CODEWITHSUNDEEP
javaarraysjsondictionary
CC2079
CC2079

Reputation: 1

Merge two Arrays as JSON

I have two arrays, 

Array 1 = [ a, b, c, d]
Array 2 = [ 1, 2, 3, 4]

I need to merge them like a dictionary/map (Array 1 is Keys and Array 2 is values) and convert that to JSON.

Below is the converted dictionary/map to JSON and final wanted result. 

{"a":"1", "b":"2", "c":"3", "d":"4"}

Upvotes: 0

Views: 2030

Answers (7)

javiticu
javiticu

Reputation: 1

org.json has a simple way to do it.

JSONArray keys = new JSONArray(Arrays.asList(array1));
JSONArray values = new JSONArray(Arrays.asList(array2));

JSONObject result = values.toJSONObject(keys);

Upvotes: 0

CC2079
CC2079

Reputation: 1

Thanks for all input special thanks to Pshemo. My working code:

import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.codehaus.jackson.JsonGenerationException;

import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;


public class ArrayToJason  {

    public static void main (String args[]) throws Exception{

        String [] value = {"a", "b" , "c", "d"};
        String [] key = {"aa", "bb", "cc", "dd"};

         Map <String, String> map1 = new HashMap();

            Iterator <String> keys = Arrays.asList(value).iterator();
            Iterator <String> values = Arrays.asList(key).iterator();

            while (keys.hasNext() && values.hasNext()) {
                map1.put(keys.next(), values.next());
            }

            ObjectMapper mapper = new ObjectMapper();
            try {
                String result = mapper.writeValueAsString(map1);

                System.out.println("Jason format " + result);

            }catch (JsonGenerationException e) {

                e.printStackTrace();


    }
}
}

**Jason format {"d":"dd","b":"bb","c":"cc","a":"aa"}

Upvotes: 0

vtor
vtor

Reputation: 9309

You can use jackson , and just merge given lists into Map

    Map<String, String> map = new HashMap<>();

    Iterator<String> keys = Arrays.asList("a","b").iterator();
    Iterator<String> values = Arrays.asList("aa", "bb").iterator();

    while (keys.hasNext() && values.hasNext()) {
        map.put(keys.next(), values.next());
    }

    ObjectMapper mapper = new ObjectMapper();

    String result = mapper.writeValueAsString(map);

Upvotes: 0

Pshemo
Pshemo

Reputation: 124215

It looks like you don't want to actually merge two arrays into one, but you want to create JSON object where its keys are stored in first array, and value in second array. In that case you can use org.json.JSONObject.

Here is simple example:

String[] keys = {"a",  "b",  "c",  "d"};
String[] values = {"aa", "bb", "cc", "dd"};

JSONObject jsonObject = new JSONObject();

for (int i = 0; i<keys.length; i++){
    jsonObject.put(keys[i], values[i]);
}

System.out.println(jsonObject);

Output {"a":"aa","b":"bb","c":"cc","d":"dd"}

Upvotes: 1

nunofmendes
nunofmendes

Reputation: 3791

As an example of a simple code.

If you have two arrays, lets say Array A and B, just iterate them and create a JSONObject of them, where array A is the keys and array B is the values.

Basic code example:

JSONObject map = new JSONObject()
for(int i =0; i<array.size(); i++) {
  map.put(arrayA.[i],arrayB[i]);
}
return map;

Upvotes: 2

Kalinovcic
Kalinovcic

Reputation: 568

I assume you want the following:

StringBuilder builder = new StringBuilder();
for (int i = 0; i < array1.length; i++)
{
    builder.append("\"");
    builder.append(array1[i]);
    builder.append("\":\"");
    builder.append(array2[i]);
    builder.append("\"");
    if (i < (array1.length - 1))
        builder.append(", ");
}
String result = builder.toString();

Upvotes: -1

Developus
Developus

Reputation: 1462

The simplest way to convert array into JSON is:

JSONArray jsonArray = new JSONArray(Arrays.asList(myArray));

Upvotes: -1

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