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REST Assured Tutorial 57 – Editing Existing JSON Object On The Fly Using JsonNode – Jackson

Introduction

As a part of End to End REST Assured Tutorial, in this post, we will edit or customize existing JSON object on the fly using JsonNode of Jackson API.

Many times we do not want to create POJO classes and we may need to edit an existing JSON quickly as per requirement. In that case, JsonNode provided by Jackson API is really helpful.

Prerequisite

Since we are using Jackson API of Java for this example, make sure you have the latest dependency of Jackson Databind in your project classpath. I have used below Jackson dependency for this post:-

You must go through with below posts first to understand this post better:-

How To Create A JSON Object Using Jackson API – ObjectMapper – CreateObjectNode()

How To Create JSON Array Using Jackson API – ObjectMapper – CreateArrayNode()

Editing JSON using JsonNode

Adding a new key with a primitive value to existing JSON

Suppose we have an existing JSON as below:-

Let’s add a new field “role” with value as “admin“.

We will deserialize the above JSON object as ObjectNode as given JSON is a JSON Object. Please note here that the superclass of ObjectNode is JsonNode.

Output

Adding a new key with a JSON object value to an existing JSON

Let’s add a new key with value as a JSON object. For example – Adding a new field “bookingDetails” with the below value. Basically, we need to add an ObjectNode and the post link under the Prerequisite section explains that concept.

Output

Adding a new key inside a nested JSON Object

In the output of the above program, suppose we need to add another key inside “bookingDetails” key. I.e final output should be as below:-

Update value of existing keys

We can also modify the value of existing keys.

Output

Remove or delete existing key

We can also remove keys from a given JSON Object.

Output

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

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If you have any doubt, feel free to comment below.
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Author: Amod Mahajan

My name is Amod Mahajan and I am an IT employee with 6+ years of experience in Software testing and staying in Bengaluru. My area of interest is Automation testing. I started from basics and went through so many selenium tutorials. Thanks to Mukesh Otwani as his tutorials are easy and cover basics to advance. I have habit of exploring concepts by deep diving. I used to make notes. I thought of sharing my knowledge through posts and now I am here. #KeepLearning #ShareLearning

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REST Assured Tutorial 57 – Editing Existing JSON Object On The Fly Using JsonNode – Jackson

by Amod Mahajan time to read: 4 min
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