I have a StringBuilder:
My code is the following:
String response = sb.toString();
// logger.info("response is '{}' ", response);
JsonObject jsonObject = new JsonObject(response);
JsonObject fileStatuses = jsonObject.getJsonObject("FileStatuses");
JsonArray fileStatus = (JsonArray) fileStatuses.getJsonArray("FileStatus");
for (int i = 0; i < fileStatus.size(); ++i) {
JsonObject rec = fileStatus.getJsonObject(i);
String pathSuffix = rec.getString("pathSuffix");
logger.info(" the pathSuffix value is '{}' ", pathSuffix );
}
I want to use the javax.json.JsonObject and not org.json.JsonObject.
So, the problem is in new JsonObject(response); ==> Cannot instantiate the type JsonObject.
I know that org.json.JSONObject has a constructor that takes a String, but I think not the case when using javax.json.JsonObject.
How can I correct my code to make JsonObject jsonObject = new JsonObject(response) take a String and stay using javax.json.JsonObject class?
According to its API instead of using JsonObject jsonObject = new JsonObject(response); you can instantiate it from your response-String like this:
String response = sb.toString();
StringReader reader = new StringReader(response);
JsonReader jsonReader = Json.createReader(reader);
JsonObject jsonObject = jsonReader.readObject();
jsonReader.close();
im kinda new using JSON, and everything was fine until i have to make this JSON format.
"function":"ListarHoteles",
"parameters":[""]
Right now my code:
JSONObject JSONarr = new JSONObject();
JSONArray pam = new JSONArray();
jo.put("function", "ListarHoteles");
pam.add(" ");
JSONObject mainOBJ = new JSONObject();
mainOBJ.put("parameters", pam);
And im receiving:
{"{\"function\":\"ListarHoteles\"}":{},"parameters":[" "]}
Thank you
Is this what you want?
JSONObject jsonObject = new JSONObject();
jsonObject.put("function", "ListarHoteles");
JSONArray arr = new JSONArray();
arr.add("");
jsonObject.put("parameters", arr);
System.out.println(jsonObject.toString(2));
Output:
{
"function":"ListarHoteles",
"parameters":[
""
]
}
I am facing a problem to reach to an object which is inside an array of another object of another array. To make it simpler i am attaching the image (attached below), basically i want to reach to json object "0" inside jsonarray ticket itmes.
my codes are
JSONArray jsonArray = new JSONArray(buffer.toString());
JSONObject jsonobject = null;
jsonobject = jsonArray.getJSONObject(0);
JSONArray jsonarray1 = new JSONArray(buffer.toString());
jsonarray1 = jsonobject.getJSONArray("ticketitems");
JSONObject jsonobject1 = null;
TicketItem ticketItemList = new TicketItem();
jsonobject1 = jsonArray.getJSONObject(0);
ticketItemList.setItemCount(jsonobject1.getInt("itemCount"));
TicketItemList.add(ticketItemList);
However, jsonarray1 generates an exception stating
org.json.JSONException: No value for ticketitems
enter image description here
replace
jsonarray1 = jsonobject.getJSONArray("ticketitems");
with
jsonarray1 = jsonobject.getJSONArray("ticketItems");
It's case sensitive. It should be
jsonarray1 = jsonobject.getJSONArray("ticketItems");
I need to generate a JSON array object ("MainData") as shown below using Java. Can any one suggest to me how can be this done?
{
"MainData":{
"columnHeaderKeys":null,
"rowHeaders":[
{
"id":0001,
"name":abcd
},
{
"id":0002,
"name":xyz
}
],
"data":[
{
"id":0001,
"rowId":"R1",
"status":PASSED
},
{
"id":0002,
"rowId":"R2",
"status":PASSED
}
]
}
}
Using Google GSON, it's quite simple:
JSONObject result = new JSONObject();
result.put("columnHeadersKeys", JSONObject.NULL);
JSONArray headers = new JSONArray();
JSONObject obj = new JSONObject();
obj.put("id", 1);
obj.put("name", "abcd");
headers.put(obj);
obj = new JSONObject();
obj.put("id", 2);
obj.put("name", "xyz");
headers.put(obj);
result.put("rowHeaders", headers);
JSONArray data = new JSONArray();
obj = new JSONObject();
obj.put("id", 1);
obj.put("rowId", "R1");
obj.put("status", "PASSED");
data.put(obj);
obj = new JSONObject();
obj.put("id", 2);
obj.put("rowId", "R2");
obj.put("status", "PASSED");
data.put(obj);
result.put("data", data);
String output = result.toString();
Note that the entire creation of the object can be chained in one statement - however I find it easier to read when it's split out.
