JasperReport学习笔记7-导出成其它格式(pdf,xls,html)

JasperReport还可以导出为其它格式，如PDF，XLS，RTF，HTML，CSV 
下面是导出为PDF和XLS文件

Class.forName("com.mysql.jdbc.Driver");
        Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/jasperreportdb","root","root");
        try {
            //据据jasper文件生成JasperPrint对象
            JasperPrint jasperPrint = JasperFillManager.fillReport("WebRoot//JasperFile//report9.jasper", new HashMap(),connection);
            //生成我们的导出类JRPdfExporter 来自JRExporter
            JRPdfExporter jrpdfExporter = new JRPdfExporter();
            //设JasperPrint参数
            jrpdfExporter.setParameter(JRExporterParameter.JASPER_PRINT,jasperPrint);
            //设置输入的PDF文件放在什么地方
            jrpdfExporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, "WebRoot//JasperFile//exporter.pdf");
            //输出
            jrpdfExporter.exportReport();

            //Excel  JExcelApiExporter 来自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的报表 

public class HtmlReportServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            //连结数据库
            Class.forName("com.mysql.jdbc.Driver");
            Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/jasperreportdb","root","root");
            //获得Jasper输入流
            InputStream inputStream = getServletConfig().getServletContext().getResourceAsStream("JasperFile//report9.jasper");
            //获得JasperPrint对象
            JasperPrint jasperPrint = JasperFillManager.fillReport(inputStream, new HashMap(),connection);
            connection.close();
            //设置格式
            response.setContentType("text/html");
            //获得输出流 ,这里不能这样response.getOutputStream()
            PrintWriter printWriter = response.getWriter();
            //创建JRHtmlExporter对象
            JRHtmlExporter htmlExporter = new JRHtmlExporter();
            //把jasperPrint到Session里面(net.sf.jasperreports.j2ee.jasper_print)
            request.getSession().setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint);
            //设值jasperPrint
            htmlExporter.setParameter(JRExporterParameter.JASPER_PRINT,jasperPrint);
            //设置输出
            htmlExporter.setParameter(JRExporterParameter.OUTPUT_WRITER,printWriter);
            //设置图片生成的Servlet(生成图片就用这个ImageServlet,并且要在XML文件里面配置 image?image=这个是Servlet的url-pattern)
            htmlExporter.setParameter(JRHtmlExporterParameter.IMAGES_URI,"image?image=");
            //导出
            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：这个因为用到了JasperReport里面的一个Servlet要在web.xml文件里配置好

<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视你的情况而定，如果图片出不来，你就看他的连结是什么 -->
<servlet-mapping>
    <servlet-name>ImageServlet</servlet-name>
    <url-pattern>/servlet/image</url-pattern>
  </servlet-mapping>

转载自：http://langhua9527.iteye.com/blog/403478