// Fill the report Map<String, Object> params = new HashMap<>(); JasperPrint jasperPrint = JasperFillManager.fillReport("example.jasper", params, dataSource);
// Prepare data List<Data> dataList = new ArrayList<>(); dataList.add(new Data("John", 30)); dataList.add(new Data("Jane", 25));
import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;