String 转 Map ---- gson

    com.google.code.gson
    gson
    2.8.5

public Map string2map(String str_json) {
  str_json = response.body().string();
    Map res = null;
    try {
        Gson gson = new Gson();
        res = gson.fromJson(str_json, new TypeToken>() {
        }.getType());
    } catch (JsonSyntaxException e) {
    }
    return res;
}