REST Assured Tutorial 66 – How To Parse A JSON Array Response To A Java List In Rest Assured?


As a part of the End to End REST Assured Tutorial, in this post, we will learn to parse a JSON Array response to a Java List 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 Array response into a Java List directly. It is useful if you do not use Pojo classes.

Prerequisite post

How To Parse A JSON Object Response To A Java Map In Rest Assured

Required Dependency

We are using the below version of Rest Assured:-

Parse JSON Array Response to Java List

Once a response is returned and if it is a JSON array then we can parse them as a List. There is a method called as() which takes a TypeRef reference to support classes with generics. For example – A JSON Array can be represented as a List<Object>. To cast Json Array 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

package RestAssuredConcepts;

import java.util.List;
import java.util.Map;

import io.restassured.RestAssured;
import io.restassured.common.mapper.TypeRef;

public class ParseJsonArrayResponseToList {

	public static void main(String[] args) {
		List> responseBody = null;
		responseBody = 
				// Extract response as List>
				// Since the response in a List of Map format.
				.as(new TypeRef>>() {});
		System.out.println("Total bookings : "+ responseBody.size());
		System.out.println("All booking ids are: ");
		for(Map booking : responseBody)
Total bookings : 10
All booking ids are: 

You can download/clone the above sample project from here.

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