spring,jasperreports发送报表邮件

前提：
1、版本要一致，偶这用的是jasperreports-4.1.2，iReport-4.1.1
2、编译好***.jasper
3、/html/image.jsp?image= 替换，是为了显示报表图片，之前用此jsp作为读取报表图片用。

public void process() {
        Connection conn = null;

        try { 
            //报表内嵌了SQL，只要传入参数，数据库连接即可。
            conn = dataSource.getConnection();          

            Map parameters = new HashMap();
            parameters.put("startTime", "20110101");
            parameters.put("endTime", "20111001");

            String jasperFile = "d://*****/" + "*****.jasper";

            File reportFile = new File(jasperFile);
            if (!reportFile.exists())
                throw new JRRuntimeException("File jasper not found. The report design must be compiled first.");

            JasperPrint jasperPrint =
                    JasperFillManager.fillReport(
                            jasperFile,
                            parameters,
                            conn
                    );

            JRHtmlExporter exporter = new JRHtmlExporter();
            exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
            ByteArrayOutputStream htmlOutputData = new ByteArrayOutputStream();
            exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, htmlOutputData);
            exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, imageUrl);
            exporter.setParameter(JRHtmlExporterParameter.IMAGES_DIR_NAME, imagePath);
            exporter.setParameter(JRHtmlExporterParameter.IS_OUTPUT_IMAGES_TO_DIR, true);
            exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN, false);
            exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING, "UTF-8");

            Map imageNameMap = new HashMap();
            exporter.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imageNameMap);
            exporter.exportReport();
            //attach the html data from htmlOutputData

            byte[] imageData = null;
            for (Iterator it = imageNameMap.entrySet().iterator(); it.hasNext(); ) {
                Map.Entry entry = (Map.Entry) it.next();
                String imageName = (String) entry.getKey();
                imageData = (byte[]) entry.getValue();
                //attach imageData using imageName as Content-ID
            }

          
            sendEmail(htmlOutputData.toByteArray(), imageData, imageNameMap);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (conn != null)
                    conn.close();
            } catch (Exception e) {
            }
        }
    }

public void sendEmail(final byte[] attachmentData, final byte[] imageData, final Map<String, byte[]> imageNameMap) throws MessagingException {       

        String host = "smtp.126.com";
        final String account = "****@126.com";
        final String toAddress = "****@163.com";
        String username = ""****@126.com";
        String password = "******";


        JavaMailSenderImpl sender = new JavaMailSenderImpl();

        sender.setHost(host);
        sender.setUsername(username);
        sender.setPassword(password);

        MimeMessagePreparator preparator = new MimeMessagePreparator() {

            public void prepare(MimeMessage mimeMessage) throws Exception {
                Multipart multipart = new MimeMultipart();

                MimeBodyPart htmlAttachment = new MimeBodyPart();
                String html = new String(attachmentData, "utf-8");
                for (String imageName : imageNameMap.keySet()) {
                    html = html.replace("/html/image.jsp?image=" + imageName, "cid:" + imageName);
                }
                htmlAttachment.setContent(html, "text/html;charset=\"utf-8\""); //
                multipart.addBodyPart(htmlAttachment);
                //当你有多个报表图片时
                for (String imageName : imageNameMap.keySet()) {
                    MimeBodyPart imagebody = new MimeBodyPart();
                    imagebody.setContent(imageData, "application/octet-stream");
                    imagebody.setHeader("Content-ID", "<" + imageName + ">");

                    multipart.addBodyPart(imagebody);
                }


                mimeMessage.setContent(multipart);

                mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(toAddress));
                mimeMessage.setFrom(new InternetAddress(account));

                mimeMessage.setSubject("test send jasperreports mail..");
            }
        };


        try {
            sender.send(preparator);
        } catch (MailException ex) {
            ex.printStackTrace();
        }

    }