android json原生解析
阿新 • • 發佈：2019-01-27
//將json格式的字串{}轉換成java物件 private void jsonToJavaObjectByNative() { //獲取或者建立json資料 String json = "{\n" + "\t\"id\":2,\"name\":\"大蝦\",\n"+ "\t\"price\":12.3,\n"+ "\t\"imagePath\":\"http://192.168.0.1:8080/yht.jpg\"\n"+ "}\n"; //解析json try { JSONObject jsonObject = newJSONObject(json); int id = jsonObject.getInt("id"); int id1 = jsonObject.optInt("id"); String name = jsonObject.optString("name"); double price = jsonObject.optDouble("price"); String imagePath = jsonObject.optString("imagePath"); shopInfo = new ShopInfo(id,name,price,imagePath); } catch(JSONException e) { e.printStackTrace(); } //顯示資料 tv_native_orignal.setText(json); tv_native_last.setText(shopInfo.toString()); }
List<ShopInfo> shopInfos = new ArrayList<>(); //將json格式的字串[] 轉換為java物件的List private void jsonToJavaListByNative() { //獲取或者建立json資料 String json = "[\n" + "\t{\n" + "\t\t\"id\":1,\n" + "\t\t\"imagePath\":\"http://192.168.0.1:8080/test/f1.jpg\",\n" + "\t\t\"name\":\"袁合濤1\",\n" + "\t\t\"price\":\"12.3\"\n" + "\t},\n" + "\t{\n" + "\t\t\"id\":2,\n" + "\t\t\"imagePath\":\"http://192.168.0.1:8080/test/f2.jpg\",\n" + "\t\t\"name\":\"袁合濤2\",\n" + "\t\t\"price\":\"12.5\"\n" + "\t}\n" + "]"; //解析json資料 try { JSONArray jsonArray = new JSONArray(json); for(int i = 0;i < jsonArray.length();i++){ JSONObject jsonObject = jsonArray.getJSONObject(i); if(null != jsonObject){ int id = jsonObject.getInt("id"); String name = jsonObject.optString("name"); double price = jsonObject.optDouble("price"); String imagePath = jsonObject.optString("imagePath"); ShopInfo shopInfo = new ShopInfo(id,name,price,imagePath); shopInfos.add(shopInfo); } } } catch (JSONException e) { e.printStackTrace(); } //顯示json tv_native_orignal.setText(json); tv_native_last.setText(shopInfos.toString()); }
解析複雜的json資料，需要一層一層的進行解析。
JSONObject jsonObject = new JSONObject(json); //第一層解析 JSONObject data = jsonObject.optJSONObject("data"); String retcode = jsonObject.optString("retcode"); //第二次解析 String countcommenturl = data.optString("countcommenturl"); String more = data.optString("more"); JSONArray news = data.optJSONArray("news"); //第三次解析 for(int i = 0;i<news.length();i++){ JSONObject jsonObject1 = news.optJSONObject(i); if(null != jsonObject1){ int id = jsonObject1.optInt("id"); String title = jsonObject1.optString("title"); } } } catch (JSONException e) { e.printStackTrace(); } }
//將json格式的字串{}轉換為java物件 private void jsonToJavaObjectByGson() { //獲取或建立json資料 String json = "{\n" + " \"id\": 1,\n" + " \"imagePath\": \"http://192.168.0.1:8080/test/f1.jpg\",\n" + " \"name\": \"袁合濤1\",\n" + " \"price\": \"12.3\"\n" + "}"; //開始解析 Gson gson = new Gson(); ShopInfo shopInfo = gson.fromJson(json, ShopInfo.class); //顯示json資料 tv_gson_orignal.setText(json); tv_gson_last.setText(shopInfo.toString()); }
