将布尔值序列化为GSON中的字符串Y或N

import com.google.gson.JsonElement;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

import java.lang.reflect.Type;

public class BooleanSerializer implements JsonSerializer<Boolean> {
    @Override
    public JsonElement serialize(Boolean src, Type typeOfSrc, JsonSerializationContext context) {
        if (src) {
            return new JsonPrimitive("Y");
        } else {
            return new JsonPrimitive("N");
        }
    }
}

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class Main {
    public static void main(String[] args) {
        Gson gson = new GsonBuilder()
                .registerTypeAdapter(Boolean.class, new BooleanSerializer())
                .create();
        
        Boolean value = true;
        String json = gson.toJson(value);
        System.out.println(json); // 输出 "Y"
    }
}