This document provides a tutorial for converting a CSV file to JSON format using Mule ESB in 5 minutes. It describes creating a simple Mule flow with a file reader component to read a sample CSV file, using a DataWeave transformer to convert the CSV data to JSON format, and adding an object-to-string transformer and logger to output the results.

1. Mule ESB
How to convert from CSV to Json in 5 minutes
Gennaro Spagnoli - 2016

2. Gennaro Spagnoli - 2016
In this tutorial we will be creating an easy csv to json converter using mule esb.
Let’s begin creating a simple flow with file reader component, in order to trigger the
transformation:
Now let’s create a csv file under the folder src/main/resources/input named test.csv in this
way:

3. Gennaro Spagnoli - 2016
Now it’s time to configure the File component to read the csv file just created:
Let’s recall that Polling Frequency is the interval
of polling the input path (in millliseconds)
Now we are ready to put the transformation using the DataWeave component
Click on the «Edit sample data» button and paste the content of
the csv file in order to see the preview, not before having set the
output to application/json and made the payload the output:

4. Gennaro Spagnoli - 2016
Finally, put an Object to String transformer and a Logger to see the results:
[[db_test].converter_testFlow.stage1.02] org.mule.api.processor.LoggerMessageProcessor: [
{
"Billing Street": "111 Boulevard Hausmann",
"Billing City": "Paris",
"Billing Country": "France",
"Billing State": "",
"Name": "Dog Park Industries",
"BillingPostalCode": "75008"
},
{
"Billing Street": "400 South St",
"Billing City": "San Francisco",
"Billing Country": "USA",
"Billing State": "CA",
"Name": "Iguana Park Industries",
"BillingPostalCode": "91156"
},
{
"Billing Street": "777 North St",
"Billing City": "San Francisco",
"Billing Country": "USA",
"Billing State": "CA",
"Name": "Cat Park Industries",
"BillingPostalCode": "91156"
}
]