Display properties file elements as a json array

Question

I want to display what I have the properties file as a json array: Here's my java code:

props.setProperty("Info1", "stack1");
props.setProperty("Info2", "stack2");

What I got in properties file:

 Info1=stack1
 Info2=stack2

Here's what want to get

var Obj =  {}
Obj.dataset= [{ "Info1":"stack1" },{ "Info2"="stack2"}];

I tried with Gson and JsonObject but in vain. What should I do please? It's not a duplicate question because I am using properties class and the suggested answers that I have already tried didn't work.

Try with a map: stackoverflow.com/questions/12155800/…

Boris Pavlović
– Boris Pavlović

2016-06-29 13:30:14 +00:00
Commented Jun 29, 2016 at 13:30 — Boris Pavlović
– Boris Pavlović, Commented Jun 29, 2016 at 13:30

Radouane ROUFID · Accepted Answer · 2016-06-29 13:34:37Z

3

You can loop over properties and add the key/value to a Json Array as below:

Properties props = new Properties();
props.setProperty("Info1", "stack1");
props.setProperty("Info2", "stack2");

Enumeration e = props.propertyNames();
JsonArray  jsonArray = new JSONArray();

while(e.hasMoreElements()) {
    String key = (String) e.nextElement();
    String value = props.getProperty(key);

    JSONObject jsonObject = new JSONObject();
    jsonObject.put(key, value);

    jsonArray.add(jsonObject);
}

System.out.println(jsonArray.toString());

answered Jun 29, 2016 at 13:34

Radouane ROUFID

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Comments

Nicolas Filotto · Accepted Answer · 2016-06-29 13:30:37Z

1

It can be done with jackson and its ObjectMapper like this:

Properties props = new Properties();
props.setProperty("Info1", "stack1");
props.setProperty("Info2", "stack2");

ObjectMapper mapper = new ObjectMapper();
StringWriter writer = new StringWriter();
mapper.writeValue(writer, props);
System.out.println(writer.toString());

Output:

{"Info2":"stack2","Info1":"stack1"}

Here is a good tutorial about Jackson.

answered Jun 29, 2016 at 13:30

Nicolas Filotto

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Comments

Luciano · Accepted Answer · 2020-11-04 16:31:49Z

1

You can also use the following:

    Properties props = new Properties();
    props.setProperty("Info1", "stack1");
    props.setProperty("Info2", "stack2");
    JSONArray array = new JSONArray();
    Map map = new HashMap();

    Iterator iter = props.keySet().iterator();

    while (iter.hasNext()) {
        String key = (String) iter.next();
        String value = props.getProperty(key);
        map.put(key, value);
    }

    array.put(map);
    for (int i = 0; i < array.length(); i++) {
        JSONObject obj = (JSONObject) array.get(i);
        System.out.println(obj.toString());
    }

edited Nov 4, 2020 at 16:31

Luciano

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answered Jun 29, 2016 at 13:46

rootExplorr

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