//將json格式的字串[]轉換為java物件的List private void jsonToJavaListByGson() { //建立或獲取json資料 String json = "[\n" + " {\n" + " \"id\": 1,\n" + " \"imagePath\": \"http://192.168.0.1:8080/test/f1.jpg\",\n" + " \"name\": \"袁合濤1\",\n" + " \"price\": \"12.3\"\n" + " },\n" + " {\n" + " \"id\": 2,\n" + " \"imagePath\": \"http://192.168.0.1:8080/test/f2.jpg\",\n" + " \"name\": \"袁合濤2\",\n" + " \"price\": \"12.5\"\n" + " }\n" + "]"; //解析json資料 Gson gson = new Gson(); List<ShopInfo> shops = gson.fromJson(json, new TypeToken<List<ShopInfo>>() { }.getType()); //資料展示 tv_gson_orignal.setText(json); tv_gson_last.setText(shops.toString()); }
//將java物件轉換為json字串[] private void javaToJsonArrayByGson() { //獲取或建立java物件 List<ShopInfo> shops = new ArrayList<>(); ShopInfo baoyu = new ShopInfo(1, "鮑魚", 250.3, "baoyu"); ShopInfo longixa = new ShopInfo(1, "龍蝦", 251.3, "longixa"); shops.add(baoyu); shops.add(longixa); //生成json資料 Gson gson = new Gson(); String json = gson.toJson(shops); //展示資料 tv_gson_orignal.setText(shops.toString()); tv_gson_last.setText(json); } //將java物件轉換為json字串{} private void javaToGsonObjectByGson() { //獲取或建立java物件 ShopInfo shopInfo = new ShopInfo(1,"鮑魚",250.2,"baoyu"); //生成json資料 Gson gson = new Gson(); String json = gson.toJson(shopInfo); //展示資料 tv_gson_orignal.setText(shopInfo.toString()); tv_gson_last.setText(json); }
FastJson
//將json格式的字串{}轉換為java物件 private void jsonToJavaObjectByFastJson() { //獲取或建立json資料 String json = "{\n" + " \"id\": 1,\n" + " \"imagePath\": \"http://192.168.0.1:8080/test/f1.jpg\",\n" + " \"name\": \"袁合濤1\",\n" + " \"price\": \"12.3\"\n" + "}"; //解析json資料 ShopInfo shopInfo = JSON.parseObject(json,ShopInfo.class); //顯示資料 tv_fastjson_orignal.setText(json); tv_fastjson_last.setText(shopInfo.toString()); }
//將json格式的字串[]轉換為java物件的List private void jsonToJavaListByFastJson() { //建立或獲取json資料 String json = "[\n" + " {\n" + " \"id\": 1,\n" + " \"imagePath\": \"http://192.168.0.1:8080/test/f1.jpg\",\n" + " \"name\": \"袁合濤1\",\n" + " \"price\": \"12.3\"\n" + " },\n" + " {\n" + " \"id\": 2,\n" + " \"imagePath\": \"http://192.168.0.1:8080/test/f2.jpg\",\n" + " \"name\": \"袁合濤2\",\n" + " \"price\": \"12.5\"\n" + " }\n" + "]"; //解析JSon資料 List<ShopInfo> shopInfos = JSON.parseArray(json, ShopInfo.class); //顯示資料 tv_fastjson_orignal.setText(json); tv_fastjson_last.setText(shopInfos.toString()); }
//將java物件轉換為json字串[] private void javaToJsonArrayByFastJson() { //建立一個java集合 List<ShopInfo> shops = new ArrayList<>(); ShopInfo yht = new ShopInfo(1, "yht", 25.3, "jj"); ShopInfo yyy = new ShopInfo(2, "yyy", 25.3, "yyyyy"); shops.add(yht); shops.add(yyy); //生成json資料 String jsonString = JSON.toJSONString(shops); //展示資料 tv_fastjson_orignal.setText(shops.toString()); tv_fastjson_last.setText(jsonString); } //將java物件轉換為json字串{} private void javaToJsonObectByFastJson() { //建立一個java物件 ShopInfo shopInfo = new ShopInfo(1,"合濤",320.2,"hetao"); //將java轉換為json String json = JSON.toJSONString(shopInfo); //顯示資料 tv_fastjson_orignal.setText(shopInfo.toString()); tv_fastjson_last.setText(json); }