Summary of combined use of JSON jquery Servlet

JSON is used in the project over the past few days.

Jquery's front-end using JSON with Servlet is basically divided into two modes:

1. Basic Key-value pairs

This is the most common method. jquery Ajax is used in almost every way.

For example:

// Cascade database bit code $ ("# lgort"). Load ("lgort. do? Method = getlgortbybukrs ", {" bukrs ": bukrs });

Corresponding servlet:

String bukrs = request.getParameter("bukrs");

 

$.post("mard.do?method=getMard4Out",{matnr:matnr,lgort:lgort,lfimg:lfimg,curDeliveryNr:curDeliveryNr},function(data){   var html ='';   $.each(data, function(k,v){ html += '<tr>' ;html +=  '<td> <span id="lgort">' + v.lgort+'</span></td>';html +=  '<td> <input type="text" name="lagpcode" id="lagpcode" readonly value="'+v.lagpcode+ '"'+  ' class="input_noteidt3" /></td>';html +=  '<td><span id="mantnr">' + v.matnr+'</span></td>';html +=  '<td> <input type="text" name="batchCode" id="batchCode" readonly value="'+v.batchcode+ '"'+ ' class="input_noteidt3" /></td>';html +=  '<td> <input type="text" name="menge" id="menge" readonly value="'+v.labst+ '"' + ' class="input_noteidt3" /></td>';html +=  '<td> <input type="text" name="meins" id="meins" readonly value="'+v.meins+ '"'     + ' class="input_noteidt3" /></td>';html +=  '<td><span id="budate">' + v.budate+'</span></td>';html +=  '<td>'+'<input type="radio" name="radio" id="radio" value="'+v.mardid+'"/> </td>';html += '</tr>' ;   });$("#messageTab").append(html);},"json");  

Corresponding background code:

// Obtain the passed item number and location string matnr = request. getparameter ("matnr"); string lgort = request. getparameter ("lgort"); string lfimg = request. getparameter ("lfimg ");

Method 2: pass an array:

This method can be divided into two situations:

(1) an array of value types, such as [1] and ['2 ']

// Save row Project Quantity split $ ("# saveselect "). click (function () {If (uncompletecount> 0) {alert ('new rows have not been saved. Please save them first !! '); Return} if ($ ("# messagetab TR: GT (0)"). Length <1) {alert (' no project can be entered! '); Return ;} // create an array to save the Mardid corresponding to the current outgoing delivery order number line project // The First Action current outgoing delivery order number | line item number var mards = new array (); mards. push (curdeliverynr); $ ("# messagetab TR: GT (0 )"). each (function (index, element) {var Mardid = trim ($ (this ). find (": Radio "). val (); mards. push (Mardid) ;}); $. post ("Mard. do? Method = getdatabyjson ", {mards: mards}, function () {}); // close the layer $ (" # mybg "). hide (); $ ("# message_box "). hide (); // Save the number of shards to itemcount + = (mards. length-1); alert ('number of projects in the row has been split! ');});

 

The background code is as follows:

// Here is mards [], not mards

String [] mards = request. getparametervalues ("mards []"); If (mards! = NULL & mards. length> 0) {// The first element is the outgoing delivery order number + line project number string key = mards [0]; List <string> IDs = new arraylist <string> (); for (INT I = 1; I <mards. length; I ++) {IDs. add (mards [I]); // system. out. println (mards [I]);} If (outmardmap = NULL) {outmardmap = new hashmap <string, list <string> ();} // forcibly overwrite the old pairing relationship outmardmap. put (Key, IDS);} else {Throw new exception ("failed to get the Mardid corresponding to the row project! ");}

(2) object array return

Foreground $ ("# messagetab TR: GT (0 )"). each (function (index, element) {var tritem = new object (); var vbeln = $ (this ). find ("# vbeln "). val () var ebelp = $ (this ). find ("# ebelp "). val () var barcode = $ (this ). find ("# barcode "). val (); var matnr = $ (this ). find ("# matnr "). val (); var batchcode = $ (this ). find ("# batchcode "). val (); var menge = $ (this ). find ("# menge "). val (); var Meins = $ (this ). find ("# Meins "). val (); lagpcodevar lagpco De = $ (this ). find ("# lagpcode "). val (); // specify the lgort value for the form on the pop-up layer bukrsformvar lgort = trim ($ ("# lgort" ).html ()); vaR bukrs = trim ($ ("# bukrs" ).html (); tritem. lgort = lgort; tritem. bukrs = bukrs; tritem. vbeln = vbeln; tritem. ebelp = ebelp; tritem. barcode = barcode; tritem. matnr = matnr; tritem. batchcode = batchcode; tritem. menge = menge; tritem. meins = Meins; tritem. lagpcode = lagpcode; tbdata. push (tritem) ;}); // alert (tbdata. leng Th); // alert (tbdata [0] ['barcode']); var jsondata = JSON. stringify (tbdata); alert (jsondata); $. post ('tr. do? Method = save2pocache ', {jsondata: jsondata}, function () {}, 'json ');

Background:

String jsondata = request. getparameter ("jsondata");/** because the foreground is in the form of [{}, {}], it is received using jsonarray. If it is {'users ':[{}, {}]} Then use jsonobject to receive */jsonarray ja = jsonarray. fromobject (jsondata); For (Object O: Ja) {jsonobject Jo = (jsonobject) O; If (ebelp = "") {ebelp = Jo. getstring ("ebelp");} If (vbeln = "") {vbeln = Jo. getstring ("vbeln");} tritem item = new tritem (); item. settriid (UUID. generatepk (); // do not set trhiditem. settrhid (""); item. setbarcode (Jo. getstring ("barcode"); item. setmatnr (Jo. getstring ("matnr"); item. setbukrs (Jo. getstring ("bukrs"); item. setlgort (Jo. getstring ("lgort"); item. setlagpcode (Jo. getstring ("lagpcode"); item. settypeid ("lgtype001"); item. setbatchcode (Jo. getstring ("batchcode"); item. setmenge (Jo. getstring ("menge"); item. setmeins (Jo. getstring ("Meins"); item. setshkzg (""); item. setdelflag (""); item. settranstate (""); item. setcurlineno (ebelp); trems. add (item );}

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