REST Assured Tutorial 65 – How to parse a JSON Object response to a Java Map in Rest Assured?
Introduction
As a part of the End to End REST Assured Tutorial, in this post, we will learn to parse a JSON Object response to a Java Map in Rest Assured.
It is not always necessary to convert the response to a POJO class instance to fetch values. We can cast or convert a JSON Object response into a Java Map directly. It is useful if you do not use Pojo classes.
Required Dependency
We are using the below version of Rest Assured:-
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<!-- https://mvnrepository.com/artifact/io.rest-assured/rest-assured --> <dependency> <groupId>io.rest-assured</groupId> <artifactId>rest-assured</artifactId> <version>4.3.3</version> <scope>test</scope> </dependency> |
Parse Json Object Response to Java Map
Once the response is returned and if it is a JSON object then we can parse them as a Map. There is a method called as() which takes a TypeRef reference to support classes with generics. For example – A JSON Object can be represented as a Map<String, Object>. To cast JSON Object response in such type we need to use as() method with TypeRef. TypeRef is an abstract class that is used to specify generic type information when de-serializing a response.
Example Program
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package RestAssuredConcepts; import java.util.Map; import io.restassured.RestAssured; import io.restassured.common.mapper.TypeRef; import io.restassured.http.ContentType; public class ParseJsonObjectResponseToMap { public static void main(String[] args) { Map<String,Object> responseBody = null; responseBody = RestAssured .given() .baseUri("https://restful-booker.herokuapp.com/") .basePath("booking") .contentType(ContentType.JSON) .body("{\r\n" + " \"firstname\" : \"Jim\",\r\n" + " \"lastname\" : \"Brown\",\r\n" + " \"totalprice\" : 111,\r\n" + " \"depositpaid\" : true,\r\n" + " \"bookingdates\" : {\r\n" + " \"checkin\" : \"2018-01-01\",\r\n" + " \"checkout\" : \"2019-01-01\"\r\n" + " },\r\n" + " \"additionalneeds\" : \"Breakfast\"\r\n" + "}") .when() .post() .then() .extract() .body() // Extract response as Map<String,Object> .as(new TypeRef<Map<String,Object>>() {}); // To print booking id System.out.println("Booking id is : "+responseBody.get("bookingid")); // If we do not use below annotation then also no problem. As we are directly casting without checking // so I have used it to surpass warning. @SuppressWarnings("unchecked") // Since "booking" key holds another JSON Object to parsing it again as Map. Map<String,Object> bookingDetails = (Map<String,Object>)responseBody.get("booking"); System.out.println("First name is "+ bookingDetails.get("firstname")); } } |
Output
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Booking id is : 11 First name is Jim |
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