JSON-formatted AJAX submission sample code _ajax related

Add: Com.springsource.org.apache.commons.logging-1.1.1.jar, Org.json.jar, and jquery-1.10.0.min.js packages

<form class= "Form-inline" > Sweep code: <input id= "Txtqrcode" type= "text" > <button id= "btnreceive" > OK </ 
button> </form> <script type= "Text/javascript" >//Scan two-dimensional code $ (' #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+ ') ');//concatenation of the JSON string 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 log 

GER = Logfactory.getlog (Asynchronouscontroller.class); /** * Scan Two-dimensional code to change the order to UTC audit * @param request * @param response * @throws IOException * @throws jsonexception * * @Request Mapping (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 ();//comprehensive information k = Keydao.findonebyorderid (OrderID); if (k!=null) {///Modify order status to audit 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"); 
Insert the record into the Flwo table 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 ("Scan two-dimensional code submission result: n=" +n+ "; flownum=" +flownum); 
if (n>0) {b = true; 
RETs = "Receive Order success in UTC"; 
Logger.info ("Receive order successfully in UTC"); 
else{RETs = "Failed to receive order in UTC"; 
Logger.info ("Failed to receive order in UTC"); 
} else{RETs = "Order query failed"; 
Logger.info ("Order query failed"); 
} else{RETs = "The order number in two-dimensional code is empty"; 
Logger.error ("The order number in two-dimensional code is empty"); 
} else{rets = "Two-dimensional code content is empty"; 
Logger.error ("Two-dimensional code content is empty"); 
} 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 (); } 
}