Use the Jackson library.
A sample code from the tutorial:
ObjectMapper mapper = new ObjectMapper();
Map<String,Object> userData = new HashMap<String,Object>();
Map<String,String> nameStruct = new HashMap<String,String>();
nameStruct.put("first", "Joe");
nameStruct.put("last", "Sixpack");
userData.put("name", nameStruct);
userData.put("gender", "MALE");
userData.put("verified", Boolean.FALSE);
userData.put("userImage", "Rm9vYmFyIQ==");
mapper.writeValue(new File("user-modified.json"), userData);
You can do like this It works perfectly for me with this line
Log.i("MainJSON", MainJSON.toString()); I have printed Created JSONObject
try{
JSONObject jo1=new JSONObject();
jo1.put("id",001);
jo1.put("name","abcd");
JSONObject jo2=new JSONObject();
jo2.put("id",002);
jo2.put("name","xyz");
JSONArray jarr1=new JSONArray();
jarr1.put(0, jo1);
jarr1.put(1, jo2);
JSONObject jo3=new JSONObject();
jo3.put("id",0001);
jo3.put("rowId","R1");
jo3.put("status","PASSED");
JSONObject jo4=new JSONObject();
jo4.put("id",0002);
jo4.put("rowId","R2");
jo4.put("status","PASSED");
JSONArray jarr2=new JSONArray();
jarr2.put(0, jo3);
jarr2.put(1, jo4);
JSONObject MainDataObj=new JSONObject();
MainDataObj.put("rowHeaders", jarr1);
MainDataObj.put("data", jarr2);
MainDataObj.put("columnHeaderKeys", "null");
JSONObject MainJSON=new JSONObject();
MainJSON.put("MainData", MainDataObj);
Log.i("MainJSON", MainJSON.toString());
}catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
Take a look here. You will find many projects that will help you.
I would try JSONObject.java from Crockford's JSON for Java Github repository.
Simple usage :
JSONObject obj = new JSONObject()
.put("MainData", new JSONObject()
.put("columnHeaderKeys", null)
.put("rowHeaders", new JSONArray()
.put(new JSONObject()
.put("id", "001")
.put("name", "abc")
)
.put(new JSONObject()
.put("id", "002")
.put("rowId", "R1")
// ...
)
);
Output string with :
String jsonString = obj.toString();
or write directly to file :
obj.write(new FileWriter(new File("/path/to/destination/file")));
here is my code..in android
String
result[{"Submitted_Date_Time":"12\/3\/2012","City":"","Issue_Category":"Graffity","OnProgress_Date_Time":"","id":"000000000000000","area":"SH 55","State":" ","Issue_Description":" ","Closed_Date_Time":"","imagepath":"android.graphics.Bitmap#40d55cd8","Latitude":"23.71","Longitude":"72.04","Issue_Status":"Closed","LandMark":" "}]
and i try to convert it in to json array and when i want to retrive json object from json array it gives me nullpointer exception...
JSONArray jarray = new JSONArray(result);
JSONObject jobj = jarray.getJSONObject(1);
plz help me.. thnkx in advance..
first your json String if it's contain "result" then it is not valid you can check it here http://jsonviewer.stack.hu/
to make valid json string just use String.replace as:
String finaljson=result.replace("result", "");
now JSON String is valid you can parse it as:
JSONArray jsonarray = new JSONArray(finaljson);
for (int i = 0 ; i < jarray.length() ; i++) {
JSONObject jsonobj = jarray.getJSONObject(i);
// get value from json object here
String str_City=jsonobj.getString("City");
///....
}
The Json array contains only one entry, the index is 0
JSONArray jarray = new JSONArray(result);
JSONObject jobj = jarray.getJSONObject(0);
To handle it right, access the json array using a for loop
JSONArray jarray = new JSONArray(result);
for (int i = 0 ; i < jarray.length() ; i++) {
JSONObject jobj = jarray.getJSONObject(i);
.....
}
Update your below code line it will solve your problem.
JSONObject jobj = jarray.getJSONObject(0);
or you can write below code instead of your above code line if object is more than one.
for(int i=0;i<jarray.length();i++){
JSONObject jobj = jarray.getJSONObject(i);
}