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