使用java的JSON对象

Question

我有json格式，我想用JSONObject和JSONArray在java代码中创建它，但是我没有得到正确格式的输出。JSON格式如下所示。

var transaction_Data = 
[
    {
    "key": "PASSED",
    "values": [

        {"x": "20 June", "y": 30},
        {"x": "21 June", "y": 50},
        {"x": "22 June", "y": 20},
        {"x": "23 June", "y": 60},
        {"x": "19 June", "y": 20},
        {"x": "24 June", "y": 10}
        ]
    },
    {
    "key": "FAILED",
    "values": [
            {"x": "19 June", "y": 50},
            {"x": "21 June", "y": 30},
            {"x": "20 June", "y": 20},
            {"x": "23 June", "y": 70},
            {"x": "22 June", "y": 45},
            {"x": "24 June", "y": 60}
     ]
   }
]

我如何用java创建这个json对象，因为我想用这个对象创建使用NVD3的多条形图。如有任何帮助，不胜感激！

Answer 1

you can try it out with this POJOs.

class TransactionData {
    private String key;
    private List<Data> values;
    public TransactionData(String key, List<Data> values) {
        this.key = key;
        this.values = values;
    }
}
class Data {
    private String x;
    private Integer y;
    public Data(String x, Integer y) {
        this.x = x;
        this.y = y;
    }
}