CSV file read and write using Spring Batch

READ THE DATA FROM CSV FILE AND SEND THE DATA TO MYSQL DATABASE

We show you how to configure Spring Batch Boot Job to read information from Mysql Database and write to CSV file using SpringBoot.Spring Batch Boot to read from MySQL database using JdbcCursorItemReader and write to a Flat file using FlatFileItemWriter.

Create Database Table and Populate it with Sample data:

CREATE DATABASE employees;

Project Structure:

The below screenshot shows the final structure of the project

Creating the Project:

Open SpringBoot app Go to File -> New -> Other ….. Select the Spring Starter web project then click on Next as shown in below figure

Application.properties:

In this, we have written the properties values for the spring-boot application under the src/main/resources folder.

Create the CSV File :

  • We create the Employee.java file in the src/main/java folder.
  • Create an Employee.java class in com.springbatch.csv.db package and write the following code in it for the Employee class. Employee class is nothing but Bean or Pojo class.

Processor:

A custom user processor class that will process each and every user object. Create EmployeeProcessor.java class under com.springbatch.csv.db package and the following code :

Spring Batch Boot Configurations:

Create a job that will read from the database and write it into a CSV file. Create BatchConfiguration.java class under com. springbatch.csv.DB package and the following code:

READ THE DATA FROM MYSQL DATABASE WRITE INTO A CSV FILE

We show you how to configure Spring Batch Boot Job to read information from a CSV file and write to MySQL Database using SpringBoot.Spring Batch Boot to read from MySQL database using JdbcCursorItemReader and write to a Flat file using FlatFileItemWriter.

Create Database Table and Populate it with Sample data:

CREATE DATABASE employees;

Project Structure:

The following screenshot shows the final structure of the project:

Creating the Project :

Open SpringBoot app Go to File -> New -> Other ….. Select the Spring Starter web project then click on Next as shown in below figure

Application.properties:

In this, we have written the properties values for the spring-boot application under the src/main/resources folder.

Create the CSV File:

  • We create the users.csv file in the src/main/resources folder. Model
  • Create a User class under com.springBoot_batch package and write the following code in it.

Processor :

A custom user processor class that will process each and every User object. Create a UserItemProcessor class under com.spring-boot package and write the following code in it.

SPRING BATCH BOOT CONFIGURATION:

Create a Job that will read from the database and write into the CSV file. Create a BatchConfiguration class under com.spring-boot package and write the following code in it.

Run Spring Batch Boot :

Right-click to the SpringBootDatabaseToCsv Application Class , select Run As -> Spring Boot App. This application will read the data from the user table and write it into the CSV file.

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