Convert Java Object to JSON String using Jackson API

Convert Java Object to JSON String using Jackson API

Learn how to Convert Java Object Into JSON String using Jackson API. JSON Stand for JavaScript Object Notation. JSON is highly recommended to transmit data between a server and web application.

JSON Stand for JavaScript Object Notation. It’s a standard text-based format which shows structured data based on JavaScript object syntax. It is commonly used for transmitting data in web applications. JSON is highly recommended to transmit data between a server and web application.

To convert a Java object into JSON, the following methods can be used:

  • GSON

In this article, Java object is converted into the JSON using Jackson API:

The steps to do this are as follows:

  1. Add jar files of Jackson (in case of Maven project add Jackson dependencies in pom.xml file)

Below is the screenshot showing this step:

  1. Create a POJO (Plain Old Java Object) to be converted into JSON

Java Class

package com.Geeks; 

public class Organisation { 
    private String organisation_name; 
    private String description; 
    private int Employees; 

    // Calling getters and setters 
    public String getOrganisation_name() 
        return organisation_name; 

    public void setOrganisation_name(String organisation_name) 
        this.organisation_name = organisation_name; 

    public String getDescription() 
        return description; 

    public void setDescription(String description) 
        this.description = description; 

    public int getEmployees() 
        return Employees; 

    public void setEmployees(int employees) 
        Employees = employees; 

    // Creating toString 
    public String toString() 
        return "Organisation [organisation_name="
            + organisation_name 
            + ", description="
            + description 
            + ", Employees="
            + Employees + "]"; 

Below is the screenshot showing this step:

  1. Create a Java class for converting the Organisation object into JSON. Convert the object into JSON using ObjectMapper class of Jackson API.
package com.Geeks; 

import com.Geeks.Organisation; 

public class ObjectToJson { 
    public static void main(String[] a) 

        // Creating object of Organisation 
        Organisation org = new Organisation(); 

        // Insert the data into the object 
        org = getObjectData(org); 

        // Creating Object of ObjectMapper define in Jakson Api 
        ObjectMapper Obj = new ObjectMapper(); 

        try { 

            // get Oraganisation object as a json string 
            String jsonStr = Obj.writeValueAsString(org); 

            // Displaying JSON String 

        catch (IOException e) { 

    // Get the data to be inserted into the object 
    public static getObjectData(Organisation org) 

        // Insert the data 
        org.setDescription("A computer Science portal for Geeks"); 

        // Return the object 
        return org; 
  1. Execute the process.
  2. The output in the JSON will be as below:
  "organisation_name" : "GeeksforGeeks",
  "description" : "A computer Science portal for Geeks",
  "Employee" : "2000"

Below is the screenshot showing this output:

json java web-development javascript

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