I'm a Talend developer and i have a json files that contain a dynamic part and static part, my problem is in the dynamic part because i can't get the keys so i change to create a java class to get the keys.
my file is like this :
[
{
"data": {
"1801": "1801_13",
"293954": "293954_1",
"293985": "noir",
"294071": "294071_3",
"ean": "5035915032563",
"Nature": "450"
},
"creation_date": "2018-08-28T12:25:06.638Z",
"update_date": "2018-08-28T12:32:55.640Z",
},
{
"data": {
"2633": "1801_13",
"293954": "293954_1",
"ean": "5035236232070",
"Nature": "301"
},
"creation_date": "2018-08-28T12:25:06.638Z",
"update_date": "2018-08-28T12:32:55.640Z",
} ]
data : dynamic part, and in this part i have two static keys (ena and nature) and the others keys are dynamic like this example.
I create a many class java but without success.
i create this class java
package routines;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.simple.JSONObject;
import org.json.simple.parser.*;
public class getKeyFromFile {
public static void main(String filepath) throws ParseException, JSONException {
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader( filepath));
JSONObject jsonObject = (JSONObject)obj ;
printJSON((JSONObject) jsonObject);
} catch (FileNotFoundException e) {
} catch (IOException ioe) {
}
}
public static void printJSON(JSONObject jsonObj) {
for (Object keyObj : jsonObj.keySet()) {
String key = (String)keyObj;
Object valObj = jsonObj.get(key);
if (valObj instanceof JSONObject) {
// call printJSON on nested object
printJSON((JSONObject) valObj);
} else {
// print key-value pair
System.out.println("key : "+key);
System.out.println("value : "+valObj.toString());
}
}
}}
i get this error :
java.lang.ClassCastException: org.json.simple.JSONArray cannot be cast to org.json.JSONArray
Can you help me please.
