Excel import and export

This project contains utilities to import objects from an excel file. It also contains functions to export data from objects an to excel file.

Get it as a maven dependency :

   <dependency>
            <groupId>io.github.belmomusta</groupId>
            <artifactId>excel-import-export</artifactId>
            <version>1.1</version>
   </dependency>

Usage:

1. Importing

final String file = "the path to a valid excel file";
final Collection<Car> cars = ExcelImporter.extract(Car.class)
                .from(file)
                .inSheetNumber(0)
                .map("id").toCell(0)
                .map("name").toCell(1)
                .map("model").toCell(2)
                .get();

This snippet creates a collection of cars from the first sheet of an excel workbook. The importing is also possible with the annotation marker. The object classes to import will have the @ExcelCell on the fields that we want to import. For example :

@ExcelRow // not supported yet
public class CarWithAnnotations {
	@ExcelCell(0)
	private int id;
	@ExcelCell(1)
	private String name;
	@ExcelCell(2)
	private String model;
	....
	 }
	Collection<CarWithAnnotations> cars = ExcelImporterAnnotation.extract(CarWithAnnotations.class)
				.from(file)
				.inSheetNumber(0)
				.get();

2. Exporting

To export a collection of items to an excel file, You an use the ExcelExporterService to do so. Here is a common example of use :

Without annotations

  final Car car = new Car();
  car.setId(22);
  car.setModel("My model");
  car.setName("a car name");

 final File destinationFile = new File("cars-exported.xlsx");
 		ExcelExporterService.exportContent(Collections.singletonList(car))
 				.toFile(destinationFile)
 				.withHeaders()
 				.map("id").toCell(0)
 				.map("name").toCell(1)
 				.map("model").toCell(2)
 				.export();

Export content using method names on the exported class

Used methods should have no args, and have a specific return value, void methods are not supported.

final Car car = new Car();
		car.setId(22);
		car.setModel("My model");
		car.setName("a car name");

		final File destinationFile = new File("cars-exported-with-method.xlsx");
		ExcelExporter.exportContent(Collections.singletonList(car))
				.toFile(destinationFile)
				.mapMethod("getId").toCell(0)
				.mapMethod("getName").toCell(1)
				.mapMethod("getModel").toCell(4)
				.withHeaders("id", "name", "model") // Here you van specify headers
				.export();

With annotations

final CarWithAnnotations car = new CarWithAnnotations();
		car.setId(22);
		car.setModel("My model");
		car.setName("a car name");

		final File destinationFile = new File("cars-exported-with-annotations.xlsx");
		ExcelExporterAnnotation.exportContent(Collections.singletonList(car))
				.toFile(destinationFile)
				.withHeaders("id", "name", "model")
				.export();

Dependencies :

• Apache POI 3.15
• Apache Commons-IO 2.6
• Junit 4.13 for testing