JasperReport學習筆記7-導出成其它格式(pdf,xls,html)

JasperReport還可以導出爲其它格式，如PDF，XLS，RTF，HTML，CSV 
下面是導出爲PDF和XLS文件

Class.forName("com.mysql.jdbc.Driver");
        Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/jasperreportdb","root","root");
        try {
            //據據jasper文件生成JasperPrint對象
            JasperPrint jasperPrint = JasperFillManager.fillReport("WebRoot//JasperFile//report9.jasper", new HashMap(),connection);
            //生成我們的導出類JRPdfExporter 來自JRExporter
            JRPdfExporter jrpdfExporter = new JRPdfExporter();
            //設JasperPrint參數
            jrpdfExporter.setParameter(JRExporterParameter.JASPER_PRINT,jasperPrint);
            //設置輸入的PDF文件放在什麼地方
            jrpdfExporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, "WebRoot//JasperFile//exporter.pdf");
            //輸出
            jrpdfExporter.exportReport();

            //Excel  JExcelApiExporter 來自JRExporter
            JExcelApiExporter xlsExporter = new JExcelApiExporter();
            xlsExporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
            xlsExporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME,"WebRoot//JasperFile//exporter.xls");
            xlsExporter.exportReport();
        } catch (JRException e) {
            e.printStackTrace();
        }

在WEB上面生成HTML的報表 

public class HtmlReportServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            //連結數據庫
            Class.forName("com.mysql.jdbc.Driver");
            Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/jasperreportdb","root","root");
            //獲得Jasper輸入流
            InputStream inputStream = getServletConfig().getServletContext().getResourceAsStream("JasperFile//report9.jasper");
            //獲得JasperPrint對象
            JasperPrint jasperPrint = JasperFillManager.fillReport(inputStream, new HashMap(),connection);
            connection.close();
            //設置格式
            response.setContentType("text/html");
            //獲得輸出流 ,這裏不能這樣response.getOutputStream()
            PrintWriter printWriter = response.getWriter();
            //創建JRHtmlExporter對象
            JRHtmlExporter htmlExporter = new JRHtmlExporter();
            //把jasperPrint到Session裏面(net.sf.jasperreports.j2ee.jasper_print)
            request.getSession().setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint);
            //設值jasperPrint
            htmlExporter.setParameter(JRExporterParameter.JASPER_PRINT,jasperPrint);
            //設置輸出
            htmlExporter.setParameter(JRExporterParameter.OUTPUT_WRITER,printWriter);
            //設置圖片生成的Servlet(生成圖片就用這個ImageServlet,並且要在XML文件裏面配置 image?image=這個是Servlet的url-pattern)
            htmlExporter.setParameter(JRHtmlExporterParameter.IMAGES_URI,"image?image=");
            //導出
            htmlExporter.exportReport();
            printWriter.close();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (JRException e) {
            e.printStackTrace();
        }
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doGet(request, response);
    }

}

注意：這個因爲用到了JasperReport裏面的一個Servlet要在web.xml文件裏配置好

<servlet>
    <servlet-name>HtmlReportServlet</servlet-name>
    <servlet-class>com.langhua.JasperReport.Servlet.HtmlReportServlet</servlet-class>
  </servlet>
  <servlet>
  <servlet-name>ImageServlet</servlet-name>
    <servlet-class>net.sf.jasperreports.j2ee.servlets.ImageServlet</servlet-class>
  </servlet>
<!--url-pattern視你的情況而定，如果圖片出不來，你就看他的連結是什麼 -->
<servlet-mapping>
    <servlet-name>ImageServlet</servlet-name>
    <url-pattern>/servlet/image</url-pattern>
  </servlet-mapping>

轉載自：http://langhua9527.iteye.com/blog/403478