Parse JSON to map with array

Question

Here is a sample json:

{"LIST_OF_IDS_FOR_RETRANSFER":["50, 39, 29"]}

Now I'm trying to parse this json to map with no luck:

Map<String, List<Integer>> params = new ObjectMapper().readValue(jsonString, new TypeReference<Map<String, List<Integer>>>(){});

The result is the Map with one entry:

key: LIST_OF_IDS_FOR_RETRANSFER

value: List with size=1, value is '50, 39, 29'.

But I want to get List with size=3. Is it possible to achieve with Jackson?

Well you are quite literally trying to parse an array consisting of a single string "50, 39, 29". Did you mean: {"LIST_OF_IDS_FOR_RETRANSFER":[50, 39, 29]}? If not, you can simply split the LIST_OF_IDS_FOR_RETRANSFER on , to extract the ids. — nbokmans
– nbokmans, Commented May 4, 2018 at 15:12

Babajide M. Moibi · Accepted Answer · 2018-05-04 15:15:11Z

2

Since your type reference is Map<String, List<Integer>>, then your JSON should look like this: {"LIST_OF_IDS_FOR_RETRANSFER":[50, 39, 29]} (remove the "" around the numbers).

answered May 4, 2018 at 15:15

Babajide M. Moibi

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