下載Stimulsoft Reports Java最新版本

此示例項目顯示了使用關系和自定義對象數據庫在運行時創建報表的可能性。

首先，創建一個將存儲數據的對象類。

public class ObjectCell {
    public String val;
 
    @Override
    public boolean equals(Object obj) {
        return val.equals(((ObjectCell) obj).val);
    }
 
    public String toString() {
        return val;
    }
 
    public ObjectCell(String val) {
        this.val = val;
    }
}

接下來，創建從StiDatabase類擴展的父數據庫并填充connect事件上的數據。

public class ParentDatabase extends StiDatabase {
 
    public ParentDatabase() {
        super("Demo.Parent");// Database name
    }
 
    public void connect(StiDataStoreSource stiDataStoreSource, Boolean fillTable) throws StiException {
        DataTable dataTable = stiDataStoreSource.createNewTable();
        for (int i = 0; i < 5; i++) {
            DataRow dataRow = dataTable.createNewRow();
            dataRow.addCell("cId", new ObjectCell("Object" + i));
            dataRow.addCell("cName", "Parent cId: " + i);
        }
        stiDataStoreSource.setDataTable(dataTable);
    }
 
    public void disconnect() {
    }
 
    public void connect(StiDataStoreSource stiDataStoreSource) throws StiException {
        connect(stiDataStoreSource, true);
    }
}

接下來，創建相同的子數據庫。

public class ChildDatabase extends StiDatabase {
 
    public ChildDatabase() {
        super("Demo.Child");// Database name
    }
 
    public void connect(StiDataStoreSource stiDataStoreSource, Boolean fillTable) throws StiException {
        DataTable dataTable = stiDataStoreSource.createNewTable();
        for (int i = 0; i < 5; i++) {
            for (int k = 0; k < 5; k++) {
                DataRow dataRow = dataTable.createNewRow();
                dataRow.addCell("cId", new ObjectCell("Object" + i));
                for (int j = 1; j < dataRow.getColumns().size(); j++) { // fill row wiht my data
                    dataRow.addCell(dataRow.getColumns().get(j).getColumnName(), "Child cId: " + i + " value: " + j);
                }
            }
        }
        stiDataStoreSource.setDataTable(dataTable);
    }
 
    public void disconnect() {
    }
 
    public void connect(StiDataStoreSource stiDataStoreSource) throws StiException {
        connect(stiDataStoreSource, true);
    }
}

要顯示報表，我們需要創建Java查看器。創建JFrame，設置必要的選項并添加查看器控件。

public class CreateRelationsReport extends JPanel {
 
    private static final long serialVersionUID = 330448692680237867L;
    private static final Dimension FRAME_SIZE = new Dimension(800, 800);
    public static void main(final String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                try {
                    JFrame frame = new JFrame();
                    frame.add(new CreateRelationsReport(frame));
                    frame.setSize(FRAME_SIZE);
                    frame.setLocationRelativeTo(null);
                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    frame.setVisible(true);
                } catch (Throwable e) {
                    StiExceptionProvider.show(e, null);
                }
            }
        });
    }
    public CreateRelationsReport(final JFrame parentFrame) throws IOException {
    setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
    setPreferredSize(FRAME_SIZE);
    StiViewerFx viewerPanel = new StiViewerFx(parentFrame);
    add(viewerPanel);
...

接下來，創建新的報表對象，然后將父數據庫和子數據庫添加到其中。

...
    StiReport report = new StiReport();
 
    StiPage page = new StiPage(report);
    report.getPages().add(page);
    page.setName(StiNameCreation.createName(report, StiNameCreation.generateName(page)));
    report.setDictionary(new StiDictionary(report));
    report.getDictionary().getDatabases().add(new ParentDatabase());
    report.getDictionary().getDatabases().add(new ChildDatabase());
...

