DynamicReports Page subreport - create subreport in a page of the parent report and set report/subreport/component border

One way to create a page with different subreports is to list the subreports in the detail of the report and add a page break at the end of the list.

To create a border of a subreport, you can put the subreport in a HorizontalList or a VerticalList and add a border to this component.

import java.util.ArrayList;
import java.util.List;
import net.sf.dynamicreports.jasper.builder.JasperReportBuilder;
import static net.sf.dynamicreports.report.builder.DynamicReports.cmp;
import static net.sf.dynamicreports.report.builder.DynamicReports.col;
import static net.sf.dynamicreports.report.builder.DynamicReports.exp;
import static net.sf.dynamicreports.report.builder.DynamicReports.report;
import static net.sf.dynamicreports.report.builder.DynamicReports.stl;
import net.sf.dynamicreports.report.builder.component.SubreportBuilder;
import net.sf.dynamicreports.report.builder.datatype.DataTypes;
import net.sf.dynamicreports.report.constant.HorizontalAlignment;
import net.sf.dynamicreports.report.constant.StretchType;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;

public class PageSubreportTest {
    public static void main(String[] args){
        new PageSubreportTest();
    }
 
    public PageSubreportTest() {
        JasperReportBuilder report = build();
        try {
            report.show();
        }catch (DRException e){
            e.printStackTrace();
        }
    }
 
    private JasperReportBuilder build() {
        JasperReportBuilder report = report();
        report.setDataSource(createDataSource());
     
        SubreportBuilder storeSubreport = cmp.subreport(buildStoreSubReport())
                .setDataSource(exp.subDatasourceBeanCollection("storeData"));
        SubreportBuilder fruitSubreport = cmp.subreport(buildFruitSubReport())
                .setDataSource(exp.subDatasourceBeanCollection("fruitData"));
     
        report.detail(cmp.horizontalList(cmp.horizontalGap(50),storeSubreport, cmp.horizontalGap(50)),
                cmp.verticalGap(15),
                //To set the border for the fruitSubreport
                //put it in a horizontallist and then set the border
                cmp.horizontalList(fruitSubreport)
                        .setStretchType(StretchType.RELATIVE_TO_TALLEST_OBJECT)
                        .setStyle(stl.style().setBorder(stl.pen1Point())),
                //For page subreport, set the page break at the end.
                //Otherwise, it will become detail subreport.
              cmp.pageBreak());
        report.title(cmp.text("Fuit Stores Report")
            .setStyle(stl.style().bold()
                    .setHorizontalAlignment(HorizontalAlignment.CENTER)));
        report.pageFooter(cmp.pageXofY());
     
        return report;
    }
 
    private JasperReportBuilder buildStoreSubReport(){
        JasperReportBuilder storeReport = report();
        storeReport.columns(col.column("", "storeInfo", DataTypes.stringType()));
     
        return storeReport;
    }
 
    private JasperReportBuilder buildFruitSubReport(){
        JasperReportBuilder fruitReport = report();
        fruitReport.columns(col.column("Name", "fruitName", DataTypes.stringType()),
                col.column("Price", "fruitPrice", DataTypes.doubleType())
                    .setPattern("$#,###,##0.00")
                    .setHorizontalAlignment(HorizontalAlignment.LEFT),
                col.column("Description", "des", DataTypes.stringType()));
     
        fruitReport.setColumnTitleStyle(stl.style().bold());
        return fruitReport;
    }
 
    private JRBeanCollectionDataSource createDataSource() {
            List<ReportData> dataSource = new ArrayList<ReportData>();
     
            ReportData data = new ReportData();
            List<StoreData> storeList = new ArrayList<StoreData>();
            List<FruitData> fruitList = new ArrayList<FruitData>();

            //first set of data
            StoreData storeData = new StoreData();
            storeData.setStoreInfo("Delicious Fruit");
            storeList.add(storeData);
            storeData = new StoreData();
            storeData.setStoreInfo("554 Main Street, Burlington, MN 33596");
            storeList.add(storeData);
            data.setStoreData(storeList);
         
            FruitData fruitData = new FruitData();
            fruitData.setFruitName("Apple");
            fruitData.setFruitPrice(1.98d);
            fruitData.setDes("Medium juicy");
            fruitList.add(fruitData);
            fruitData = new FruitData();
            fruitData.setFruitName("Orange");
            fruitData.setFruitPrice(0.98d);
            fruitData.setDes("Very juicy");
            fruitList.add(fruitData);
            data.setFruitData(fruitList);
            dataSource.add(data);
         
            //second set of data
            data = new ReportData();
            storeList = new ArrayList<StoreData>();
            fruitList = new ArrayList<FruitData>();
         
            storeData = new StoreData();
            storeData.setStoreInfo("Fruit Outlet");
            storeList.add(storeData);
            storeData = new StoreData();
            storeData.setStoreInfo("99 Uphill Ave., Rochester, MN 33596");
            storeList.add(storeData);
            data.setStoreData(storeList);
         
            fruitData = new FruitData();
            fruitData.setFruitName("Papaya");
            fruitData.setFruitPrice(2.98d);
            fruitData.setDes("Medium juicy");
            fruitList.add(fruitData);
            fruitData = new FruitData();
            fruitData.setFruitName("Mango");
            fruitData.setFruitPrice(3.98d);
            fruitData.setDes("Medium juicy");
            fruitList.add(fruitData);
            data.setFruitData(fruitList);
            dataSource.add(data);
           
            return new JRBeanCollectionDataSource(dataSource);
    }
 
    public class ReportData {
        private List<StoreData> storeData;
        private List<FruitData> fruitData;
     
        public List<StoreData> getStoreData() { return storeData; }
        public void setStoreData(List<StoreData> s) { storeData = s; }
        public List<FruitData> getFruitData() { return fruitData; }
        public void setFruitData (List<FruitData> s) { fruitData = s; }
    }
 
    public class StoreData {
        private String storeInfo;
     
        public String getStoreInfo() { return storeInfo; }
        public void setStoreInfo(String s) { storeInfo = s; }
    }
 
    public class FruitData {
        private String fruitName;
        private Double fruitPrice;
        private String des;
     
        public String getFruitName() { return fruitName; }
        public void setFruitName(String s) { fruitName = s; }
        public Double getFruitPrice() { return fruitPrice; }
        public void setFruitPrice(Double s) { fruitPrice = s; }
        public String getDes() { return des; }
        public void setDes(String s) { des = s; }
    }
}

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References:
1. DynamicReports: Row Subreport - create a subreport in each row of the parent report
2. DynamicReports: Column Subreport - create subreport in a column of the parent report