How to convert json String with Square brackets to List?

Question

I have the following string : ["LankaBell","BillDesk"]

How can i convert it to Java List Object using using json-lib-2.2.3-jdk15.jar\net\sf\json library ?

EDIT : If not possible using this library then solution using other libraries is also appreciated.

what is the reason to convert only with that lib? why not use String methods ? Also show us your efforts — sanbhat, Aug 12 '13 at 14:46
Follow this link: It is helpful http://stackoverflow.com/questions/5015844/parsing-json-object-in-java — Master, Aug 12 '13 at 14:52
@sanbhat In my product introducing new library is not that much easy. — Prateek, Aug 12 '13 at 14:54
Follow this link: It is helpful http://stackoverflow.com/questions/5015844/parsing-json-object-in-java — Master, Aug 12 '13 at 14:55
@MasterJ Thanks dear, but is it possible using the mention jar in my question or i have to switch to org.json — Prateek, Aug 12 '13 at 14:57
I do not know about it. But I use jackson-core-asl-1.8.5.jar — Master, Aug 12 '13 at 15:00

Yurii Shylov · Accepted Answer · 2013-08-12T15:06:46.557

5

Using the json-lib:

String source = "[\"LankaBell\",\"BillDesk\"]";
List<String> list = new ArrayList<>();
list = JSONArray.toList(JSONArray.fromObject(source), new Object(), new JsonConfig());

(Actually you can use just JSONArray.toList(JSONArray.fromObject(source)) but it is deprecated)

Another non-deprecated solution:

list = (List<String>) JSONArray.toCollection(JSONArray.fromObject(source))

edited Aug 12 '13 at 15:06

answered Aug 12 '13 at 15:01

Yurii Shylov

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Thanks it works for me using the same library(net.sf.json..). i use this approach : list = (List) JSONArray.toCollection(JSONArray.fromObject(source)) – Prateek Aug 13 '13 at 05:06
Thanks Shylov. It worked. – Feb 04 '16 at 15:01

score 2 · Answer 2 · answered Aug 12 '13 at 15:04

2

I highly recommend using Jackson instead of json-lib.

List<String> list = new org.codehaus.jackson.map.ObjectMapper().readValue("[\"LankaBell\",\"BillDesk\"]", List.class);

answered Aug 12 '13 at 15:04

superEb

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I +1'd you, but you should really use the example with a generic Type for this. You are not guaranteed to get a List with your example! – Tom Carchrae Aug 12 '13 at 15:16
Good point, @TomCarchrae. I assumed it would be safe enough for the array in question though. Obviously my code is not ideal (e.g. `ObjectMapper` should probably be reused, checked exceptions need to be handled, using parameterized type with casting issues might not be desirable vs using raw type, value to be deserialized would probably be a variable, etc), but it's a quick snippet of how easy it is to use Jackson. – superEb Aug 12 '13 at 15:32

score 2 · Answer 3 · answered Aug 12 '13 at 15:10

2

String input = "[\"LankaBell\",\"BillDesk\"]";

// net.sf.json.JSONArray
JSONArray jsonArray = JSONArray.fromObject(input);

List<String> list = new ArrayList<String>();

for (Object o : jsonArray) {
    list.add((String) o);
}

log.debug(list);

answered Aug 12 '13 at 15:10

daveloyall

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@Yurii Shylov put more work into [his answer](http://stackoverflow.com/questions/18190001/how-to-convert-json-string-with-square-brackets-to-list/18190569#answer-18190382); his answer is superior. – daveloyall Aug 12 '13 at 15:13
Thanks daveloyall for redirecting to Yurii solution;+1 for your honesty – Prateek Aug 13 '13 at 05:08

score 0 · Answer 4 · answered Aug 12 '13 at 14:51

0

    String string = "[\"LankaBell\",\"BillDesk\"]";

    //Remove square brackets
    string = string.substring(1, string.length()-1);

    //Remove qutation marks
    string.replaceAll("\"", "");

    //turn into array
    String[] array = string.split(",");

    //Turn into list
    List<String> list = Arrays.asList(array);

    System.out.println(list);

answered Aug 12 '13 at 14:51

Brinnis

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How about `String string = "[\"LankaBell\",\"BillDesk\", \"one, two\"]";`? – dantuch Aug 12 '13 at 15:11

score 0 · Answer 5 · answered Aug 12 '13 at 14:53

0

Object[] objs = "[\"Lankabell\", \"BillDesk\"]".replaceAll("\\[|\\]|\"","").split(",");

answered Aug 12 '13 at 14:53

merfanzo

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How to convert json String with Square brackets to List?

5 Answers5