Five ajax interaction methods between Spring MVC frontend and backend

Five ajax interaction methods between Spring MVC frontend and backend

Frontend ajax and backend Spring MVC controllers have the following five Data Interaction methods. (DhtmlxGrid is used at the front end and fastjson is used at the backend)

Method 1: PASS Parameters through URL

Mount parameters through URL, such as/auth/getUser? Userid = '6'

The server method can be written as getUser (String userid). Other parameters such as HttpSession, HttpServletRequest, HttpServletResponse, Mode, and ModelAndView can also be added.

Method 2 single-value parameter passing

Frontend calls include:

AjaxPost ("/base/user/exchangeSort", {"id": rid, "otherid": otherid },Function(Data, status ){

Xxxxxx

Xxxxxx

});

The server side is:

Public String exchangeSort (String id, String otherid)

Method 3: Passing parameters from an object

Frontend calls include:

Var org = {id: id };

AjaxPost ("/base/org/getOrgById", org, function (data, textStatus ){

Xxxx

Xxxx

});

The server side is:

Public Org getOrgById (Org org)

Method 4 Object serialization parameter passing

Frontend calls include:

Var ueser = {id: rowId };

Var data = ajaxPost ("/base/user/findById", {"userObj": JSON. stringify (user)}, null );

Or

Var ueser ={}; // create an object

User ["id"] = id;

User ["name"] = $ ("# name"). val ();

User ["dept"] ={}; // Foreign key object

User ["dept"] ["id"] = $ ("# deptid"). val ();

AjaxPost ("/base/user/addUser", {"userObj": JSON. stringify (user)}, function (data) {xxxx; xxxxx ;});

The server side is:

@ RequestMapping ("/findById ")

@ ResponseBody

PublicUserInfo findById (String userObj ){

// Use fastJSON

UserInfo user = JSON. parseObject (userObj, UserInfo.Class);

User = (UserInfo) userService. findById (UserInfo.Class, User. getId ());

ReturnUser;

}

Method 5: Passing parameters in the list

The front-end code is as follows:

VarObjList =NewArray ();

Grid. forEachRow (Function(RId ){

VarIndex = grid. getRowIndex (rId );

VarObj = {};

Obj ["id"] = rId;

Obj ["user"] = {};

Obj ["user"] ["id"] = $ ("# userId"). val ();

// This method is not recommended

// Obj ["kinShip"] = grid. cells (rId, 1). getValue ();

// Obj ["name"] = grid. cells (rId, 2). getValue ();

Obj ["kinShip"] = grid. cells (rId, grid. getColIndexById ("columnName"). getValue ();

Obj ["name"] = grid. cells (rId, grid. getColIndexById ("name"). getValue ();

If(Grid. cells (rId, 3). getValue ()! =Null& Grid. cells (rId, 3). getValue ()! = ""){

VarStr = grid. cells (rId, 3). getValue (). split ("-");

VarDay = parseFloat (str [2]);

VarMonth = parseFloat (str [1])-1;

VarYear = parseInt (str [0]);

VarDate =NewDate ();

Date. setFullYear (year, month, day );

Obj ["birth"] = date;

}Else{

Obj ["birth"] = "";

}

Obj ["politicalStatus"] = grid. cells (rId, 4). getValue ();

Obj ["workUnit"] = grid. cells (rId, 5). getValue ();

If(Grid. cells (rId, 6). isChecked ())

Obj ["isContact"] = "1 ";

Else

Obj ["isContact"] = "0 ";

Obj ["phone"] = grid. cells (rId, 7). getValue ();

Obj ["remark"] = grid. cells (rId, 8). getValue ();

Obj ["sort"] = index;

ObjList. push (obj );

});

AjaxPost ("/base/user/addUpdateUserHomeList ",{

"UserHomeList": JSON. stringify (objList ),

"UserId": $ ("# userId"). val ()

},Function(Data, status ){

Xxxxx

});

Server:

@ RequestMapping ("/addUpdateUserHomeList ")

@ ResponseBody

Public String addUpdateUserHomeList (String userHomeList, String userId ){

List UserHomes = JSON

. ParseArray (userHomeList, UserHome. class );// FastJSON

If (userHomes! = Null & userHomes. size ()> 0 ){

Try {

UserService. addUpdateUserHomeList (userHomes, userId );

} Catch (Exception e ){

E. printStackTrace ();

}

}

Return "200 ";

}

Add the ajaxPost code:

Function ajaxPost (url, dataParam, callback) {var retData = null; $. ajax ({type: "post", url: url, data: dataParam, dataType: "json", success: function (data, status) {// alert (data ); retData = data; if (callback! = Null & callback! = "" & Callback! = Undefined) callback (data, status) ;}, error: function (err, err1, err2) {alertMsg. error ("Call method exception:" + JSON. stringify (err) + "err1" + JSON. stringify (err1) + "err2:" + JSON. stringify (err2) ;}}); return retData ;}