使用fastjson對Map或List實現快速Json格式轉換
阿新 • • 發佈：2018-12-30
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/***
* 利用alibaba的fastjson將資料轉化為Json格式
*/
public class Transform2Json {
/** 將Map轉換為JsonObject */
public static JSONObject map2JsonObject(){
HashMap<Object, Object> hp = new HashMap<>();
hp.put("lat",32.7681);
hp.put("lon","114.1379");
hp.put("header","iron");
hp.put("request","post");
hp.put("page","1");
String s = JSON.toJSONString(hp);
JSONObject jsonObject = JSONObject.parseObject(s);
return jsonObject;
}
/** 將List<Map>格式資料轉換為JsonArray */
public static JSONArray list2JsonArray(){
ArrayList<Map<Object, Object>> maps = new ArrayList<>();
HashMap<Object, Object> dataMap = new HashMap<>();
HashMap<Object, Object> dataMap1 = new HashMap<>();
dataMap.put("request","get");
dataMap.put("status",200);
dataMap.put("header","git");
dataMap1.put("block","1");
maps.add(dataMap);
maps.add(dataMap1);
String s1 = JSON.toJSONString(maps);
JSONArray jsonArray = JSONArray.parseArray(s1);
return jsonArray;
}
public static void main(String[] args) {
JSONObject jsonObject = map2JsonObject();
JSONArray jsonArray = list2JsonArray();
System.out.println("Map轉換JsonObject後:"+jsonObject);
System.out.println("List轉換JsonArray後:"+jsonArray);
}
}
執行結果如下：
Map轉換JsonObject後:{"request":"post","header":"iron","lon":"114.1379","page":"1","lat":32.7681}
List轉換JsonArray後:[{"request":"get","header":"git","status":200},{"block":"1"}]
Process finished with exit code 0