接下來，在對象表源中設置自定義列。

...
    List<StiDataTableSource> tableSources = new ArrayList<StiDataTableSource>();
    // parent
    StiDataTableSource tSource = new StiDataTableSource("Demo.Parent", "Parent", "Parent");
    tSource.setColumns(new StiDataColumnsCollection());
    tSource.getColumns().add(
        new StiDataColumn("cId", "cId", StiSystemType.getSystemType("System.Object")));
    tSource.getColumns().add(
        new StiDataColumn("cName", "cName", StiSystemType.getSystemType("System.String")));
    tSource.setDictionary(report.getDictionary());
    report.getDictionary().getDataSources().add(tSource);
    tableSources.add(tSource);
    // child
    tSource = new StiDataTableSource("Demo.Child", "Child", "Child");
    tSource.setColumns(new StiDataColumnsCollection());
    tSource.getColumns().add(
        new StiDataColumn("cId", "cId", StiSystemType.getSystemType("System.Object")));
    for (int i = 0; i < 4; i++) {
        tSource.getColumns().add(
           new StiDataColumn("cData" + i, "cData" + i,
           StiSystemType.getSystemType("System.String")));
    }
    tSource.setDictionary(report.getDictionary());
    report.getDictionary().getDataSources().add(tSource);
    tableSources.add(tSource);
...

將帶有文本框的標題區帶和數據帶添加到報表中。

...
    // Create TitleBand
    StiHeaderBand titleBand = new StiHeaderBand();
    titleBand.setHeight(0.85);
    titleBand.setName("TitleBand");
    page.getComponents().add(titleBand);
 
    // Create Title text on header
    StiText headerText = new StiText(new StiRectangle(0, 0, page.getWidth(), 0.85));
    headerText.setTextInternal("Tacticdescription");
    headerText.setHorAlignment(StiTextHorAlignment.Left);
    headerText.setName("TitleHeader");
    headerText.setFont(new StiFont("Arial", 12F, StiFontStyle.Bold));
    titleBand.getComponents().add(headerText);
    Integer nameIndex = 1;
    List<StiDataBand> dataBands = new ArrayList<StiDataBand>();
    for (StiDataTableSource tableSource : tableSources) {
 
        // Create Databand
        StiDataBand dataBand = new StiDataBand();
        dataBand.setDataSourceName(tableSource.getName());
        dataBand.setHeight(0.5);
        dataBand.setName("DataBand" + nameIndex);
        nameIndex++;
        page.getComponents().add(dataBand);
 
        double pos = 0;
        double columnWidth = page.getWidth() / tableSource.getColumns().size();
 
        for (StiDataColumn dataColumn : tableSource.getColumns()) {
 
            StiText dataText = new StiText(new StiRectangle(pos, 0, columnWidth, 0.5));
            dataText.setText("{" + tableSource.getName() + "." + dataColumn.getName() + "}");
            dataText.setName("DataText" + nameIndex.toString());
            dataText.getBorder().setSide(StiBorderSides.All);
            dataBand.getComponents().add(dataText);
 
            pos = pos + columnWidth;
            nameIndex++;
        }
        dataBands.add(dataBand);
    }
...

創建報表的所有組件，我們現在可以配置數據關系。

...
    dataBands.get(1).setDataRelationName("Relation");
    dataBands.get(1).setMasterComponent(dataBands.get(0));
 
    ArrayList<String> cols = new ArrayList<String>();
    cols.add("cId");
 
    StiDataRelation rel = new StiDataRelation("Relation", tableSources.get(0),
    tableSources.get(1), cols, cols);
 
    report.getDictionary().getRelations().add(rel);
...

最后，渲染報表并在Java查看器中顯示它。

...
    report.Render();
 
    viewerPanel.getStiViewModel()
        .getEventDispatcher()
        .dispatchStiEvent(
            new StiViewCommonEvent(StiViewCommonEvent.DOCUMENT_FILE_LOADED,
            new StiDocument(report), null));
}

示例代碼的結果如下圖所示：

購買Stimulsoft正版授權，請點擊“”喲！