解决“No 'Access-Control-Allow-Origin' header is present on the requested resource”

1. Problem description

Use ajax request in js to print the following error message under the web console:

XMLHttpRequest cannot load http://192.168.2.46:8000/account/getjson/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:63342' is therefore not allowed access.

My ajax code is as follows

var jsontree = [];
$.ajax({
    url: "http://192.168.2.46:8000/account/getjson/",
    type: "GET",
    dataType: 'JSON',
    success: function(result){
        jsontree = result;
    }
});

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2. Solution

dataType: 'JSON'Replace the above with dataType: 'JSONP'.