表单提交时上传图片 表单ajax提交

页面

<script type="text/javascript" src="js/jquery.form.js"></script>
<script language="javascript">
$(function() {

　　//提交表单
        $("#add").click(function() {
            if($('#addForm').form('validate')){
               var options = {
                    url: '${currentBaseUrl}/doAdd',
                    type: 'post',
                    success: function (data) {
                        if("ok"==data.message)
                            window.location.href=data.backUrl;
                        else{
                            $.messager.alert('提示', data.message);
                            $("#imageFile").val("").focus()
                        }
                    }    
                };
                $('#addForm').ajaxSubmit(options);
            }         
        });
})
</script>

<form method="post" class="validForm" id="addForm" name="addForm" enctype="multipart/form-data">
    <input type="file" id="imageFile" name="imageFile"  class="txt w240 easyui-validatebox"  />
    <input type="button" id="add" class="btn" value="提交" />
</form>

---

Controller类

@RequestMapping(value = "doAdd", method = { RequestMethod.POST })
@ResponseBody
 public HttpJsonResult<Object> doAdd(MultipartHttpServletRequest request, HttpServletResponse response, FbNews news){
        HttpJsonResult<Object> jsonResult = new HttpJsonResult<Object>();
        try {
            MultipartFile multipartFile = request.getFile("imageFile");
            if (null != multipartFile && multipartFile.getSize() > 0) {
                //扩展名
                String extend = multipartFile.getOriginalFilename().substring(multipartFile.getOriginalFilename().lastIndexOf(".") + 1).toLowerCase();
                if (!isImg(extend)) {
                    jsonResult.setMessage("请上传图片!");
                    return jsonResult;
                }
                
                File tmpFile = new File(buildImgPath(request) + "/"+ multipartFile.getOriginalFilename());
                if (!multipartFile.isEmpty()) {
                    byte[] bytes = multipartFile.getBytes();
                    BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(tmpFile));
                    stream.write(bytes);
                    stream.close();
                }
            }
            /**其他代码省略**/
            
            jsonResult.setMessage("ok");

　　　//添加成功 返回列表页面
            jsonResult.setBackUrl(DomainUrlUtil.getJM_URL_RESOURCES() + "/admin/fbfc/news");
            return jsonResult;
        } catch (Exception e) {
            throw new RuntimeException();
        }
        
    }

  //是否是图片

  private boolean isImg(String extend) {
        List<String> list = new ArrayList<String>();
        list.add("jpg");
        list.add("jpeg");
        list.add("bmp");
        list.add("gif");
        list.add("png");
        list.add("tif");
        return list.contains(extend);
    }

//图片上传的路径

private String buildImgPath(HttpServletRequest request) {
        String path = "upload";
        SimpleDateFormat formater = new SimpleDateFormat("yyyyMMdd");
        path += "/" + formater.format(new Date());
        path = request.getRealPath(path);
        File dir = new File(path);
        if (!dir.exists()) {
            try {
                dir.mkdirs();
            } catch (Exception e) {
                log.error("error", e);
            }
        }
        return path;
    }