How to use Rest Template to step into a JSON object? - json

Question

I have learned how to use a rest template to access a JSON array like this:
[
{
"ID": "0ae6496f-bb0b-4ebd-a094-ca766e82f3e7",
"Confirmed": 0,
}
{
"ID": "e010ced5-c7cb-4090-a7ed-206f4c482a5b",
"Confirmed": 0,
}
]
I accessed the Confirmed for example with
public Model[] getModel() {
ResponseEntity<Model[]> response = restTemplate.getForEntity(apiUrl, Model[].class);
return response.getBody();
}
but now I have to access data in another Json from another API. The data looks like this
{
"prefixes": [
{
"region": "ap-northeast-2",
"service": "AMAZON",
},
{
"region": "eu-west-3",
"service": "AMAZON",
}
]
}
How can I access region or service inside, and what would be the proper name for this?
The first is a JSON array, the second a JSON object?
The first API is simply
https://example.com
Whereas the second is
https://example.com/data.json.

Answer 1

You have to create the POJO for return type:
List<RegionServiceObject> items;
Where RegionServiceObject looks:
public class RegionServiceObject {
private String region;
private String service;
// constructors, getters/setters, toString()....
}
The way of deseariliseing to object is similar to which you already wrote:
RegionServiceObject[] items = restTemplate.getForObject(url, RegionServiceObject[].class);
and access for specific item will be as usual for specific item:
for (RegionServiceObject item : items) {
item.getRegion();
item.getService();
// use them here
}