What are the ajax interaction methods between the front end and the back end?-JS Tutorial-php.cn

What are the ajax interaction methods between the front end and the back end?

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Release： 2018-04-02 13:44:37

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This time I will bring you some ajax interaction methods between the front end and the back end. What are the ajax interactions between the front end and the back end? Front-end ajax and back-end Spring MVC

Controller

There are the following five data interaction methods. (dhtmlxGrid is used in the frontend and fastjson is used in the backend)

Method 1: Pass parameters through URLHook parameters through URL, such as / auth/getUser?userid='6'

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

Method 2 single-value parameter passingThe front-end call is:

ajaxPost("/base/user/exchangeSort",{"id":rid,"otherid":otherid},function(data,status){
xxxxxx
xxxxxx
});

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The server side is:

public String exchangeSort(String id, String otherid)

Method 3 object parameter passingForeground call such as:

var org={id:id};
ajaxPost("/base/org/getOrgById", org,function(data,textStatus){
xxxx
xxxx
});

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The server side is:

public Org getOrgById(Org org)

Method 4Object serializationPassing parametersForeground call such as:

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

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var ueser={ };//创建对象
user["id"]=id;
user["name"]=$("#name").val();
user["dept"]={};//外键对象
user["dept"]["id"]=$("#deptid").val();
ajaxPost("/base/user/addUser",{"userObj":JSON.stringify(user)},function(data){xxxx;xxxxx;});

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The server side is:

@RequestMapping("/findById")
@ResponseBody
public UserInfo findById(String userObj) {
//使用fastJSON
UserInfo user = JSON.parseObject(userObj, UserInfo.class);
user = (UserInfo) userService.findById(UserInfo.class, user.getId());
return user;
}

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Method five list parameter passingForeground code such as:

var objList = new Array();
grid.forEachRow(function(rId) {
var index = grid.getRowIndex(rId);
var obj = {};
obj["id"] = rId;
obj["user"] = {};
obj["user"]["id"] = $("#userId").val();
//不推荐这样的写法
//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()!="") {
var str = grid.cells(rId, 3).getValue().split("-");
var day = parseFloat(str[2]);
var month = parseFloat(str[1])-1;
var year = parseInt(str[0]);
var date=new Date();
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
});

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Server side:

@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";
}

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Attached is 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("调用方法发生异常:"+JSON.stringify(err)+"err1"+ JSON.stringify(err1)+"err2:"+JSON.stringify(err2)); 
} 
}); 
return retData; 
}

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I believe you have mastered it after reading the case in this article Method, for more exciting information, please pay attention to other related articles on the php Chinese website!