使用Gson的JSON格式

Question

I am returning a dataset from database in List and converting them into a JSON as below.

List<DensityGroup> dg = pdao.getProductPropListData("Density");
String data = new Gson().toJson(dg);
System.out.println(data);

I am facing below problems:

1. System.out is printing the following in console.

[
    {"densityId":"11","densityDescription":"Mcvr"},
    {"densityId":"14","densityDescription":"test"}
]

I am getting the below response into browser with escape characters (I am making an AJAX call)

{"data":"[{\"densityId\":\"11\",\"densityDescription\":\"Mcvr\"},{\"densityId\":\"14\",\"densityDescription\":\"test\"}]"}

2. I need the following format. The extra quotes before [ is making my dataTable a mess-up.

{
    "data": [
        {"densityId":"11","densityDescription":"Mcvr"},
        {"densityId":"14","densityDescription":"test"}
    ]
}

3. I don't need the escaping quotes before every double quotes in my current output. Please help me.

EDIT : Adding screenshots from Browser Console:

Answer 1

This should work, if you're happy doing it within your Javascript:

var str = {"data":"[{\"densityId\":\"11\",\"densityDescription\":\"Mcvr\"},{\"densityId\":\"14\",\"densityDescription\":\"test\"}]"}

var data = JSON.parse(JSON.stringify(str).replace(/\\\"/g, '"').replace(/\"\[/g, '[').replace(/\]\"/g, ']'));

console.log(data);

It should work, but it might be better to fix it as it's coming from your server instead.