convert json string to java string array

Question

I am getting a json string as ["A","B","C","D","E"] in serlvet controller.

I want to convert this string into a Java string array. The Json string also includes [].

output should be a Java String array:

arr[0] = A
arr[1] = B

and so on. Could you please suggest a parsing solution?

baao · Accepted Answer · 2017-08-23 12:06:48Z

3

Using a stream you could convert it like so:

String s = "[\"A\",\"B\",\"C\",\"D\",\"E\"]";
String[] arr = Arrays.stream(s.substring(1, s.length()-1).split(","))
                .map(e -> e.replaceAll("\"", ""))
                .toArray(String[]::new);

You could also use a JSON library (which might be the prefered way). For example using Jackson:

String s = "[\"A\",\"B\",\"C\",\"D\",\"E\"]";
ObjectMapper mapper = new ObjectMapper();
String[] arr = mapper.readValue(s, String[].class);

edited Aug 23, 2017 at 12:06

answered Aug 23, 2017 at 10:35

baao

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2 Comments

jannis Over a year ago

Parsing JSON on your is risky in terms of security (especially in a web environment). Just use one of the well-known JSON libraries as GSON, Jackson, etc.

baao Over a year ago

Right @jannis, added an example with jackson

Jay · Accepted Answer · 2017-08-23 11:31:44Z

0

ArrayList<String> jsonStringToArray(String jsonString) throws JSONException {

    ArrayList<String> stringArray = new ArrayList<String>();

    JSONArray jsonArray = new JSONArray(jsonString);

    for (int i = 0; i < jsonArray.length(); i++) {
        stringArray.add(jsonArray.getString(i));
    }

    return stringArray;
}

answered Aug 23, 2017 at 11:31

Jay

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