how to read a json file by hashMap in java - json

Question

I have a very simple question. I want to read a json file by hashMap in java.
For example I have a json file like this:
{
"list": [
{
"ID" : "#12354667",
"value" : "data1."
}
{
"ID" : "#12345789",
"value" : "data2"
}
And whenever I call the id it returns the value. I have written this but I do not know how to read the file. Any help?
Thanks,
private JsonReader() throws IOException {
//readfile?
this.messages = new HashMap<String, String>();
}
public String getValue(final String ID)
{
if (this.messages.containsKey(ID))
{
return this.messages.get(value);
}
return "";
}

Answer 1

You can use JSONParser and FileReader to read your file into your Application. I'm not quite sure if this is what you searched for, but you can try it. You only have to give your ID to this method.
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader("c:\\yourFile.json"));
JSONObject jsonObject = (JSONObject) obj;
// loop array
JSONArray list= (JSONArray) jsonObject.get("list");
Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
String id= (String) jsonObject.get("ID");
if(id.equals(hereYourFinalString ID)){
String value = (String) jsonObject.get("value");
System.out.println(value);
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}