This document discusses how to convert an object to JSON using Mule ESB. It describes creating a Java POJO class called User with name and surname fields, populating an instance of it using a setPayload component, and then adding an Object-to-JSON transformer to output the JSON representation of the User object. Running the application results in a log output containing the JSON string with name and surname values.

1. Mule ESB
How to convert from Object to Json

2. In this tutorial we will be creating an easy object to json converter using mule esb.
Let’s begin creating a simple flow with an http listener, in order to trigger the
transformation:
Now, let’s create a java pojo class, called User, like this:

3. package com.mulechampion;
import java.io.Serializable;
public class JsonClass implements Serializable{
/**
*
*/
private static final long serialVersionUID = -5645625751838751914L;
private String name;
private String surname;
public JsonClass(String name, String surname) {
super();
this.name = name;
this.surname = surname;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSurname() {
return surname;
}
public void setSurnme(String surnme) {
this.surname = surnme;
}
@Override
public String toString() {
return "JsonClass [name=" + name + ", surname=" + surname + "]";
}
}

4. Now we can use the setPayload component to populate the bean created before:
Value: #[new.com.mulechampion.JsonClass(‘Usern’,’Users)]
As expected, running this app, will produce the following log on console:
HTTP_Listener_Configuration.worker.01]
org.mule.api.processor.LoggerMessageProcessor: JsonClass [name=Usern,
surname=Users]

5. Now let’s add the Object-to-json transformer in order to obtain the output JSON
If we launch the application, calling it, we will obtain the json output, as wanted!
HTTP_Listener_Configuration.worker.01]
org.mule.api.processor.LoggerMessageProcessor:
{"name":“Usern","surname":“Users"}
Enjoy with the MULE!