How can I prevent gson from converting integers to doubles

Question

I\'ve got integers in my json, and I do not want gson to convert them to doubles. The following does not work:

@Test
public void keepsIntsAsIs(){
    String          


        

Answer 1

Use Jackson instead of Gson, It solves your problem:

import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.Map;

public class JacksonMapExample1 {

public static void main(String[] args) {

    ObjectMapper mapper = new ObjectMapper();
    String json = "{\"name\":\"mkyong\", \"age\":\"37\"}";
    try {
        // convert JSON string to Map
        Map map = mapper.readValue(json, Map.class);
        System.out.println(map);

    } catch (IOException e) {
        e.printStackTrace();
    }

}
}