json格式的Ajax提交

需要加入：com.springsource.org.apache.commons.logging-1.1.1.jar、org.json.jar和jquery-1.10.0.min.js包<form class="form-inline">扫码: <input id="txtQRCode" type="text"><button id="btnReceive">确定</button></form><script type="text/javascript">//扫描二维码$('#btnReceive').click(function(){$.ajax({       type:"GET",       url:"<%=basePath%>asynchronous/receive.do",       data:{qrCode:$('#txtQRCode').val()},       dataType:"json",       cache:false,       success:function(msg){           //var json = eval('('+msg+')');//拼接的json串                              var flag = msg.flag;               var info = msg.info;               if(flag){               alert(info);               $('#txtQRCode').val("");               }               else{               alert(info);               }       },       error:function(error){alert(error);}   });});});</script>package com.utcsoft.pcapps.selfservice.controller;import java.io.IOException;import java.io.PrintWriter;import java.net.UnknownHostException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.json.JSONException;import org.json.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import com.utcsoft.common.attributes.YesNoEnum;import com.utcsoft.common.util.DateOperate;import com.utcsoft.pcapps.selfservice.attributes.KeyRequestAttr;import com.utcsoft.pcapps.selfservice.dao.FlowDao;import com.utcsoft.pcapps.selfservice.dao.KeyRequestDao;import com.utcsoft.pcapps.selfservice.entity.Flow;import com.utcsoft.pcapps.selfservice.entity.KeyRequest;import com.utcsoft.pcapps.selfservice.entity.UtcUsers;@Controller@RequestMapping(value = "/asynchronous")public class AsynchronousController {private final static Log logger = LogFactory.getLog(AsynchronousController.class);/** * 扫描二维码 将订单改为UTC审核 * @param request * @param response * @throws IOException * @throws JSONException */@RequestMapping(value="/receive")public void receive(HttpServletRequest request,HttpServletResponse response) throws IOException, JSONException{String rets = "";boolean b = false;try{String qrcode = request.getParameter("qrCode")==null?"":request.getParameter("qrCode").toString().trim();logger.info(qrcode);if(!"".equals(qrcode)){JSONObject obj = new JSONObject(qrcode);String orderid = obj.getString("orderid").trim();if(!"".equals(orderid)){KeyRequestDao keyDao = new KeyRequestDao();KeyRequest k = new KeyRequest();//综合信息k = keyDao.findOneByOrderId(orderid);if(k!=null){//修改订单状态为审核int n = keyDao.updateState(orderid, String.valueOf(KeyRequestAttr.KqStateEnum.verify.getStep()));Flow flow = new Flow();FlowDao flowDao = new FlowDao();UtcUsers users = (UtcUsers)request.getSession().getAttribute("utcUsers");//将记录插入Flwo表中flow.setKq_id(orderid);flow.setKq_state(String.valueOf(KeyRequestAttr.KqStateEnum.cus_send.getStep()));flow.setKq_state_to(String.valueOf(KeyRequestAttr.KqStateEnum.verify.getStep()));flow.setIs_Pass(YesNoEnum.Y.getCode());flow.setUser_id(users.getUser_id());flow.setUser_id_from(users.getUser_id());flow.setOpTimer(DateOperate.getDateTime());int flowNum = flowDao.save(flow);logger.info("扫描二维码提交结果：n="+n+";flowNum="+flowNum);if(n>0){b = true;rets = "UTC接收订单成功";logger.info("UTC接收订单成功");}else{rets = "UTC接收订单失败";logger.info("UTC接收订单失败");}}else{rets = "订单查询失败";logger.info("订单查询失败");}}else{rets = "二维码中订单号为空";logger.error("二维码中订单号为空");}}else{rets = "二维码内容为空";logger.error("二维码内容为空");}}catch(Exception e){e.printStackTrace();rets = e.getMessage();logger.error(e.getMessage());}JSONObject ret = new JSONObject();ret.put("flag", b);ret.put("info", rets);PrintWriter write = response.getWriter();write.write(ret.toString());write.flush();}}