Java中利用MultipartFile实现文件上传

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JavaWeb项目页面实现文件上传功能

jsp文件增加文件上传控件，可以放在form表单内，增加隐藏域保存上传路径提交到后台。

<div class="form-group"><div class="col-sm-7 center ">        <input class="btn btn-xs btn-primary" type="button"  id="uploadBtn" value="选择上传文件">   <input type="file" class="hidden"  name="file" id="fileupload" onchange="">    <input id="apkUrl" name="apkUrl" value="">    <label id="fileName"></label>    <div class="hidden" id="uploadimg">    <img alt="uploading..." src="${ctx}/static/images/upload.gif">正在上传，请稍后...</div>        </div>

js方法：

$("#fileupload").fileupload({   acceptFileTypes: /(\.|\/)(apk)$/i,   url:'${ctx}/layout/apk/uploadFile',    dataType: 'json',    add:function(e,data){    var fileName = data.files[0].name;    var exurl=fileName.substring(fileName.lastIndexOf('.')+1,fileName.length);if(exurl!= 'apk'){$('#fileName').text("不是apk文件，请重新上传！");}else{         data.context=$('#fileName').text("");       $('#uploadimg').removeClass('hidden');       data.submit();}     },    success: function (data) {    $("#apkUrl").val(url + data.msg);$('#uploadimg').addClass('hidden');$("#fileName").html("上传成功");},  });

Java后台controller方法：

@RequestMapping(value = "/uploadFile" , method = RequestMethod.POST)  public void uploadApk(HttpServletRequest request, HttpServletResponse response,@RequestParam(value = "file") MultipartFile file,  Model model){

  String path = request.getSession().getServletContext().getRealPath("upload");        String fileName = file.getOriginalFilename();        File targetFile = new File(path, fileName);          if(!targetFile.exists()){              targetFile.mkdirs();          }             try {            file.transferTo(targetFile);            if(path != null && !path.equals("")){            String newPath = path.replaceAll("\\\\", "/");                JsonResult data = new JsonResult();                data.setMsg(newPath);    Renders.renderJson(response,data);        }else{        Renders.renderJson(response, Renders.SAVE_FAILURE);        }          } catch (Exception e) {              e.printStackTrace();            Renders.renderJson(response, Renders.SAVE_FAILURE);        }    }

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