支持FormData, IE10才支持，因此此方法不兼容IE10以下的IE瀏覽器） 也可參考文章 http://www.jianshu.com/p/46e6e03a0d53

html:

js:

//新增行的保存及上傳文件function uploadFile(data) { var fileObj = document.getElementById("inputfile").files; // js 獲取文件對象 var FileController = "/action/add"; // 接收上傳文件的后臺地址 var form = new FormData(); //20160301 添加其他參數 form.append("param1",param1); form.append("param2",param2); if (fileObj.length != 0) { var i = fileObj.length; for (var j = 0; j < i; j++) { form.append("file" + j, fileObj[j]); // 文件對象 } } form.append("data", data); // xmlHttPRequest 對象 xmlhttpRequest = new XMLHttpRequest(); xmlHttpRequest.onreadystatechange = callback; xmlHttpRequest.open("post", FileController, true); /* event listeners */ // 進度條 // xmlHttpRequest.upload.addEventListener("progress", progressFunction, false); // xmlHttpRequest.addEventListener("load", uploadComplete, false); // xmlHttpRequest.addEventListener("error", uploadFailed, false); // xmlHttpRequest.addEventListener("abort", uploadCanceled, false); /* end listeners */ xmlHttpRequest.send(form);}function callback() { // 接收響應數據 // 判斷對象狀態是否交互完成，如果為4則交互完成 if (xmlHttpRequest.readyState == 4) { // 判斷對象狀態是否交互成功,如果成功則為200 if (xmlHttpRequest.status == 200) { // 接收數據,得到服務器輸出的純文本數據 var response = xmlHttpRequest.responseText; //console.log(response); if(response == 1) { enabledButton(); alert("保存成功!"); } else { alert("保存失敗，請重新嘗試!"); } enableButton(); }else{//!=200 alert("保存失敗!"); enableButton(); } }}

方法二：使用form提交兼容各種瀏覽器,form提交后會刷新頁面，且不太好獲取返回參數。如要返回原始頁面，需要用response.sendRedirect(原始頁面url)進行轉向。 html:

js:

//20160612 文件上傳按鈕 form表單提交function submitFile(){ var attach = document.getElementById("attach").value; alert("attach: " + attach); if(attach == undefined || attach == ""){ alert("請選擇文件"); return; } uploadFileForm.action = "/tools/uploadFileAction"; uploadFileForm.submit();}

方法三：使用jquery.form.js支持的Ajaxsubmit進行文件上傳 html:

js:

//在表單上追加input hidden元素存放其他參數function appendInputElementForForm(formId,inputName,inputValue){ var myh = document.createElement("input"); myh.type = "hidden"; myh.value = inputValue; myh.id = inputName; myh.name = inputName; document.getElementById(formId).appendChild(myh); alert(document.getElementById(inputName).value); }//20170207 文件上傳ajax Form表單提交function ajaxSubmitFile(){ var attach = document.getElementById("attach2").value; alert("ajaxSubmitFile attach2: " + attach); if(attach == undefined || attach == ""){ alert("請選擇文件"); return; } appendInputElementForForm( "uploadFileForm2", "param1", "123"); appendInputElementForForm( "uploadFileForm2", "param2", "測試參數"); $('#uploadFileForm2').ajaxSubmit({ type:"post", url:"/tools/ajaxUploadFileAction", data:$('#uploadFileForm2').serialize(), dataType:"json", error:function(data){ alert(data); }, success:function(data){ alert("ajaxSubmit上傳成功"); alert("下載地址： " + data.data.attachment); } }); }

最后附帶上后臺的java代碼：

//20160612 文件上傳@RequestMapping(value = "ajaxUploadFileAction")public ModelAndView ajaxUploadFile(HttpServletRequest request, HttpServletResponse response) throws Exception{ ResponseInfo responseInfo = new ResponseInfo(); logger.info("ajaxUploadFile param1: " + request.getParameter("param1")); logger.info("ajaxUploadFile param2: " + request.getParameter("param2")); try { //將當前上下文初始化給CommonsMutipartResolver （多部分解析器） CommonsMultipartResolver multipartResolver=new CommonsMultipartResolver( request.getsession().getServletContext()); // 判斷是否是多數據段提交格式 if (multipartResolver.isMultipart(request)) { MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request; logger.info("ajaxUploadFile param1: " + multiRequest.getParameter("param1")); logger.info("ajaxUploadFile param2: " + multiRequest.getParameter("param2")); Iterator<String> iter = multiRequest.getFileNames(); logger.info("iter.hasNext(): "+iter.hasNext()); Integer fileCount = 0; while (iter.hasNext()) { MultipartFile multipartFile = multiRequest.getFile(iter.next()); String fileName = multipartFile.getOriginalFilename(); logger.info("upload demand filename: " + fileName ); //20170207 針對IE環境下filename是整個文件路徑的情況而做以下處理 Integer index = fileName.lastIndexOf("http://"); String newStr = ""; if(index>-1){ newStr = fileName.substring(index+1); }else{ newStr = fileName; } if(!newStr.equals("")){ fileName = newStr; } logger.info("new filename: " + fileName ); if (multipartFile != null) { HashMap<String,Object> result = DispatchInterfaceUtil.uploadFileByInputStream (multipartFile.getInputStream(),multipartFile.getSize(),fileName); Integer statusCode = (Integer)result.get("statusCode"); logger.info("statusCode: " + statusCode); if( statusCode.equals(0) ){ String attachment = (String)result.get("attachment"); responseInfo. setStatus(true); responseInfo.put("attachment", attachment); }else{ String errorMessage = (String)result.get("errorMessage"); logger.error( "errorMessage: " + errorMessage); responseInfo.setStatus(false); responseInfo.setMsg("文件上傳失敗"); } } fileCount++; }//while logger.info("fileCount: " + fileCount); } }catch (Exception e) { // TODO: handle exception responseInfo.setStatus(false); responseInfo.setMsg("后臺出現異常"); logger.warn("Error: ", e); } response.setContentType("text/html; charset=utf-8"); response.getWriter().write( JSON.toJSONString(responseInfo)); return null; }

**注意： IE10可以支持application/json格式的Response了，也就是說低于IE10版本一下的IE瀏覽器都需要使用text/html格式的Response。在Response頭中指定Content-Type為text/html，是可以解決問題的。這樣返回給客戶端的是一個JSON字符串（并非JSON對象），無需IE來解析。**

上一篇：使用js計算N天前后的日期

下一篇：手機歸屬地免費接口查詢