form表单数据封装成json格式并提交给服务器

1、jsp代码，form表单：

<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="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");
                        }
                }
            })
        }
    })

3、后台action处理：

    @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();
                        }
                    }