Json序列化反序列化

 public static Map<String, Object> jsonString2map(String strJson) throws ResourceFilterException {
        Gson gson = new GsonBuilder().registerTypeAdapter(Map.class, new TypeAdapter<HashMap<String, Object>>() {
            @Override
            public HashMap<String, Object> read(JsonReader in) throws IOException {
                final HashMap<String, Object> map = new LinkedHashMap<>();
                in.beginObject();
                while (in.hasNext()) {
                    // replace the value if the key is existed
                    map.put(in.nextName(), in.nextString());
                }
                in.endObject();
                return map;
            }
            @Override
            public void write(JsonWriter out, HashMap<String, Object> value) throws IOException {
                out.beginObject();
                for (Map.Entry<String, Object> entry : value.entrySet()) {
                    out.name(entry.getKey()).value((String) entry.getValue());
                }
                out.endObject();
            }
        }).create();
        Map<String, Object> jsonMap = new LinkedHashMap<String, Object>();
        try {
            jsonMap = gson.fromJson(strJson, new TypeToken<Map<String, String>>() {}.getType());
        } catch (Exception e) {
        
        }
    }

public static String map2Json(Map<String, String> map) {
  Gson gson = new GsonBuilder().setPrettyPrinting().create();
   return gson.toJson(map);
 }

public static String map2Json(Map<String, String> map) {
  Gson gson = new GsonBuilder().create();
  return gson.toJson(kvMap);
}