iReport和jsp问题，主要是报表打印方面的，那位遇到过，帮帮忙啊

try {
      File rpt = new File(application.getRealPath("/ord/rpt/orderinfor.jasper"));
      Class.forName(driver);
      JasperReport jasperReport = (JasperReport) JRLoader.loadObject(rpt);
      con = DriverManager.getConnection(url, "xzs_network", "xzs");
      stmt = con.createStatement();
      rs = stmt.executeQuery(sql);
      if (!rs.next())
        return;
      jrds = new JRResultSetDataSource(rs);
      jasperPrint =
          JasperFillManager.fillReport(
          jasperReport,
          reportParams,
          jrds
          );
      JasperPrintManager.printReportToXmlStream(jasperPrint,response.getOutputStream());
      response.getOutputStream().flush();
      response.getOutputStream().close();
------------------------------------------------------------------------
抛出异常如下：
java.lang.IllegalStateException: getOutputStream() has already been called for this response

java.lang.IllegalStateException: getOutputStream() has already been called for this response
怎么解决呢？

7 个解决方案

#1

意思是输出流已经被打开，不允许操作了，怎么回这样呢？

#2

ServletOutputStream output = response.getOutputStream();
JasperPrintManager.printReportToXmlStream(jasperPrint,output);
output .flush();
output .close();

#3

可以try try.

http://www.javatoolsoft.com JavaCellReport
一个完全用java写出的Excel，同时支持数据帮定和Web浏览和打印.

#4

帮忙顶

#5

#6

up!
up!

#7

我也遇到这样的情况，删除掉页面上面的<%@ page contentType="application/pdf;charset=GB2312" %>

#1