form表单中带有文件上传，同时提交

前台JS（easyUI）

function EditsubmitForm() { 
    var father = $('#select_category').combobox('getValue');
    $('#knowledgeAddForm').form('submit', { 
       url: "${path }/knowledgeAdd/addPageKnowledgeAdd?fatherId="+father, 
       onSubmit: function () {        //表单提交前的回调函数 
              var isValid = $(this).form('validate');//验证表单中的一些控件的值是否填写正确，比如某些文本框中的内容必须是数字 
              return isValid; // 如果验证不通过，返回false终止表单提交 
       }, 
       success: function () {  //表单提交成功后的回调函数，里面参数data是我们调用/BasicClass/ModifyClassInfo方法的返回值。 
               parent.$.messager.alert("添加成功","知识库添加成功!",'info');
               location.reload();
            } 
          });       
    }

前台表单

   

      

            
内容
            

                  
            
        
         

              
上传
              

                     
              
         
   
       
 
            确定 
            
      

后台controller层

@RequestMapping(value = "/knowledgeAddPage", method = RequestMethod.GET)
        public String addPage() {
            return "/knowledge/knowledgeAdd";
        }
        @RequestMapping(value = "/addPageKnowledgeAdd")
        public String addKnowledge(@RequestParam(value = "file") MultipartFile file,Knowledge knowledge,Long fatherId,HttpServletRequest req) throws IOException {
            String domain = req.getSession().getAttribute("domain").toString();
            String userName = req.getSession().getAttribute("username").toString();
            String fileName = file.getOriginalFilename();
            if(fileName==""){
                knowledge.setDomain(domain);//域名
                knowledge.setUserName(userName);//当前用户名
                knowledge.setFatherId(fatherId);//关联ID
                knowledgeAddService.addKnowledge(knowledge);
            }else{
                String suffix = fileName.substring(fileName.lastIndexOf(".") + 0);
                Date d2 = new Date();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
                String dateNumber = sdf.format(d2);
                String attachment = "D://"+dateNumber+suffix;
                File desc = MakeFileUtil.makefile(attachment);
                knowledge.setDomain(domain);
                knowledge.setUserName(userName);
                knowledge.setFileName(fileName);//文件名
                
                knowledge.setAttachment(attachment);//文件路径
                knowledge.setFatherId(fatherId);
                knowledgeAddService.addKnowledge(knowledge);
                
                file.transferTo(desc);//上传
                
            }
            return "/knowledge/knowledgeAdd";
        }