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")
Related
I have a REST response, which contains text and JSON value. I need to get uniqueId from JSON value, what will be the best way?
My JSON is very big, but looks like this:
paymentResponse = Published your custom Transaction json to topic env_txn_endtoend_01 Final json: {"txnId":null, "envelope":{"uniqueId":234234_2344432_23442","rootID":"34534554534" etc...}}
How can I get this uniqueId value = 234234_2344432_23442?
There are many libraries to help with Json Serialization and Deserialization. Jackson Object Mapper is one of the most popular ones.
The code would be something like this. To begin with you would need Java Pojo which represents your json Object e.g. let's consider this example from this tutorial, where you can create a Car Java Object from a Car json string.
ObjectMapper objectMapper = new ObjectMapper();
String json = "{ \"color\" : \"Black\", \"type\" : \"BMW\" }";
Car car = objectMapper.readValue(json, Car.class); // you should have a Car Class(Pojo) with color, and type attributes
Final json: {"txnId":null,
"envelope":{"uniqueId":234234_2344432_23442","rootID":"34534554534"
etc...}}
How can i get this uniqueId value = 234234_2344432_23442
You could do something like this:
import groovy.json.JsonSlurper
...
String jsonString = '{"txnId":null, "envelope":{"uniqueId":"234234_2344432_23442","rootID":"34534554534"}}'
def slurper = new JsonSlurper()
def json = slurper.parseText(jsonString)
def envelope = json.envelope
String rootId = envelope.rootID
assert rootId == '34534554534'
String uniqueId = envelope.uniqueId
assert uniqueId == '234234_2344432_23442'
I have a JSON object as follows:
{
"token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9",
"user":{
"pk":17,
"username":"user1",
"email":"user1#gmail.com",
"first_name":"",
"last_name":""
}
}
I am trying to get two JSON object from it; token and user. I have tried two different ways but both are failing:
//response.body().string() is the above json object
JSONArray jsonArray = new JSONArray(response.body().string());
jsonObjectRoot = new JSONObject(response.body().string());
Could any one please let me know how I could split this to two JSON objects?
You can split it this way:
// source object
JSONObject sourceObject = new JSONObject(sourceJson);
String tokenKey = "token";
// create new object for token
JSONObject tokenObject = new JSONObject();
// transplant token to new object
tokenObject.append(tokenKey, sourceObject.remove(tokenKey));
// if append method does not exist use put
// tokenObject.put(tokenKey, sourceObject.remove(tokenKey));
System.out.println("Token object => " + tokenObject);
System.out.println("User object => " + sourceObject);
Above code prints:
Token object => {"token":["eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9"]}
User object => {"user":{"last_name":"","pk":17,"first_name":"","email":"user1#gmail.com","username":"user1"}}
You can parse a json string with
var obj = JSON.parse(jsonString);
You can filter sub parts of a json object by simply addressing them
var token = obj.token;
var user = obj.user;
The safer / cleaner way to do it is to create a POJO and deserialize your JSON into it using Jackson. Your pojo:
public class MyObject {
String token;
User user;
static class User {
int pk;
String username;
String email;
String first_name;
String last_name;
}
}
Then, when you want to deserialize:
import com.fasterxml.jackson.databind.ObjectMapper;
and
ObjectMapper mapper = new ObjectMapper();
MyObject myObject = mapper.readValue(jsonString, MyObject.class);
String token = myObject.token;
User user = myObject.user;
...
I recently faced the same situation, I used the below code which worked for me:
JSONObject jo1 = new JSONObject(output);
JSONObject tokenObject = new JSONObject();
tokenObject.put("token", jo1.get("token"));
JSONObject userObject = new JSONObject();
userObject.put("user", jo1.get("user"));
Here I am creating a new empty JSONObject and then put the retrieved object from the original object in the newly created JSONObject.
You can also verify the output by just sysout:
System.out.println("token:" + tokenObject.get("token"));
System.out.println("user:" + userObject.get("user"));
Output in my case :
token::eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9
user:{"last_name":"","pk":17,"first_name":"","email":"user1#gmail.com","username":"user1"}
Yep. It is a JSON string.
Using like this
JSONParser jparse=new JSONParser();
JSONObject jObj=(JSONObject)jParse.parse(jsonString);
jObj will contain json Object now.
So I have some code that is able to send this out:
{"id":1,
"method":"addWaypoint",
"jsonrpc":"2.0",
"params":[
{
"lon":2,
"name":"name",
"lat":1,
"ele":3
}
]
}
The server receives this JSON object as a string named "clientstring":
JSONObject obj = new JSONObject(clientstring); //Make string a JSONObject
String method = obj.getString("method"); //Pulls out the corresponding method
Now, I want to be able to get the "params" value of {"lon":2,"name":"name","lat":1,"ele":3} just like how I got the "method".
however both of these have given me exceptions:
String params = obj.getString("params");
and
JSONObject params = obj.getJSONObject("params");
I'm really at a loss how I can store and use {"lon":2,"name":"name","lat":1,"ele":3} without getting an exception, it's legal JSON yet it can't be stored as an JSONObject? I dont understand.
Any help is VERY appreciated, thanks!
params in your case is not a JSONObject, but it is a JSONArray.
So all you need to do is first fetch the JSONArray and then fetch the first element of that array as the JSONObject.
JSONObject obj = new JSONObject(clientstring);
JSONArray params = obj.getJsonArray("params");
JSONObject param1 = params.getJsonObject(0);
How try like that
JSONObject obj = new JSONObject(clientstring);
JSONArray paramsArr = obj.getJSONArray("params");
JSONObject param1 = paramsArr.getJSONObject(0);
//now get required values by key
System.out.println(param1.getInt("lon"));
System.out.println(param1.getString("name"));
System.out.println(param1.getInt("lat"));
System.out.println(param1.getInt("ele"));
Here "params" is not an object but an array. So you have to parse using:
JSONArray jsondata = obj.getJSONArray("params");
for (int j = 0; j < jsondata.length(); j++) {
JSONObject obj1 = jsondata.getJSONObject(j);
String longitude = obj1.getString("lon");
String name = obj1.getString("name");
String latitude = obj1.getString("lat");
String element = obj1.getString("ele");
}
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"}]
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;