Parse JSON object with string and value only - java

I have problem when trying to parse with minimum value to map in Android.
There some sample JSON format with more information ex:
[{id:"1", name:"sql"},{id:"2",name:"android"},{id:"3",name:"mvc"}]
This that example most common to use and easy to use just use getString("id") or getValue("name").
But how do I parse to map using this JSON format with just only string and value minimum format to java map collection using looping. And because the string json will always different one with another. ex:
{"1":"sql", "2":"android", "3":"mvc"}
Thank


You need to get a list of all the keys, loop over them and add them to your map as shown in the example below:
String s = "{menu:{\"1\":\"sql\", \"2\":\"android\", \"3\":\"mvc\"}}";
JSONObject jObject = new JSONObject(s);
JSONObject menu = jObject.getJSONObject("menu");
Map<String,String> map = new HashMap<String,String>();
Iterator iter = menu.keys();
while(iter.hasNext()){
String key = (String)iter.next();
String value = menu.getString(key);
map.put(key,value);
}


My pseudocode example will be as follows:
JSONArray jsonArray = "[{id:\"1\", name:\"sql\"},{id:\"2\",name:\"android\"},{id:\"3\",name:\"mvc\"}]";
JSON newJson = new JSON();
for (each json in jsonArray) {
String id = json.get("id");
String name = json.get("name");
newJson.put(id, name);
}
return newJson;

Related

How to get data values from JobDataMap?

I have a JobDataMap Object
JobDataMap dataMap = context.getJobDetail().getJobDataMap();
String[] key = dataMap.getKeys();
key is foo as String,
key is data data have a json like this=> {"abc":"xyz","pqr":"123wer"}.
I want to get values from data object and set to String.
For eg: String abc = data.abc; Here I want to set value from data.
How do I get values from data object? Please help me....

solution is below:
String dataValue = dataMap.get("data").toString();
JSONParser parser = new JSONParser();
JSONObject json = (JSONObject) parser.parse(dataValue);
or we can also use objectMapper instead JSONParser.
String abc = (String) json.get("abc")

How to iterate over JSONObject and found id by value which already known, for example I want to get id of value "ТС-41" how can I do it?

{
"0":"",
"54049":"ОП.мз-61а",
"100606":"КМ-41",
"100609":"МТ-41",
"100612":"ЕМ-41",
"100684":"ХК-51",
"100685":"ЕМ-51",
"100687":"КМ-51",
"100688":"МТ-51",
"100718":"ХК-51/1",
"100719":"ХК-51/2",
"100748":"ТС-61",
"100749":"ТС-61/1",
"100750":"ТС-61/2",
"100754":"ЕМ-61",
"100758":"ІМ-61/1МБ",
"100759":"ІМ-61/2ГТ",
"100760":"МБ-61",
"100767":"ТС-51",
"100770":"ТС-41",
"100777":"ТС.м-61",
"100778":"МТ.м-61",
"100779":"ЕМ.м-61",
"100780":"ТМ.м-61",
"100781":"ТМ.м-62",
"100782":"ГМ.м-61",
"100783":"ВІ.м-61",
"100786":"ХМ.м-61"
}

You'll need to iterate over the JSONObject keys and compare the value until a match.
final String knownValue = "TC-41";
final Iterator<String> iterable = jsonObject.keys();
while (iterable.hasNext()) {
String key = iterable.next();
if (jsonObject.getString(key).equals(knownValue)) {
// key has the value you are looking for
return;
}
}

Use JSON Classes for parsing
JSONObject mainObject = new JSONObject(Your_Sring_data);
String id = mainObject .getString("100770");
//here in this **id** string you can get value for **"TC-41"**

Parse JSON with Unknown values

I have some function where I receive such JSON:
String sorting ->> {"state":"desc"}
String filter ->> {"clientID":"XML"}
All value within are always different. How can I get Key and Value for such JSON?
Lets say :
KEYsorting =state , Valuesorting = desc
KEYfilter =clientID, Valuefilter = XML
I have searched a lot - including this website - but couldn't dealt with it. I guess it is not very difficult I I wasn't able to do that. Please help

You need to get a list of all the keys, loop over them and add them to your map as shown in the example below:
String sorting = "{\"state\":\"desc\"}";
JSONObject filter = new JSONObject(sorting);
Map<String,String> map = new HashMap<String,String>();
Iterator iter = filter.keys();
while(iter.hasNext()){
String key = (String)iter.next();
String value = filter.getString(key);
map.put(key,value);
}
you can try above example.

