GSON

Running Gson source Codew

注释

给GitHub PR

https://www.bilibili.com/video/BV1JJ41197UK?spm_id_from=333.337.search-card.all.click

json格式

数组 [1,2,3]

对象格式 {“key”:”value”}

$Gson$Types理解

官方教程 https://github.com/google/gson/blob/master/UserGuide.md

源码分析
http://www.jianshu.com/p/89c314ae8c0b

Gson转map

Gson可以直接把json转为map,但是在转成map时，默认將int long型的数字,转换成doublel类型

String sms = "{\"Code\":200,\"Data\":{\"Code\":\"\"},\"Message\":\"发送成功\"}";
Map<String, Object> map = new Gson().fromJson(sms, HashMap.class);

这里装成map后，Code值尾 200.0 ,解析方法

Gson gson = new GsonBuilder()
          .registerTypeAdapter(new TypeToken<TreeMap<String, Object>>() {
          }.getType(), new JsonDeserializer<TreeMap<String, Object>>() {

              @Override
              public TreeMap<String, Object> deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
                  TreeMap<String, Object> treeMap = new TreeMap<>();
                  JsonObject jsonObject = json.getAsJsonObject();
                  Set<Map.Entry<String, JsonElement>> entrySet = jsonObject.entrySet();
                  for (Map.Entry<String, JsonElement> entry : entrySet) {
                      treeMap.put(entry.getKey(), entry.getValue());
                  }
                  return treeMap;
              }
          }).create();

参考

• map to json(生成json数据)

    HashMap<String, Object> map = new HashMap<>();
    map.put("key", "real_name");
    map.put("value", userName);
    list.add(map);
    map = new HashMap<>();
    map.put("key", "mobile_phone");
    map.put("value", userPhone);
    map.put("hidden", false);
    list.add(map);
    userInfo.data = new Gson().toJson(list);
  

• kotlin json to object

val type = object : TypeToken<BaseCount<List<Site>>>() {}.type
var response = gson.fromJson<BaseCount<List<Site>>>(json, type)

https://ask.helplib.com/java/post_498433

java parse

 public static List<RecipeBean> analysisChild(String receps) throws JSONException {
        List<RecipeBean> list = new ArrayList<>();
//        JSONObject jsonObject = new JSONObject();
        JSONArray jsonArray = new JSONArray(receps);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject object = jsonArray.getJSONObject(i);
            RecipeBean mPatient = new RecipeBean(TYPE_ITEM);
            if (object.has("drug_name")){
                mPatient.setDrug_name(object.getString("drug_name"));
            }
            if (object.has("drug_num")){
               mPatient.setDrug_num(object.getString("drug_num"));
            }
            if (object.has("frequency")){
             mPatient.setFrequency(object.getString("frequency"));
            }
            if (object.has("num")){
               mPatient.setNum(object.getString("num"));
            }
            if (object.has("drug_num")){
               mPatient.setDrug_num(object.getString("drug_num"));
            }
            if (object.has("pharmacy_type")){
               mPatient.setPharmacy_type(object.getString("pharmacy_type"));
            }
            if (object.has("medicine_num")){
             mPatient.setMedicine_num(object.getString("medicine_num"));
            }
            if (object.has("medicine_unit")){
              mPatient.setMedicine_unit(object.getString("medicine_unit"));
            }
            list.add(mPatient);
        }
        return list;
    }