Create JSON in 2D array to store key value pair

Question

I have a question that would like to seek your expertise on. I have Class call Technology and i retrieve data from the DB as object list of Technology classtechnologyList= getProjectBD().getAllTechnology();

my question is how to store data as key value pair in Json array. This is my code

JSONArray technologyArray=new JSONArray();
for (Technology technology : technologyList) {
        JSONArray gridRow=new JSONArray();
        gridRow.put(technology.getTechnologyId());
        gridRow.put(technology.getTechnologyName());            
        technologyArray.put(gridRow);           
    }

I need to pass this data to select option in my jsp as id and name. ex:-[1:JAVA,2:C#...]

Why not a JSONObject instead of JSONArray inside the loop?

Curcuma_
– Curcuma_

2015-10-21 09:50:20 +00:00
Commented Oct 21, 2015 at 9:50 — Curcuma_
– Curcuma_, Commented Oct 21, 2015 at 9:50
You show the correct way sir.Thanxx

SkyMicro
– SkyMicro

2015-10-21 09:59:20 +00:00
Commented Oct 21, 2015 at 9:59 — SkyMicro
– SkyMicro, Commented Oct 21, 2015 at 9:59

Maraboc · Accepted Answer · 2015-10-21 09:58:50Z

1

Try to use com.google.gson.* elements like that :

private JsonArray serializetechnologies(List<Technology> technologyList) {
    JsonArray jsonArray = new JsonArray();
    for (Technology technology : technologyList) {
        JsonObject jsonObject = new JsonObject();
        jsonObject.addProperty(technology.getTechnologyId()+"", technology.getTechnologyName());
        jsonArray.add(jsonObject);
    }
    return jsonArray;
}

And if you want to get value :

for (JsonElement jsonElement : jsonArray) {
    JsonObject jsonObject = (JsonObject) jsonElement;
    String name = jsonObject.get(technologyX.getTechnologyId() + "").getAsString();
    System.out.println("The name of technology witch Id = " + technologyX.getTechnologyId() + " is : "
            + name);
}

I hope that will help :)

edited Oct 21, 2015 at 9:58

answered Oct 21, 2015 at 9:51

Maraboc

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2 Comments

SkyMicro Over a year ago

I need to access value using js Sir

Maraboc Over a year ago

This link expalins the concept of JS and JSP very clearly.

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