Java Spring JSON Call with Examples

do this JSON Call On Any event of the html element
to fetch the data from database
Like

<input type="button" Value="Call addMyData" onclick="addMyData()"  />

function addMyData()

{

var name="Hello";

var address="Ahmedabad";



$.ajax({

type : "POST",

dataType : "json",

url :"/hello/addData",    //////THis is RequestMapping Value of controller

                          //  if you are working in spring u cal also write 

                          ///  URL  like url: realativePath/adaData.php  or

                          ///            url: realativePath/addData.jsp  etc

data : {

name:name,

address:address

},

success : function(response) {



console.log(response);    ////This is response from the server After the                                 success of ajax call



},

error:function(s,st){                ///this will be executed if ajax call is failed  or return with error  ////

alert("error"+s);

}

}).done(function() {

alert("Call is Completed");     /////this will execute when ajax call complete

});

}

IN CONTROLLER

you just need to return json data if u want to return any data 

just create a json object

JSONObject json=new JSONObject()

append some data to it

json.put("addedName",name)  // where name is your        variable in controller 

and send this in to response

response.getWriter().write(json.toString());

Now if u want to get this data in json call success

success:function(response){

alert(response.addedName);

}

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