JSON字串與HashMap相互轉換

將json轉map##

  /**
     * @param content json字串
     * @return  如果轉換失敗返回null,
     */
  public  static   Map<String, Object> jsonToMap(String content) {
        content = content.trim();
        Map<String, Object> result = new HashMap<>();
        try {
            if (content.charAt(0) == '[') {

                JSONArray jsonArray = new JSONArray(content);
                for (int i = 0; i < jsonArray.length(); i++) {
                    Object value = jsonArray.get(i);
                    if (value instanceof JSONArray || value instanceof JSONObject) {
                        result.put(i + "", jsonToMap(value.toString().trim()));
                    } else {
                        result.put(i + "", jsonArray.getString(i));
                    }
                }
            } else if (content.charAt(0) == '{'){
                JSONObject jsonObject = new JSONObject(content);
                Iterator<String> iterator = jsonObject.keys();
                while (iterator.hasNext()) {
                    String key = iterator.next();
                    Object value = jsonObject.get(key);
                    if (value instanceof JSONArray || value instanceof JSONObject) {
                        result.put(key, jsonToMap(value.toString().trim()));
                    } else {
                        result.put(key, value.toString().trim());
                    }
                }
            }else {
//                Log.e("異常", "json2Map: 字串格式錯誤");
            }
        } catch (JSONException e) {
//            Log.e("異常", "json2Map: ", e);
            result = null;
        }
        return result;
    }
入程式碼片

將json轉換為map

  /**把資料來源HashMap轉換成json
     * @param map
     */
    public static String hashMapToJson(Map<String, Object> map) {
        String string = "{";
        for (Iterator it = map.entrySet().iterator(); it.hasNext();) {
            Map.Entry e = (Map.Entry) it.next();
            string += "'" + e.getKey() + "':";
            string += "'" + e.getValue() + "',";
        }
        string = string.substring(0, string.lastIndexOf(","));
        string += "}";
        return string;
    }