Parsing JSON Response in java to extract values

Question

What I'm trying to do is get a response, but don't know how to extract the values from it.

The actual response is the following:

[
   "SUCCESS",
   [   [
      "Karachi",
      ["کراچی"],
      [],
            {
         "candidate_type": [0],
         "is_confident": [true]
      }
   ]]
]

I need to extract urdu text from it

    String text = "Karachi";            
    String url = "https://inputtools.google.com/request";       
    try {           
         final HttpClient client = new HttpClient();
            final PostMethod method = new PostMethod(url);
            method.setParameter("text", text);
            method.setParameter("itc", "ur-t-i0-und");
            method.setParameter("num", "1");
            method.setParameter("cp", "0");
            method.setParameter("cs", "1");
            method.setParameter("ie", "utf-8");     
            client.executeMethod(method);               
            BufferedReader strResponse =  new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(),"UTF-8"));
            Object jObj =   (Object) JSON.parse(strResponse);

Are you saying you need to extract the value for some key urdu? I'm asking because that would be impossible based on the JSON you've posted (as there is no urdu anywhere). — Mike
– Mike, Commented Dec 26, 2015 at 18:15
no i want to extract ["کراچی"] this value... i am asking about urdu text — user1162546
– user1162546, Commented Dec 26, 2015 at 18:16

ikken · Accepted Answer · 2015-12-26 19:01:35Z

1

Try this (Your buffer reader may have more than one line):

StringBuilder yourJsonString= new StringBuilder();
String line;
while ((line = strResponse.readLine()) != null) {
      yourJsonString.append(line);
}
JSONArray jsonObject = new JSONArray(yourJsonString.toString());
//retrieve the second element of json array
JSONArray secondElmArray= jsonObject.getJSONArray(1);
JSONArray innerArray = secondElmArray.getJSONArray(0);

JSONArray urduList= innerArray.getJSONArray(1);
String urduWord= urduList.getString(0);

edited Dec 26, 2015 at 19:01

answered Dec 26, 2015 at 18:24

ikken

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2 Comments

user1162546 Over a year ago

can u plz tell me how to parse the above BufferRader string into JsonString.

user1162546 Over a year ago

["SUCCESS",[["Karachi", ["کراچی"],[],{"candidate_type":[0],"is_confident":[true]}]]] this response i am getting but i only need to extract ["کراچی"] from it the code you send i have tried it but i am getting Karachi but i need ["کراچی"] this value

Ankit Gupta · Accepted Answer · 2018-07-05 07:44:26Z

I created a wrapper that works fine for all Jsons:

package com.myProject.SampleProject;

import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.json.JSONObject;


/**
* These two dependences will require to use the code
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20160212</version>
</dependency>
*/
public class JsonExtractor {

public static void main(String[] args) {


        String json = "{\r\n" + 
                "  \"releases\": [\r\n" + 
                "    {\r\n" + 
                "      \"release_key\": \"e99e39b\",\r\n" + 
                "      \"ship_advice_no\": \"313456\",\r\n" + 
                "      \"source_node_id\": \"1\",\r\n" + 
                "      \"source_node_type\": \"\",\r\n" + 
                "      \"level_of_service\": \"\",\r\n" + 
                "      \"fulfillment_quantities\": [\r\n" + 
                "        {\r\n" + 
                "          \"fulfillment_key\": null,\r\n" + 
                "          \"order_line_key\": \"201807\",\r\n" + 
                "          \"order_line_quantity\": \"1.0\"\r\n" + 
                "        }\r\n" + 
                "      ]\r\n" + 
                "    },\r\n" + 
                "    {\r\n" + 
                "      \"release_key\": \"e9b4f604\",\r\n" + 
                "      \"ship_advice_no\": \"3193457\",\r\n" + 
                "      \"source_node_id\": \"\",\r\n" + 
                "      \"source_node_type\": \"\",\r\n" + 
                "      \"level_of_service\": \"\",\r\n" + 
                "      \"fulfillment_quantities\": [\r\n" + 
                "        {\r\n" + 
                "          \"fulfillment_key\": null,\r\n" + 
                "          \"order_line_key\": \"2018070\",\r\n" + 
                "          \"order_line_quantity\": \"1.0\"\r\n" + 
                "        }\r\n" + 
                "      ]\r\n" + 
                "    }\r\n" + 
                "  ]\r\n" + 
                "}";
        String print = getvalueThroughUrl(json, "/releases/[0]/release_key");
        System.out.println(print);
        print = getvalueThroughUrl(json, "/releases/[0]/fulfillment_quantities/[0]/order_line_quantity");
        System.out.println(print);
        print = getvalueThroughUrl(json, "/releases/[0]/ship_advice_no");
        System.out.println(print);
        print = getvalueThroughUrl(json, "/releases/[1]/fulfillment_quantities/[0]/order_line_key");
        System.out.println(print);
        print = getvalueThroughUrl(json, "/releases/[1]/release_key");

    }


    private static String[] getXpathOrder(String url) {
        String[] xpathOrder =  null;
        if(url.contains("&")) {
            xpathOrder = url.split("&");
        }
        else {
        xpathOrder = url.split("/");
        }
        return xpathOrder;
    }


    public static String getvalueThroughUrl(String json, String url) {
        String value = "";
        String[] xpathOrder =  getXpathOrder(url);
        JsonNode rootNode = null;
        String key = "";
        try {
        ObjectMapper objectMapper = new ObjectMapper();
        JSONObject jsonObject = new JSONObject(json);
        byte[] jsonData = jsonObject.toString().getBytes();
//      JsonNode rootNode = objectMapper.readTree(jsonData);
//      rootNode = objectMapper.readTree(jsonData);
        rootNode = objectMapper.readTree(jsonObject.toString());
        }catch(Exception e) {
            e.printStackTrace();
        }
        try {
        JsonNode node = null;
        for(int i=1;i<xpathOrder.length;i++) {
            if(node==null)
                node = rootNode;
            if(xpathOrder[i].contains("[")){
                xpathOrder[i] = xpathOrder[i].replace("[", "");
                xpathOrder[i] = xpathOrder[i].replace("]", "");
                node = node.get(Integer.parseInt(xpathOrder[i]));
            }
            else
                node = node.path(xpathOrder[i]);
                key = xpathOrder[i];
        }
        value = node.asText();
        }catch(Exception e) {
            e.printStackTrace();
        }
        System.out.println("API key: "+key+" value is:"+value);
        return value;
    }


}

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