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我写了一个程序,读取一个简单的JSON文件:阅读JSON文件
public static void main(String[] args) {
JSONParser parser = new JSONParser();
try {
JSONArray a = (JSONArray) parser.parse(new FileReader("C:/Users/Zonoid/Desktop/EQ.json"));
for (Object o : a)
{
JSONObject obj = (JSONObject) o;
String city = (String) obj.get("CITY");
System.out.println("City : " + city);
String loc = (String) obj.get("LOCATION");
System.out.println("Location : " + loc);
long el = (Long) obj.get("E_LEVEL");
System.out.println("Emergency Level : " + el);
long depth = (Long) obj.get("DEPTH");
System.out.println("Depth : " + depth);
long i = (Long) obj.get("INTENSITY");
System.out.println("Intensity :"+i);
System.out.println("\n");
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
与我的JSON文件的存在:
[{"CITY":"MUMBAI","LOCATION":"a" ,"E_LEVEL": 6,"DEPTH":10,"INTENSITY":5},
{"CITY":"MUMBAI","LOCATION":"b" ,"E_LEVEL": 8,"DEPTH":20,"INTENSITY":4},
{"CITY":"MUMBAI","LOCATION":"c" ,"E_LEVEL": 3,"DEPTH":13,"INTENSITY":5},
{"CITY":"MUMBAI","LOCATION":"d" ,"E_LEVEL": 6,"DEPTH":12,"INTENSITY":4},]
我工作的一个项目是处理地震警报并希望阅读他们的JSON文件,但是我无法将它们导入到JSON数组中。该文件我想进口看起来像这样:
{
"type": "FeatureCollection",
"metadata": {
"generated": 1488472809000,
"url": "https:\/\/earthquake.usgs.gov\/earthquakes\/feed\/v1.0\/summary\/significant_week.geojson",
"title": "USGS Significant Earthquakes, Past Week",
"status": 200,
"api": "1.5.4",
"count": 2
},
"features": [
{
"type": "Feature",
"properties": {
"mag": 5.5,
"place": "42km WSW of Anchor Point, Alaska",
"time": 1488420690658,....
请告诉一下修改的话。
你发布的代码有什么问题? –
它给出了错误org.json.simple.JSONObject不能转换为org.json.simple.JSONArray \t at practice.json.main(json.java:17) – apoorv
我现在看到。你需要改变你的json文件。 json文件包含一个对象(它以{开始并以}结尾),你希望它成为一个对象数组(以[{开始并以}结尾]开头 –