javascript - JSON data 400 Bad request Error -

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i have json data sending server. when submit printing data in console not sending server.

it gives following error

post http://localhost:8080/rest/review/createreview 400 (bad request)

here code

var promise = jquery.ajax({       url: 'http://localhost:8080/rest/review/createreview',       type: 'post',       data: '{myreview: myreview}',       datatype: "text",       contenttype: "application/json",       success: function (data) {            console.log("request successful", data);       },       error: function (data) {           console.log("request failed", data);        }     });

it may data not valid json. try:

data: json.stringify({myreview: myreview})

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