You can deal with this attribute in this way -

inputStream = XMLtoJsonConverter.class.getClassLoader().getResourceAsStream("simple.xml");
String xml = IOUtils.toString(inputStream);
System.out.println(org.json.XML.toJSONObject(xml).toString(4));

If you want to go into depth of xml to json serialization look at this. while using this, you just want to create a pojo classes of xml structure nothing more than that.

Take a look at below code -

JacksonDeserializer.java -

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import java.io.IOException;
import java.net.URL;
import java.util.List;


public class JacksonDeserializer {

    private List<Item> item;
    private XmlMapper xmlMapper = null;
    private SimpleModule module = null;
    private Channel ch = null;

    public List<Item> getItem() {
        return item;
    }

    public void setItem(List<Item> item) {
        this.item = item;
    }

    public void readXML() throws IOException {
        xmlMapper = new XmlMapper();
        module = new SimpleModule();
        ch = new Channel();
        module.addDeserializer(List.class, ch.new ChannelDeserializer());
        xmlMapper.registerModule(module);
        xmlMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        URL url = new URL("some xml data available on url");
        Rss rss = xmlMapper.readValue(url, Rss.class);//you can provide xml file also
        Channel channel = rss.getChannel();
        JacksonDeserializer obj = new JacksonDeserializer();
        item = channel.getItem();
        obj.setItem(item);
    }
}

Rss.java -

public class Rss {

    private Channel channel;

    public Rss() {
    }

    public Channel getChannel() {
        return channel;
    }

    public void setChannel(Channel channel) {
        this.channel = channel;
    }
}

Channel.java -

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class Channel {

    private List<Item> item = new ArrayList();

    public Channel() {
    }

    public List<Item> getItem() {
        return item;
    }

    public void setItem(List<Item> item) {
        this.item = item;
    }

    public class ChannelDeserializer extends JsonDeserializer<List<Item>> {

        @Override
        public List<Item> deserialize(JsonParser jp, DeserializationContext arg1) throws IOException, JsonProcessingException {
            JsonNode jsonNode = jp.getCodec().readTree(jp);

            String title = jsonNode.get("title").asText();
            String link = jsonNode.get("link").asText();
            String description = jsonNode.get("description").asText();
            String pubDate = jsonNode.get("pubDate").asText();
            String source = jsonNode.get("source").path("").asText();
            Item i = new Item(title, link, description, pubDate, source);
            item.add(i);
            return item;
        }
    }
}

Item.java -

public class Item {

    private String title;
    private String link;
    private String description;
    private String pubDate;
    private String source;

    public Item() {
    }

    public Item(String title, String link, String description, String pubDate, String source) {
        this.title = title;
        this.link = link;
        this.description = description;
        this.pubDate = pubDate;
        this.source = source;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getLink() {
        return link;
    }

    public void setLink(String link) {
        this.link = link;
    }

    public String getSource() {
        return source;
    }

    public void setSource(String source) {
        this.source = source;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getPubDate() {
        return pubDate;
    }

    public void setPubDate(String pubDate) {
        this.pubDate = pubDate;
    }
}

Perhaps:

{
  "folders": [
    { "id":123, "private":0, "archived":0, "order":1, "title":"Shopping" },
    ...
  ]
}

Because there is not an exact correspondence between XML and JSON, you are free (e.g. have to define) how the two data-structures map. For instance, in the above, the "folder" element is implicit in the nested objects in the "folders" array.

This could be expanded as in:

"folders": [{"folder": { .... }]

Etc, but there is still the problem of not being able to capture content+attributes as consistently as XML. In any case, your data-structure -> JSON|XML serializer likely works in a particular way (and please, please, use a library, not "hand-rolled" JSON-string-munging). That is; the format of the XML and JSON should be uniformly dictated (somehow) by the data-structure for transmission.

JSON in Java has some great resources.

Maven dependency:

<dependency>
  <groupId>org.json</groupId>
  <artifactId>json</artifactId>
  <version>20180813</version>
</dependency>

XML.java is the class you're looking for:

import org.json.JSONObject;
import org.json.XML;
import org.json.JSONException;

public class Main {

    public static int PRETTY_PRINT_INDENT_FACTOR = 4;
    public static String TEST_XML_STRING =
        "<?xml version=\"1.0\" ?><test attrib=\"moretest\">Turn this to JSON</test>";

    public static void main(String[] args) {
        try {
            JSONObject xmlJSONObj = XML.toJSONObject(TEST_XML_STRING);
            String jsonPrettyPrintString = xmlJSONObj.toString(PRETTY_PRINT_INDENT_FACTOR);
            System.out.println(jsonPrettyPrintString);
        } catch (JSONException je) {
            System.out.println(je.toString());
        }
    }
}

Output is:

{"test": {
    "attrib": "moretest",
    "content": "Turn this to JSON"
}}