5.2、使用BIRT API创建Grid

在使用BIRT API前，得先配置一下BIRT的环境，也就是Birt -Runtime,使用是需要用到BIRT-runtime文件夹下的ReportEngine文件夹下的内容。

如果都准备好了，那就开始吧

先新建一个Java项目，比如JavaBirtExample，添加依赖的jar文件，因为BIRT基于OSGI的，所以org.eclipse.equinox.common这个文件是一定要的，如果要用到图表的话还需要emf对应的文件。

/** * 使用BIRT　API创建BIRT Grid 。 * @author 刘尧兴 * <p>2009-2-18</p> */public class CreateGridReport {public static final String BIRT_HOME = "D:/DeveloperTools/birt-runtime-2_3_1/ReportEngine";public static void createReport() throws Exception {DesignConfig designConfig = new DesignConfig();designConfig.setBIRTHome(BIRT_HOME);IDesignEngine designEngine = null;try {Platform.startup(designConfig);String extensionId = IDesignEngineFactory.EXTENSION_DESIGN_ENGINE_FACTORY;IDesignEngineFactory factory = (IDesignEngineFactory)Platform.createFactoryObject(extensionId);designEngine = factory.createDesignEngine(designConfig);}catch (Exception e) {e.printStackTrace();}SessionHandle sessionHandle = designEngine.newSessionHandle(ULocale.CHINESE);ReportDesignHandle designHandle = sessionHandle.createDesign();ElementFactory elementFactory = designHandle.getElementFactory();DesignElementHandle elementHandle = elementFactory.newSimpleMasterPage("Page Master");designHandle.getMasterPages().add(elementHandle);GridHandle gridHandle = elementFactory.newGridItem(null, 2, 1);gridHandle.setWidth("100%");designHandle.getBody().add(gridHandle);RowHandle rowHandle = (RowHandle)gridHandle.getRows().get(0);CellHandle cellHandle = (CellHandle)rowHandle.getCells().get(0);LabelHandle labelHandle = elementFactory.newLabel(null);labelHandle.setText("第一列,第一行");cellHandle.getContent().add(labelHandle);cellHandle = (CellHandle)rowHandle.getCells().get(1);labelHandle = elementFactory.newLabel("第二列,第一行");labelHandle.setText("第二列,第一行");cellHandle.getContent().add(labelHandle);SharedStyleHandle styleHandle = elementFactory.newStyle("MyStyle");styleHandle.getBorderTopWidth().setValue(1);styleHandle.getBorderBottomWidth().setValue(1);styleHandle.getBorderLeftWidth().setValue(1);styleHandle.getBorderRightWidth().setValue(1);styleHandle.setProperty(IStyleModel.BORDER_TOP_STYLE_PROP, DesignChoiceConstants.LINE_STYLE_GROOVE);styleHandle.setProperty(IStyleModel.BORDER_BOTTOM_STYLE_PROP, DesignChoiceConstants.LINE_STYLE_GROOVE);styleHandle.setProperty(IStyleModel.BORDER_LEFT_STYLE_PROP, DesignChoiceConstants.LINE_STYLE_GROOVE);styleHandle.setProperty(IStyleModel.BORDER_RIGHT_STYLE_PROP, DesignChoiceConstants.LINE_STYLE_GROOVE);designHandle.getStyles().add(styleHandle);for(int i = 0;i<gridHandle.getColumnCount();i++) {ColumnHandle colHandle = (ColumnHandle)gridHandle.getColumns().get(i);colHandle.setStyle(styleHandle);}File file = new File("c:/temp/GridReport.rptdesign");if(!file.exists()) file.createNewFile();designHandle.saveAs(file.toString());designHandle.close();System.out.println("创建成功！");}public static void main(String[] args) {try {createReport();}catch (Exception e) {e.printStackTrace();}}}

执行之后，会在c:/temp目录下面创建一个GridReport.rptdesign文件，预览一下结果为：