how to parse multiple json objects with no name

Question

im having some trouble parsing json. I have json in the format of:

{"blah":"blah","blah":"blah"}
{"blah":"blah","blah":"blah"}
{"blah":"blah","blah":"blah"}

Here is the link to the JSON: http://gerrit.aokp.co/query?format=JSON&q=status:merged&age:1d

I cant make this a jsonobject and iterate over it. I currently have it as a string.

Is there a way to iterate over this? there will be over 500.

I tried making it an array by adding square brackets around it, but it didnt work because i needed to divide them with commas. I cant manipulate this by hand because im getting it from the web. So i tried this.

jsonString = jsonString.replaceAll("}(?!,)", "},");

the reason im adding the negative comma is that sometimes i might have a jsonobject inside of of these objects so I only want to add a comma in front of the '}' without commas.

when i do the replaceall i get this error.

Error in fetching or parsing JSON: java.util.regex.PatternSyntaxException: Syntax error in regexp pattern near index 1:
    }(?!,)
    ^

What am I doing wrong or is there an easier way to do this that im looking over?

EDIT: Oh yes, I need to implement this in java because this is in an android app.

I use org.codehaus.jettison.json.JSONObject and it works. Pass the string to the JSONObject constructor. The JSONObject class gives an Iterator of keys which you can use to get the values. — JHS
– JHS, Commented Aug 12, 2013 at 2:15

vince · Accepted Answer · 2013-08-12 03:06:34Z

here is an example how you can accomplish what you want using Jackson's ObjectMapper.

ObjectMapper om = new ObjectMapper();
try {
    List<Object> obj = om.readValue(yourJsonString, new TypeReference<List<Object>> () { });
} catch (IOException e1) {
    e1.printStackTrace();
}

Now you will have a list of each of the individual Objects in your JSON string. To take it a step further you could create a POJO for the Object you are parsing.

Something like:

public class MyObject{
    private String project;
    private String branch;
}

That is just an exmple, you would need to define a property for each json property.

Then you can turn :

List<Object> obj = om.readValue(yourJsonString, new TypeReference<List<Object>> () { });

Into

List<MyObject> obj = om.readValue(yourJsonString, new TypeReference<List<MyObject>> () { });

Hope this helps!

Ted Hopp · Accepted Answer · 2013-08-12 02:31:53Z

1

From the link you posted, it looks like there are newlines between objects (and only between objects). If that's right, I'd approach it like this:

String[] items = dataFromWeb.split("\n");
String asJSONArrayString = Arrays.toString(items);
JSONArray jsonArray = new JSONArray(asJSONArrayString);

This splits the data at newlines, then joins it together with commas between elements and brackets around the whole thing.

answered Aug 12, 2013 at 2:31

Ted Hopp

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2 Comments

Stephen C Over a year ago

This is probably the most practical approach. However, the best approach would be to get that Web API to return a well-formed JSON array of JSON objects.

Ted Hopp Over a year ago

@StephenC - I agree about getting the Web API to behave. If you ask for JSON, it should return valid JSON, not some garbage that looks vaguely like JSON but doesn't parse.

StrikerVillain · Accepted Answer · 2024-01-25 18:18:39Z

0

JSONObject jObject = null;
mJsonString = downloadFileFromInternet(urlString);
jObject = new JSONObject(mJsonString);

This will get you json object.

This is the way to get json array from json object:

JSONArray jsonImageArray = jObject.getJSONArray("your string");

edited Jan 25, 2024 at 18:18

StrikerVillain

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answered Aug 12, 2013 at 2:19

Sushil

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1 Comment

Vaibhav Aggarwal Over a year ago

Yes, I know about this, but i can't make an object out of this because there are multiple.

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