ireport输出报表

1）用ireport创建完成jrxml文件后，到ireport的安装目录找到相应的jasper文件，然后放到项目的一个目录中。（由于让程序每次都编译jrxml很浪费时间，再说模板也不容易改变，建议只编译一次就OK）

2）使用代码如下

Session session = HibernateUtil.currentSession();
   Connection con = session.connection();    //得到链接
   Statement stmt = con.createStatement();
   ResultSet rs = stmt.executeQuery("select * from applications_list where app_id='" +appId+"'");    //用数据集传入带参数的SQL语句
   System.out.println("select * from applications_list where appl_list_id='" +appId+"'");
   String appPath = request.getSession().getServletContext().getRealPath("/");    //得到以便于好的jasper文件
   if (appPath.lastIndexOf("//") != appPath.length() - 1)appPath += "//";
   String reportFileName = appPath+ "jasper//untitled_report_1.jasper";
   Map parameters = new HashMap();
   parameters.put("Title", "设备申请列表");//注意可以有很多个参数
   JasperPrint jasperPrint = JasperFillManager.fillReport(reportFileName, parameters, new JRResultSetDataSource(rs));
   JRRtfExporter exporter = null;
   exporter = new JRRtfExporter();
   response.setContentType("text/html; charset=UTF-8");
   response.setContentType("application/msword");
   String applicatiosname = ToUTF8.toUtf8String("设备申请单");    //处理下载后文件名中文问题
   response.setHeader("Content-disposition","attachment;filename="+applicatiosname+".doc");
   exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING, "UTF-8");
   exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
   exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, response.getOutputStream());
   exporter.exportReport();