form表单数据封装成json格式并提交给服务器的实现方法

<form action="#" id="costForm"><input type="hidden" id="userId" name="userId"/><div id="COST"> <img src='<%=path %>/cvc/center/images/close.png' class="close" style="width:34px;position:absolute;right:0px;top:0px;"></img> <h2 style="font-weight: bolder;font-size: 14px;">更改该注册订单的收费状态</h2> <ul> <li>  <label for="report">   　是否已报到：  </label>  <input type="radio" id="baodao1" name="baodao" value="1"/>是  <input type="radio" id="baodao0" name="baodao" value="0"/>否 </li> <li>  <label for="name">   　　姓　　名：  </label>  <span id="costName"></span> </li> <li>  <label for="type">   　　注册类型：  </label>  <span id="costType"></span> </li> <li>  <label for="sure_fee">   　在线支付手续费：  </label>  <span id="costType">0</span> </li> <li>  <label for="sure_fee">   　 应收费金额：  </label>  <span id="price"></span> </li> <li>  <label for="already_fee">   　 已收费金额：  </label>  <input type="text" id="pay_" name="pay"/> </li> <li>  <label for="owe">   　　欠　　款：  </label>  <span id="qianPay"></span> </li> <li>  <label for="fee_type">   　　付款方式：  </label>  <input type="radio" id="payType1" name="payType" value="3"/>银行  <input type="radio" id="payType2" name="payType" value="4"/>邮局  <input type="radio" id="payType3" name="payType" value="5"/>现金  <input type="radio" id="payType4" name="payType" value="2"/>在线支付 </li> <li>  <label for="fee_evidence">     是否收到汇款凭证：  </label>  <input type="radio" id="isReceiveProof1" name="isReceiveProof" value="1"/>是  <input type="radio" id="isReceiveProof0" name="isReceiveProof" value="0"/>否 </li> <li>  <label for="fa_piao">   　　发票抬头：  </label>  <span id="billTitle"></span> </li>   <li>  <label for="fa_piao">   　　发票编号：  </label>   <input type="text" id="billCode" name="billCode"/> </li> <li>  <label for="check_evidence">   是否已开发票：  </label>  <input type="radio" id="isBill1" name="isBill" value="1"/>是  <input type="radio" id="isBill0" name="isBill" value="0"/>否 </li> <li>  <label for="get_evidence">   是否已领发票：  </label>  <input type="radio" id="isDrawBill1" name="isDrawBill" value="1"/>是  <input type="radio" id="isDrawBill0" name="isDrawBill" value="0"/>否 </li> <li>   <label for="date">   已发确认日期：  </label>  <span id="confirmDate"></span>  <!-- <input type="text" id="confirmDate" name="confirmDate"/> -->   <!-- <input id="confirmDate" name="confirmDate" class="text" type="text" onClick="WdatePicker()"/> --> </li> <li>  <label for="check_letter">是否已发确认函：</label>  <span id="isConfirmInvitation"></span> </li>  <li>  <label for="fa_piao">在线支付状态：</label>  <span id="payString"></span> </li> </ul> <div class="fee_opr">  <button type="button" class="fee_sure" style="border: none;background: #003260;color: #ffffff;padding: 3px 30px;margin-left: 10px;border-radius: 0px;">确定</button>  <button type="button" class="fee_cancel" style="border: none;background: #003260;color: #ffffff;padding: 3px 30px;margin-left: 10px;border-radius: 0px;">关闭</button> </div></div></form>

$(".fee_sure").click(function () {  var dataObj = $("#costForm").serialize();  var payType = $('input[name="payType"]:checked').val();  if(payType == undefined){   alert("请选择付款类型");   return ;  }else{   $.ajax({    url:"/webCenter.do?method=saveUserMessage",    type: "post",     dataType:"json",    data:dataObj,    cache:false,    ifModified:true,    success:function(json){      if(json.flag == 1){       alert("1234");      }    }   })  } })

@RequestMapping(params ="method=saveUserMessage",method=RequestMethod.POST)  //导入发言     public void saveUserMessage(int userId,HttpServletRequest request,HttpServletResponse response){      try {       HttpSession session = this.getSession(request);       Adminuser adminUser = session.getAttribute("centerAdminUser") == null?null:(Adminuser) session.getAttribute("centerAdminUser");       if(adminUser == null){        try {         response.sendRedirect(request.getContextPath()+"/center/index.jsp");        } catch (Exception e) {         e.printStackTrace();        }       }else{        String billNumber = request.getParameter("billCode")==null?"":request.getParameter("billCode");        String isBaodao = request.getParameter("baodao")==null?"0":request.getParameter("baodao");        String haspay = request.getParameter("pay")==null?"0":request.getParameter("pay");        String payType = request.getParameter("payType")==null?"0":request.getParameter("payType");        String isFkpz = request.getParameter("isReceiveProof")==null?"0":request.getParameter("isReceiveProof");        String isYkfp = request.getParameter("isBill")==null?"0":request.getParameter("isBill");        String isYlfp = request.getParameter("isDrawBill")==null?"0":request.getParameter("isDrawBill");        JSONObject jsonObject = new JSONObject();        //AdminuserConferences adminuserConferences = webService.getAdminuserConferences(adminUser.getAdminuserId());        UserInfo userInfo = webService.getUserInfoById(userId);        if(userInfo!=null)        {         jsonObject.accumulate("flag",1);         ChcRegUser chcRegUser = webService.getChcRegUser(userId);         if(chcRegUser!=null)         {          chcRegUser.setHasPay(Integer.parseInt(haspay));          chcRegUser.setPayType(Integer.parseInt(payType));          if(chcRegUser.getHasPay()-chcRegUser.getPay()==0)          {           chcRegUser.setStateType(1);          }          webService.saveObject(chcRegUser);          userInfo.setIsBaodao(Integer.parseInt(isBaodao));          userInfo.setIsFkpz(Integer.parseInt(isFkpz));          userInfo.setBillNumber(billNumber);          userInfo.setIsYlfp(Integer.parseInt(isYlfp));          userInfo.setIsYkfp(Integer.parseInt(isYkfp));          webService.saveObject(userInfo);          jsonObject.accumulate("pay", chcRegUser.getPay());          jsonObject.accumulate("haspay", chcRegUser.getHasPay());         }        }else {         jsonObject.accumulate("flag",0);        }        writeJson(response, jsonObject.toString());       }      } catch (Exception e) {       e.printStackTrace();      }     }