Spring Batch Flat File Item Writer Example

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Batch processing is the execution of a series of programs (“jobs”) on a computer without manual intervention.

Spring Batch Flat File Item Writer Example Pdf

Exception Handling in Flat Files 6.6.3. FlatFileItemWriter LineAggregator Simplified File Writing Example FieldExtractor Delimited File Writing Example Fixed Width File Writing Example Handling File Creation 6.7. XML Item Readers and Writers 6.7.1. StaxEventItemReader 6.7.2. StaxEventItemWriter 6.8. Multi-File Input 6.9.

  1. Wraps a ResourceAwareItemWriterItemStream and creates a new output resource when the count of items written in current resource exceeds #setItemCountLimitPerResource.
  2. This class is an item writer that writes data to a file or stream. The writer also provides a restart. The location of the output file is defined by a Resource and must represent a writable file.
  3. 15-writing-items-to-db - writing items to a jdbc database source; 16-writing-items-to-fs - writing items to a flat file; 17-writing-items-to-xml - writing items to an XML file; 18-writing-to-multiple-files - writing items to multiple files/formats; Processors. 19-processing-basic - processing an item, basic example.
  4. 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.

Spring Batch provides mechanisms for processing large amount of data like transaction management, job processing, resource management, logging, tracing, conversion of data, interfaces, etc.
These functionalities are available out of the box and can be reused by applications containing the Spring Batch framework.

In this tutorial, we will show you how to configure a Spring Batch job to read CSV file into a CSV file, and filter out the record before writing with ItemProcessor. Its a very easy program for beginners.

Tools and libraries used

  1. Maven 3
  2. Eclipse Luna
  3. JDK 1.7
  4. Spring Core 3.2.2.RELEASE
  5. Spring Batch 2.2.0.RELEASE
  6. Spring OXM 3.2.2.RELEASE

Spring Batch Flat File Item Writer Examples

1. Create a maven project . I named my project as SpringBatchProject.

2. Project Dependencies –

3. Project Structure –

Spring Batch Flat File Item Writer Example Free

4. CSV file resources/files/input.csv

Spring Batch Flat File Item Writer Example Program

5. Read CSV file resources/jobs/job-report.xml

6. The csv file mapped to Pojo Report.java

7. Spring batch Core Settings

Spring Batch Flat File Item Writer Example

Define jobRepository and jobLauncher

8. Spring batch Jobs

A Spring batch job, read the report.csvfile, map it to Report object, and write it into a csv file.

9. Spring Batch – ItemProcessor

In Spring batch, the wired Processor will be fired before writing to any resources, so, this is the best place to handle any conversion, filtering and business logic. In this example, the Report object will be ignored (not write to csv file) if its’ age is greater than equal to 30.

10. I have scheduled this process which will run in every 5 seconds through cron jobs.

RunScheduler.java

11. Run the Main class now

12. output csv file i.e. report.csv