jasperreports+ireport嵌套问题

Question

求取jsp中调用.jasper文件代码

Answer 1

可以参考jasperreport src的demo，webapp中的程序，里面包括jsp调用、servlet调用，applet调用

Answer 2

<%@ page contentType="text/html; charset=gb2312"%>
<%@ page import="javax.naming.Context"%>
<%@ page import="javax.sql.DataSource"%>
<%@ page import="javax.naming.InitialContext"%>
<%@ page import="java.sql.*"%>
<%@ page import="javax.sql.*"%><%@ page errorPage="error.jsp" %>
<%@ page import="net.sf.jasperreports.engine.*" %>
<%@ page import="net.sf.jasperreports.engine.util.*" %>
<%@ page import="net.sf.jasperreports.engine.export.*" %>
<%@ page import="net.sf.jasperreports.j2ee.servlets.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%
   Connection conn;
   try{
       Context initCtx = new InitialContext();
       Context envCtx=(Context) initCtx.lookup("java:comp/env");
       //从Context中lookup数据源
       ds=(DataSource)envCtx.lookup("DbConn");
       conn=ds.getConnection();
            }catch(Exception ne){
               out.println(ne);
           }
File reportFile = new File(application.getRealPath("/reports/classic.jasper"));
    if (!reportFile.exists())
throw new JRRuntimeException("File Test.jasper not found. The report design must be compiled first."); JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath()); Map parameters = new HashMap();
parameters.put("ReportTitle", "Address Report");
parameters.put("BaseDir", reportFile.getParentFile()); JasperPrint jasperPrint =
JasperFillManager.fillReport(
jasperReport,
parameters,
conn
); JRHtmlExporter exporter = new JRHtmlExporter(); StringBuffer sbuffer = new StringBuffer(); session.setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint); exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);
exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, "../servlets/image?image="); exporter.exportReport();       conn.close();%>
"DbConn"是数据源的名字，
"/reports/classic.jasper"这个路径一定要正确