Hi All, Greetings of the day! Today we will see how we can read multiple files in spring batch using MultiResourceItemReader. Spring batch meta-data tables must be created.If not please refer Scripts to add meta-data tables for spring batch.; You must know how to process single file using spring batch.If you need reference for this please refer Spring Batch Example -CSV To. A job can consist of ‘n’ number of steps. Each step contains Read-Process-Write task or it can have single operation, which is called tasklet.; Read-Process-Write is basically read from a source like Database, CSV etc. Then process the data and write it to a source like Database, CSV, XML etc.
Learn to write CSV data using FlatFileItemWriter. It is an item writer that writes data to a file or stream. The location of the output file is defined by a Resource and must represent a writable file.
Project Structure
In this project, we will learn to –
- Read 3 CSV files from
input/*.csvusingMultiResourceItemReader. - Write whole data to
output/outputData.csvfile usingFlatFileItemWriter.
Spring Batch Flat File Item Writer Example Free
Write data CSV files with FlatFileItemWriter
You need to use FlatFileItemWriter to write lines which were read from CSV files. It write the content to any Resource passed to writer.setResource() method.
Maven Dependency
Look at project dependencies.
Demo
Before running the application, look at complete code of App.java which run the application as Spring boot application.
Run the application
Spring Batch Flat File Item Writer Example Program
Run the application as Spring boot application, and watch the console. Batch job will start at start of each minute. It will read the input file, and print the read values in console.
Spring Batch Flat File Item Writer Examples
Drop me your questions in comments section.
Spring Batch Flat File Item Writer Example Pdf
Happy Learning !!