jquery.form.js没有任何反应?报错_问答-阿里云开发者社区

今天闲着尝试了一下jQuery.form.js插件来进行异步的提交表单上传文件

jsp：

         <form method="post"style="padding-left: 50px;padding-top: 25px"id="form2"enctype="multipart/form-data"> 
       
                             选择Excel文件：<input type="file"name="files"id="files"/></p> 
       
                             <input type="button"value="上传"id="bt"/> 
       
                         </form>

点击上传按钮的js事件代码：

         <script src="JS/jquery-1.8.0.js"type="text/javascript"></script> 
       
         <script src="JS/jquery.form.js"type="text/javascript"></script> 
       
         <script type="text/javascript"> 
       
                         $(function(){ 
       
                             $("#bt").click(function(){ 
       
                                 varoptions={ 
       
                                         url:"uploadServlet",    
       
                                         type:"post", 
       
                                         dataType:null,  
       
                                         success:function(mes){ 
       
                                             alert(mes); 
       
                                         } 
       
                                     }; 
       
                                     $("#form2").submit(function() { 
       
                                          $(this).ajaxSubmit(options); 
       
                                          returnfalse; 
       
                                      }); 
       
                             }); 
       
                         }); 
       
         </script>

就是一个简单地上传文件的操作，上传的地址是一个servlet

在servlet中我使用cos上传方式

我在servlet中out.print出OK

servlet：

         publicvoiddoGet(HttpServletRequest request, HttpServletResponse response) 
       
                     throwsServletException, IOException { 
       
                 request.setCharacterEncoding("UTF-8"); 
       
                 response.setContentType("text/html;charset=utf-8"); 
       
                 PrintWriter out=response.getWriter(); 
       
                 String str=""; 
       
                 try{ 
       
                     String ExcelFile=this.getServletContext().getRealPath("ExcelFile")+"\\"; 
       
                     newMultipartRequest(request, ExcelFile,10*1024*1024,"utf-8",newDefaultFileRenamePolicy()) ; 
       
                     str="OK"; 
       
                 }catch(Exception e) { 
       
                     e.printStackTrace(); 
       
                     str="NO"; 
       
                 } 
       
                 out.print(str); 
       
                 out.flush(); 
       
                 out.close(); 
       
             }