gson test

test.java

package com.example.demo;

import com.google.gson.*;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@SpringBootTest
class DemoApplicationTests {

    @Test
    void contextLoads() {
        String s = "{\n" +
                "    \"code\": 200,\n" +
                "    \"data\": {\n" +
                "        \"specs\": \"[{\\\"name\\\":\\\"容量\\\",\\\"values\\\":[\\\"120G\\\",\\\"260G\\\"]},{\\\"name\\\":\\\"网络型号\\\",\\\"values\\\":[\\\"移动\\\",\\\"联通\\\",\\\"全网通\\\"]}]\"\n" +
                "    },\n" +
                "    \"message\": \"请求成功\"\n" +
                "}";
        Gson gson = new GsonBuilder().registerTypeAdapter(CArray.class, new TypeAd()).create();
        A json = gson.fromJson(s, A.class);
        CArray specs = json.data.specs;

        System.out.println(new Gson().toJson(specs));
//        System.out.println(specs);
//        JsonArray specObj = gson.fromJson(specs, JsonArray.class);
//        System.out.println(specObj.get(0));
    }

    final class A {
        public B data;
    }

    final class B {
        public CArray specs;
    }

    final class C {
        public String name;
        public String[] values;
    }

    final class CArray extends ArrayList<C> {

    }

    final class TypeAd extends TypeAdapter<CArray> {
        @Override
        public void write(JsonWriter jsonWriter, CArray c) throws IOException {

        }

        @Override
        public CArray read(JsonReader jsonReader) throws IOException {
            String s = jsonReader.nextString();
            C[] o = new Gson().fromJson(s, C[].class);
            CArray cs = new CArray();
            cs.addAll(List.of(o));
            return cs;
        }
    }
}