Android數據解析JSON解析之FastJson解析
概述
Fastjson是一個Java語言編寫的高性能功能完善的JSON庫。它采用一種“假定有序快速匹配”的算法,把JSON Parse的性能提升到極致,是目前Java語言中最快的JSON庫.Fastjson接口簡單易用,已經被廣泛使用在緩存序列化,協議交互,Web輸出,Android客戶端等多種應用場景。
數據解析操作
1、將json格式的對象轉換為Java對象
測試數據
{ "id":2, "name":"大蝦", "price":12.3, "imagePath":"https://192.168.10.165:8080/L05_Server/images/f1.jpg" }
代碼:
private void jsonToJavaObjectByFastJson() { // 1 獲取或創建json數據 String json = "{\n" + "\t\"id\":2, \"name\":\"大蝦\", \n" + "\t\"price\":12.3, \n" + "\t\"imagePath\":\"https://192.168.10.165:8080/L05_Server/images/f1.jpg\"\n" + "}\n"; // 2 解析JSON數據 ShopInfo shopInfo = JSON.parseObject(json, ShopInfo.class); // 3 顯示數據 tvFastjsonOrignal.setText(json); tvFastjsonLast.setText(shopInfo.toString()); }
測試結果
08-21 05:50:02.354 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=2 name=大蝦 price=12.3 imagePath=https://192.168.10.165:8080/L05_Server/images/f1.jpg
2、將Java對象轉換為json對象
測試數據
[ { "id": 1, "imagePath": "https://192.168.10.165:8080/f1.jpg", "name": "大蝦1", "price": 12.3 }, { "id": 2, "imagePath": "https://192.168.10.165:8080/f2.jpg", "name": "大蝦2", "price": 12.5 } ]
代碼
private void jsonToJavaListByFastJson() { String json = "[\n" + " {\n" + " \"id\": 1,\n" + " \"imagePath\": \"https://192.168.10.165:8080/f1.jpg\",\n" + " \"name\": \"大蝦1\",\n" + " \"price\": 12.3\n" + " },\n" + " {\n" + " \"id\": 2,\n" + " \"imagePath\": \"https://192.168.10.165:8080/f2.jpg\",\n" + " \"name\": \"大蝦2\",\n" + " \"price\": 12.5\n" + " }\n" + "]"; // 2 解析JSON數據 List shops=JSON.parseArray(json,ShopInfo.class); // 3 顯示數據 tvFastjsonOrignal.setText(json); tvFastjsonLast.setText(shops.toString()); }
測試結果
8-21 05:51:34.314 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=1 name=大蝦1 price=12.3 imagePath=https://192.168.10.165:8080/f1.jpg 08-21 05:51:34.314 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=2 name=大蝦2 price=12.5 imagePath=https://192.168.10.165:8080/f2.jpg
3、將json格式的數組[]轉換為Java對象的List
private void javaToJsonObjectByFastJson() { // 1 創建一個Java對象 ShopInfo shopInfo = new ShopInfo(1, "鮑魚", 250.0, "baoyu"); // 2 生成JSON數據 String json=JSON.toJSONString(shopInfo); // 3 顯示數據 tvFastjsonOrignal.setText(shopInfo.toString()); tvFastjsonLast.setText(json); }
測試結果
4、將Java對象的List轉換為json數組[]
private void javaToJsonArrayByFastJson() { // 1 創建一個Java集合 List shops = new ArrayList<>(); ShopInfo baoyu = new ShopInfo(1, "鮑魚", 250.0, "baoyu"); ShopInfo longxia = new ShopInfo(2, "龍蝦", 251.0, "longxia"); shops.add(baoyu); shops.add(longxia); // 2 生成JSON數據 String json = JSON.toJSONString(shops); // 3 顯示JSON數據 tvFastjsonOrignal.setText(shops.toString()); tvFastjsonLast.setText(json); }
測試結果
5、解析復雜數據
測試數據
{ "data": { "count": 5, "items": [ { "id": 45, "title": "堅果" }, { "id": 132, "title": "炒貨" }, { "id": 166, "title": "蜜餞" }, { "id": 195, "title": "果脯" }, { "id": 196, "title": "禮盒" } ] }, "rs_code": "1000", "rs_msg": "success" }
代碼
/* 解析復雜數據 */ public void fastjsonOfComplex(View view) { // 1 獲取或創建JSON數據 String json = "{\n" + " \"data\": {\n" + " \"count\": 5,\n" + " \"items\": [\n" + " {\n" + " \"id\": 45,\n" + " \"title\": \"堅果\"\n" + " },\n" + " {\n" + " \"id\": 132,\n" + " \"title\": \"炒貨\"\n" + " },\n" + " {\n" + " \"id\": 166,\n" + " \"title\": \"蜜餞\"\n" + " },\n" + " {\n" + " \"id\": 195,\n" + " \"title\": \"果脯\"\n" + " },\n" + " {\n" + " \"id\": 196,\n" + " \"title\": \"禮盒\"\n" + " }\n" + " ]\n" + " },\n" + " \"rs_code\": \"1000\",\n" + " \"rs_msg\": \"success\"\n" + "}"; DataInfo dataInfo = parseObject(json, DataInfo.class); String mag = dataInfo.getRs_msg(); Log.i("TAG", "mag:" + mag); String code = dataInfo.getRs_code(); Log.i("TAG", "code:" + code); int count = dataInfo.getData().getCount(); Log.i("TAG", "count:" + count); for (int i = 0; i < dataInfo.getData().getItems().size(); i++) { String title = dataInfo.getData().getItems().get(i).getTitle(); int id = dataInfo.getData().getItems().get(i).getId(); Log.i("TAG", "詳細數據:" + "\n" + "id=" + id + "\n" + "title=" + title + "\n" ); } tvFastjsonOrignal.setText(json); tvFastjsonLast.setText(dataInfo.toString()); }
測試效果
08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: mag:success 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: code:1000 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: count:5 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=45 title=堅果 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=132 title=炒貨 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=166 title=蜜餞 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=195 title=果脯 08-21 05:55:53.250 4874-4874/com.example.zhangdai.androidjson I/TAG: 詳細數據: id=196 title=禮盒
測試Demo地址
github:https://github.com/TDCQZD/AndroidJson