How to capture the http response as a Json Object in Java

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I want to send a HTTP request using CloseableHttpClient and then capture the body of the response in a JSON object so I can access the key values like this: responseJson.name etc

I can capture the response body as a string ok using the code below but how can I capture it as a JSON object?

CloseableHttpClient httpClient = HttpClients.createDefault();
URIBuilder builder = new URIBuilder();

    builder.setScheme("https").setHost("login.xxxxxx").setPath("/x/oauth2/token");
    URI uri = builder.build();
    HttpPost request = new HttpPost(uri);
    HttpEntity entity = MultipartEntityBuilder.create()
            .addPart("grant_type", grantType)
            .build();
    request.setEntity(entity);
    HttpResponse response = httpClient.execute(request);
    assertEquals(200, response.getStatusLine().getStatusCode());

    //This captures and prints the response as a string
    HttpEntity responseBodyentity = response.getEntity();
    String responseBodyString = EntityUtils.toString(responseBodyentity);
    System.out.println(responseBodyString);

you can type cast your response string to JSON Object.

String to JSON using Jackson with com.fasterxml.jackson.databind:

Assuming your json-string represents as this: jsonString = "{"name":"sample"}"

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

ObjectMapper mapper = new ObjectMapper();
JsonNode node = mapper.readTree(responseBodyString);
String phoneType = node.get("name").asText();

Using org.json library:

JSONObject jsonObj = new JSONObject(responseBodyString);
String name = jsonObj.get("name");

JAVA- Send HTTP Get/Post Request and Read JSON response , JAVA- Send HTTP Get/Post Request and Read JSON response JSONObject; public class Send_HTTP_Request2 { public static void main(String[] args) { try { Send_HTTP_Request2.call_me(); } catch (Exception e) { e. It helps us to read the body of the response. Subsequently, in this process of deserialization, we will Convert JSON Response Body to Java Objects. It is also known as Object Representation of JSON responses. Additionally, to learn more about the deserialization of JSON response, we will recommend you to go through the Deserialize JSON Response.

Just convert the string into JSONObject then get the value for name

JSONObject obj = new JSONObject(responseBodyString);
System.out.println(obj.get("name"));

How to Parse JSON Data From a REST API Using a Simple JSON , How to Parse JSON Data From a REST API Using a Simple JSON Library. Step 1) Pass the desired URL as an object: Step 2) Type cast the URL object into a HttpURLConnection object. Step 5) Get the corresponding response code. This tutorial shows how to send HTTP Get Request using java and Read JSON response. To read json Response you will have to add java-jason.jar to class path. Send HTTP Get Request with Parameters.

What I would recommend is since you already have your JSON as a string, write a method which makes use of the google 'Splitter' object and define the characters on which you want to split into K-V pairs.

For example I did the same for K-V pairs as a string coming from a Spring Boot app and split based on the special ',' characters:

private Map<String, String> splitToMap(String in) {

    return Splitter.on(", ").withKeyValueSeparator("=").split(in);
}

replace with for example ": " and this should pick up your JSON string as K-V pairs.

Splitter Mvn dependency below:

<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>21.0</version>
</dependency>

hope this helps you make a start.

Java Code Examples for org.apache.http.HttpResponse, UTF_8.name())); return headerBaos.toByteArray(); } catch (IOException | HttpException e) { log.warn("Failed to unparse HttpResponse headers, due to {}", e); }� how to capture the response time, for example if i hit an end point…Postman we will get Time: 99 ms, can we do it same as in java please show some light on it. 0 Reply

Examples of calling an API HTTP GET for JSON in different , Downloading JSON via GET from a simple API should be the 2nd tutorial right after try { var data = JSON.parse(json); // data is available here: console.log( json); } catch (e) object-oriented programming language for the Java platform. uri = URI(url) response = Net::HTTP.get(uri) JSON.parse(response)� Deserialize Json Response. This tutorial will talk about a very interesting and helpful technique to read Body from a Response (Deserialize Json Response). This technique is called Deserialization of Response. Serialization and Deserialization are programming techniques where we convert Objects to Byte Streams and from Byte Streams back to Objects.

Java 11 HttpClient & Gson Tutorial: Send HTTP GET Requests and , HttpResponse package to work with response objects. We need to parse the JSON string as a Java object so we can work with it. Next, change the code in the try{} catch(){} block inside the main() method as follows:. In this API Testing tutorial, we take a look at how to parse JSON response and extract information using the REST-assured library. When testing an API, you typically make a request to a resource, (e.g. via a GET or POST request). The server comes back with a response and then you do some assertions on the response. How to Parse JSON Response

Response, Response.headers, object, Key-value pairs representing all HTTP headers sent by Parses the response body data as JSON and returns a JS object or array. JavaScript Object Notation (JSON) is a standard text-based format for representing structured data based on JavaScript object syntax. It is commonly used for transmitting data in web applications (e.g., sending some data from the server to the client, so it can be displayed on a web page, or vice versa).

Comments
  • What JSON library are you using?
  • Great thanks Sree. I used JSONObject from your 2nd example. I had to add this to my POM: <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20180813</version> </dependency>
  • Thanks Deadpool. I have tried this but it says cannot resolve symbol 'JSONObject'. I have a 'JsonObject' available from com.google.json but nothing is recognised for JSONObject. Do I have to install a JAR or add something to my POM to access this?
  • Ah found it now, I added this to my POM: <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20180813</version> </dependency>