使用BIRT生成報告的Java代碼

Question

我有一些XML格式的數據，其中包含幾條記錄，並且還創建了一個RPT文件。

那麼現在，我怎樣才能調用birt通過傳遞XML和RPT作爲輸入參數來生成報告。

我對BIRT完全陌生。任何代碼示例將不勝感激。

Answer 1

看到整合的例子從這裏https://wiki.eclipse.org/Integration_Examples_%28BIRT%29

Answer 2

試試這個：BirtEngine.java：

public class BirtEngine { 
    private static IReportEngine birtEngine = null; 
    private static Properties configProps = new Properties(); 
    private final static String configFile = "BirtConfig.properties"; 
    public static synchronized void initBirtConfig() { 
     loadEngineProps(); 
    } 
    public static synchronized IReportEngine getBirtEngine(ServletContext sc) { 
     if (birtEngine == null) 
     { 
      EngineConfig config = new EngineConfig(); 
      if(configProps != null){ 
       String logLevel = configProps.getProperty("logLevel"); 
       Level level = Level.OFF; 
       if ("SEVERE".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.SEVERE; 
       } else if ("WARNING".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.WARNING; 
       } else if ("INFO".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.INFO; 
       } else if ("CONFIG".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.CONFIG; 
       } else if ("FINE".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.FINE; 
       } else if ("FINER".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.FINER; 
       } else if ("FINEST".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.FINEST; 
       } else if ("OFF".equalsIgnoreCase(logLevel)) 
       { 
        level = Level.OFF; 
       } 

       config.setLogConfig(configProps.getProperty("logDirectory"), level); 
      } 

      config.setEngineHome(""); 
      IPlatformContext context = new PlatformServletContext(sc); 
      //IPlatformContext context = new PlatformFileContext(); 
      config.setPlatformContext(context); 
      //Create the report engine 
      //birtEngine = new ReportEngine(config); 
      //ReportEngine engine = new ReportEngine(null); 
      try 
      { 
       Platform.startup(config); 
      } 
      catch (BirtException e) 
      { 
       e.printStackTrace(); 
      } 
      IReportEngineFactory factory = (IReportEngineFactory) Platform 
      .createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY); 
      birtEngine = factory.createReportEngine(config); 
     } 
     return birtEngine; 
    } 
    public static synchronized void destroyBirtEngine() { 
     if (birtEngine == null) { 
      return; 
     }  
     birtEngine.destroy(); 
     Platform.shutdown(); 
     birtEngine = null; 
    } 
    public Object clone() throws CloneNotSupportedException { 
     throw new CloneNotSupportedException(); 
    } 
    private static void loadEngineProps() { 
     try { 
      //Config File must be in classpath 
      ClassLoader cl = Thread.currentThread().getContextClassLoader(); 
      InputStream in = null; 
      in = cl.getResourceAsStream (configFile); 
      configProps.load(in); 
      in.close(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 
} 

webreport.java：

public class WebReport extends HttpServlet { 
    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 
    /** 
    * Constructor of the object. 
    */ 
    private IReportEngine birtReportEngine = null; 
    protected static Logger logger = Logger.getLogger("org.eclipse.birt"); 
    public WebReport() { 
     super(); 
    } 
    /** 
    * Destruction of the servlet. <br> 
    */ 
    public void destroy() { 
     super.destroy(); 
     BirtEngine.destroyBirtEngine(); 
    } 
    /** 
    * The doGet method of the servlet. <br> 
    * 
    */ 
    public void doGet(HttpServletRequest req, HttpServletResponse resp) 
      throws ServletException, IOException { 
     //get report name and launch the engine 
     //resp.setContentType("text/html"); 
     //resp.setContentType("application/pdf"); 
     resp.setContentType("application/msword"); 
     //resp.setHeader ("Content-Disposition","inline; filename=test.pdf"); 
     resp.setHeader("Content-disposition","attachment; filename=\"" +"test.doc" +"\""); 
     String reportName = req.getParameter("ReportName"); 
     ServletContext sc = req.getSession().getServletContext(); 
     this.birtReportEngine = BirtEngine.getBirtEngine(sc); 
     IReportRunnable design; 
     try 
     { 
      //Open report design 
      design = birtReportEngine.openReportDesign(sc.getRealPath("/Reports")+"/"+reportName); 
      //create task to run and render report 
      IRunAndRenderTask task = birtReportEngine.createRunAndRenderTask(design);  
      task.getAppContext().put(EngineConstants.APPCONTEXT_CLASSLOADER_KEY, WebReport.class.getClassLoader()); 
      task.getAppContext().put("BIRT_VIEWER_HTTPSERVLET_REQUEST", req);   
      //set output options 
      //HTMLRenderOption options = new HTMLRenderOption(); 
      //options.setOutputFormat(HTMLRenderOption.OUTPUT_FORMAT_HTML); 
      //options.setOutputStream(resp.getOutputStream()); 
      //options.setImageHandler(new HTMLServerImageHandler()); 
      //options.setBaseImageURL(req.getContextPath()+"/images"); 
      //options.setImageDirectory(sc.getRealPath("/images")); 
      /*PDFRenderOption options = new PDFRenderOption(); 
      options.setOutputFormat(HTMLRenderOption.OUTPUT_FORMAT_PDF);  
      options.setOutputStream(resp.getOutputStream()); 
      */ 
      RenderOption options = new RenderOption(); 
      options.setOutputFormat("doc"); 
      options.setOutputStream(resp.getOutputStream()); 
      //options.setEnableAgentStyleEngine(true); 
      //options.setEnableInlineStyle(true); 
      task.setRenderOption(options); 
      //run report 
      task.run(); 
      task.close(); 
     }catch (Exception e){ 
     e.printStackTrace(); 
      throw new ServletException(e); 
     } 
    } 
    /** 
    * The doPost method of the servlet. <br> 
    * 
    */ 
    public void doPost(HttpServletRequest request, HttpServletResponse response) 
      throws ServletException, IOException { 
     response.setContentType("text/html"); 
     PrintWriter out = response.getWriter(); 
     out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 
     out.println("<HTML>"); 
     out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 
     out.println(" <BODY>"); 
     out.println(" Post Not Supported"); 
     out.println(" </BODY>"); 
     out.println("</HTML>"); 
     out.flush(); 
     out.close(); 
    } 
    /** 
    * Initialization of the servlet. <br> 
    * 
    * @throws ServletException if an error occure 
    */ 
    public void init(ServletConfig sc) throws ServletException { 
     BirtEngine.initBirtConfig(); 
     this.birtReportEngine = BirtEngine.getBirtEngine(sc.getServletContext()); 
    } 
} 

birtconfigproperty：

ogDirectory=c:/temp 
logLevel=FINEST