Birt读取报表设计文件，然后显示

 package testreport;import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.net.URL;import java.util.HashMap;import org.eclipse.birt.core.framework.Platform;import org.eclipse.birt.report.engine.api.EngineConfig;import org.eclipse.birt.report.engine.api.EngineConstants;import org.eclipse.birt.report.engine.api.EngineException;import org.eclipse.birt.report.engine.api.HTMLRenderContext;import org.eclipse.birt.report.engine.api.HTMLRenderOption;import org.eclipse.birt.report.engine.api.IRenderOption;import org.eclipse.birt.report.engine.api.IReportEngine;import org.eclipse.birt.report.engine.api.IReportEngineFactory;import org.eclipse.birt.report.engine.api.IReportRunnable;import org.eclipse.birt.report.engine.api.IRunAndRenderTask;import org.eclipse.jface.action.IToolBarManager;import org.eclipse.jface.viewers.IStructuredContentProvider;import org.eclipse.jface.viewers.ITableLabelProvider;import org.eclipse.jface.viewers.LabelProvider;import org.eclipse.jface.viewers.TableViewer;import org.eclipse.jface.viewers.Viewer;import org.eclipse.swt.SWT;import org.eclipse.swt.browser.Browser;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.widgets.Composite;import org.eclipse.ui.ISharedImages;import org.eclipse.ui.PlatformUI;import org.eclipse.ui.part.ViewPart;public class View extends ViewPart {public static final String ID = "TestReport.view";private Browser browser;private TableViewer viewer;/** * The content provider class is responsible for providing objects to the * view. It can wrap existing objects in adapters or simply return objects * as-is. These objects may be sensitive to the current input of the view, * or ignore it and always show the same content (like Task List, for * example). */class ViewContentProvider implements IStructuredContentProvider {public void inputChanged(Viewer v, Object oldInput, Object newInput) {}public void dispose() {}public Object[] getElements(Object parent) {return new String[] { "One", "Two", "Three" };}}class ViewLabelProvider extends LabelProvider implementsITableLabelProvider {public String getColumnText(Object obj, int index) {return getText(obj);}public Image getColumnImage(Object obj, int index) {return getImage(obj);}public Image getImage(Object obj) {return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_ELEMENT);}}/** * This is a callback that will allow us to create the viewer and initialize * it. */// public void createPartControl(Composite parent) {// viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL// | SWT.V_SCROLL);// viewer.setContentProvider(new ViewContentProvider());// viewer.setLabelProvider(new ViewLabelProvider());// viewer.setInput(getViewSite());// }public void createPartControl(Composite parent) {browser = new Browser(parent, SWT.NONE);try {this.previewReport();} catch (EngineException e) {e.printStackTrace();}initializeToolBar();}private void previewReport() throws EngineException {EngineConfig config = new EngineConfig();// Create the report engineIReportEngineFactory factory = (IReportEngineFactory) Platform.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);IReportEngine engine = factory.createReportEngine(config);IReportRunnable design = null;try {// Open a report design -// use design to// modify design, retrieve// embedded images etc.String report = "http://10.1.1.148:9090/DsrEli-ReportServer/test.rptdesign";//String report = "http://10.1.1.148:9090/DsrEli-ReportServer/frameset?__report=report/main/Annuallywork.rptdesign";URL url = new URL(report);InputStream fs = url.openStream();design = engine.openReportDesign(fs);IRunAndRenderTask task = engine.createRunAndRenderTask(design);// Set Render context to handle url// and image locationsHTMLRenderContext renderContext = new HTMLRenderContext();renderContext.setImageDirectory("c:/test");HashMap<String, HTMLRenderContext> contextMap = new HashMap<String, HTMLRenderContext>();contextMap.put(EngineConstants.APPCONTEXT_HTML_RENDER_CONTEXT,renderContext);task.setAppContext(contextMap);// Set rendering options -// such as file or stream output,// output format, whether it is// embeddable, etc// Render report to// ByteIRenderOption options;options = new HTMLRenderOption();ByteArrayOutputStream bos = new ByteArrayOutputStream();options.setOutputStream(bos);options.setOutputFormat("html");task.setRenderOption(options);// run the report and destroy thetask.run();task.close();// set Browser textbrowser.setText(bos.toString());engine.destroy();} catch (Exception e) {e.printStackTrace();}}/** * Passing the focus request to the viewer's control. */public void setFocus() {viewer.getControl().setFocus();}private void initializeToolBar() {IToolBarManager toolBarManager = getViewSite().getActionBars().getToolBarManager();}}