Spring Rest客户端，将响应对象的一部分解析为Set

Question

I create a simple rest client in spring with jackson for a training. I have two models Country and League. Country has:

private Set<League> leagues;

@JsonProperty("country_id")
private long apiCountryId;
@JsonProperty("country_name")
private String name;

and of course getters and setters League has just id and name. And now I want to get data from apifootbal, the response looks like:

[
    {
        "country_id":"169",
        "country_name":"England",
        "league_id":"62",
        "league_name":"Premier League"
    },
    {
        "country_id":"169",
        "country_name":"England",
        "league_id":"65",
        "league_name":"League 2"
    },
    {
        "country_id":"169",
        "country_name":"England",
        "league_id":"66",
        "league_name":"Nat. League"
    }
]

So 2 first elements are the same, 2 last are different for every object, league is not separate object so I can't just take it out. And right now I don't know how to create one Country object what will looks like:

id: 169,
name: England,
league: [{
    id:"62",
    name:"Premier League"
}, {
    id:"65",
    name:"League 2"
}, {
    id:"66",
    name:"Nat. League"
}]

I know how to create array of country objects where I have all data, but I don't know how separate it to one Country and 3 league objects (and how to add them to collection in country object). One option is to add league_id and league_name to country and after iterate through make league objects from them but it's the only way?

Answer 1

You can write a custom deserializer and write custom logic to handle such data.

Please refer deserialize xml to pojo using jackson xml mapper (The example is in XML but can be similarly used for JSON too)