Put a Java Map to JSON

I have a map of string objects and keys that I wish to put to a json file. I have read that the way to do it is by converting it to an array, and it only works with maps where both the object and key are strings. I can create a JSONObject from the map fine, but cannot put that to an array. Can someone tell me why this does not work?
private static final String JSON_USER_VOTES = "user_votes";
private Map<String, String> mCheckedPostsMap; //This is populated elsewhere
JSONObject obj=new JSONObject(mCheckedPostsMap);
JSONArray array=new JSONArray(obj.toString()); // <<< Error is on this line
json.put(JSON_USER_VOTES, array);
Here is the error:
org.json.JSONException: Value {"232":"true","294":"true"} of type org.json.JSONObject cannot be converted to JSONArray

If you want all of initial map entries enclosed in one JSON object, you can use:
JSONArray array = new JSONArray().put(obj);
This will produce something like
[{"key1:"value1","key2":"value2"}]
If you want each of initial map entries as different JSON object, you can use:
JSONObject obj = new JSONObject(map);
JSONArray array = new JSONArray();
for(Iterator iter = obj.keys(); iter.hasNext(); ){
String key = (String)iter.next();
JSONObject o = new JSONObject().put(key, map.get(key));
array.put(o);
}
This will produce something like
[{"key1:"value1"}, {"key2":"value2"}]

How to decode json without knowing the key/name string?

I am receiving a json string in the following format:
{"27":{"id":"27","uid":"4","title":"teamer.zapto.org","url":"www.google.jo","ip":"74.125.234.63","enabled":"1","services":{"Http 1":{"status":"1","ts":"1355058071"}},"fetch_interval":"60","ping_shift":"0"},
"30":{"id":"30","uid":"4","title":"google","url":"www.google.com","ip":"74.125.234.114","enabled":"1","services":{"Http 1":{"status":"1","ts":"1355058079"}},"fetch_interval":"60","ping_shift":"0"},
"31":{"id":"31","uid":"4","title":"facebook.com","url":"facebook.com","ip":"69.171.247.21","enabled":"1","services":{"Http 1":{"status":"1","ts":"1355058095"}},"fetch_interval":"60","ping_shift":"0"},
"32":{"id":"32","uid":"4","title":"ebir","url":"www.ebir.com","ip":"74.52.50.226","enabled":"1","services":{"Ftp":{"status":"1","ts":"1355058073"},"Http 1":{"status":"1","ts":"1355058073"}},"fetch_interval":"60","ping_shift":"0"},
"33":{"id":"33","uid":"4","title":"zapto","url":"teamer.zapto.org","ip":"200.35.150.6","enabled":"1","services":{"Http 1":{"status":"0","ts":"1355056146"}},"fetch_interval":"3600","ping_shift":"2"},
"35":{"id":"35","uid":"4","title":"vogella.com","url":"vogella.com","ip":"46.163.79.226","enabled":"1","services":{"Ftp":{"status":"1","ts":"1355058098"},"Http 1":{"status":"1","ts":"1355058098"}},"fetch_interval":"60","ping_shift":"0"},
"36":{"id":"36","uid":"4","title":"msn","url":"www.msn.com","ip":"131.253.13.140","enabled":"1","services":{"Http 1":{"status":"1","ts":"1355058103"}},"fetch_interval":"60","ping_shift":"0"},
"37":{"id":"37","uid":"4","title":"dubizzle.com","url":"www.dubizzle.com","ip":"94.236.93.152","enabled":"1","services":{"Http 1":{"status":"1","ts":"1355058068"}},"fetch_interval":"60","ping_shift":"0"},
"38":{"id":"38","uid":"4","title":"olx.jo","url":"olx.jo","ip":"204.74.99.100","enabled":"1","services":{"Http 1":{"status":"1","ts":"1355058108"}},"fetch_interval":"60","ping_shift":"0"},
"40":{"id":"40","uid":"4","title":"www.sukar.com","url":"www.sukar.com","ip":"72.52.8.195","enabled":"1","services":{"Ftp":{"status":"0","ts":"1355058092"},"Http 1":{"status":"1","ts":"1355058092"}},"fetch_interval":"60","ping_shift":"0"}}
as you can see the keys are numbers (27, 30, 31,...) and are not consecutive. How can I get the data from such json? I know that it must be some kind of loop depending on length but I couldn't figure it out on how to do so. Usually I'd use jObject.getString("id"), but since I don't know what the string would be what can I do?

If you have a JSONObject as the root, you should be able to do the following:
JSONObject root = new JSONObject(jsonString);
JSONArray names = root.names();
for(int i = 0; i < names.length(); i++) {
String tag = names.getString(i);
...
}
The tag will be the numeric tag you refer to.

JSONObject questionMark = new JSONObject(jsonString);
Iterator keys = questionMark.keys();
while(keys.hasNext()) {
// loop to get the dynamic key
String currentDynamicKey = (String)keys.next();
// get the value of the dynamic key
JSONObject currentDynamicValue = questionMark.getJSONObject(currentDynamicKey);

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