javamailframe.java

使用JavaMail开发的具有发送、接收邮件的应用

        msgDlg.setVisible(true);
    }
}//GEN-LAST:event_jTable1MouseClicked

    private void addToTable(final MimeMessage message) {
        try {

            InMessage inMsg = new InMessage();
            getMailContent(message, inMsg);
            inMsg.UID = folder.getUID(message);
            inMsg.send = getFrom(message);
            inMsg.subject = getSubject(message);
            inMsg.sentDate = getSentDate(message);
            inMsg.size = getSize(message);
            inMsg.to = getTo(message);

            inMsgs.add(inMsg);
            UIDs.add(inMsg.UID);
            
            ImageIcon ico = null;
            if (inMsg.attaches != null && inMsg.attaches.size() > 0)
                ico = attachIco;
            ((DefaultTableModel) jTable1.getModel()).addRow(new Object[]{inMsg.send, inMsg.subject, inMsg.sentDate, inMsg.size, inMsg, ico});
        } catch (Exception ex) {
            Logger.getLogger(JavaMailFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
    　　*　解析邮件，把得到的邮件内容保存到一个StringBuffer对象中，解析邮件
    　　*　主要是根据MimeType类型的不同执行不同的操作，一步一步的解析
    　　*/
    public void getMailContent(Part part, InMessage inMsg) throws Exception {
        String contentType = part.getContentType();
//        //获得邮件的MimeType类型
//        System.out.println("邮件的MimeType类型: " + contentType);

        int nameIndex = contentType.indexOf("name");

        boolean conName = false;

        if (nameIndex != -1) {
            conName = true;
        }

        if (part.isMimeType("text/plain") && conName == false) {
            // text/plain 类型
            inMsg.contentText = (String) part.getContent();
        } else if (part.isMimeType("text/html") && conName == false) {
            // text/html 类型
            handleHtml(part, inMsg);

        } else if (part.isMimeType("multipart/*")) {
            // multipart/*
            Multipart multipart = (Multipart) part.getContent();
            int counts = multipart.getCount();
            for (int i = 0; i < counts; i++) {
                getMailContent(multipart.getBodyPart(i), inMsg);
            }
        } else if (part.isMimeType("message/rfc822")) {
            // message/rfc822
            getMailContent((Part) part.getContent(), inMsg);
        } else if (conName) {
            String disposition = part.getDisposition();
            if ((disposition != null) && (disposition.equals(Part.ATTACHMENT) || disposition.equals(Part.INLINE))) {
                saveAttach(part, inMsg);
            }
        }
    }

    //处理Html文件
    public void handleHtml(Part msg, InMessage inMsg) throws Exception {
        String content = (String) msg.getContent();
        String filename = "mail/" + (int) (Math.random() * 1000000000 + 1) + ".html";
        try {
            FileOutputStream out = new FileOutputStream(filename);
            PrintStream p = new PrintStream(out);
            p.println(content);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        File file = new File(filename);
        String str = file.getAbsolutePath();
        inMsg.html = str;
    }

    private void saveAttach(Part part, InMessage inMsg) throws Exception {
        //文件名一般都经过了base64编码,下面是解码
        String fileName = decodeHeader(part.getFileName());
        System.out.println("有附件:" + fileName);

        InputStream in = part.getInputStream();
        FileOutputStream writer = new FileOutputStream(new File("mail/" + fileName));
        byte[] content = new byte[255];
        int read;
        while ((read = in.read(content)) != -1) {
            writer.write(content);
        }
        writer.close();
        in.close();
        
        if (inMsg.attaches == null)
            inMsg.attaches = new ArrayList<String>();
        inMsg.attaches.add(fileName);
    }

    /**
    　*　获得发件人的地址和姓名
    　*/
    public static String getFrom(Message msg) {
        String from = "";
        try {
            if (msg.getFrom()[0] != null) {
                from = msg.getFrom()[0].toString();
            }
            from = decodeHeader(from);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return from;
    }

    /**
     *  获得收件人的地址和姓名
     */
    public static String getTo(Message msg) {
        String to = "";
        try {
            if (msg.getRecipients(Message.RecipientType.TO) != null) { 
                for (Address rec : msg.getRecipients(Message.RecipientType.TO))
                    to += decodeHeader(rec.toString()) + ";";
            }
        } catch (Exception ex) {
            Logger.getLogger(JavaMailFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        return to;
    }
    
    private static String toChinese(String strvalue) {
        try {
            if (strvalue == null) {
                return null;
            } else {
                strvalue = new String(strvalue.getBytes("ISO8859_1"), "GBK");
                return strvalue;
            }

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }

    public static String decodeHeader(String value) throws UnsupportedEncodingException {
        if (value.startsWith("=?GB") || value.startsWith("=?gb") || value.startsWith("=?utf-8") || value.startsWith("=?UTF-8")) {
            value = MimeUtility.decodeText(value);
        }
        else {
            value = toChinese(value);
        }
        return value;
    }

    /**
    　*　获得邮件主题
    　*/
    public static String getSubject(Message mimeMessage) {
        String subject = "";
        try {
//            subject = mimeMessage.getSubject();  //getSubject方法已执行了decode的，正确decode完的字符串执行"ISO8859_1"转"GBK反而会乱码;
            if (mimeMessage.getHeader("subject") != null)
                subject = mimeMessage.getHeader("subject")[0];

            if (subject == null) {
                subject = "";
            } else {
                subject = decodeHeader(subject);
            }
        } catch (Exception ex) {
            Logger.getLogger(JavaMailFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        return subject;

    }

    /**
    　*　获得邮件发送日期
    　*/
    public static String getSentDate(Message mimeMessage) {
        String strSentDate = "";
        try {
            Date sentDate = mimeMessage.getSentDate();
            if (sentDate == null) {
                sentDate = new Date();
            }
            SimpleDateFormat format = new SimpleDateFormat("yy年MM月dd日　HH:mm");
            strSentDate =
                    format.format(sentDate);

        } catch (MessagingException ex) {
            Logger.getLogger(JavaMailFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        return strSentDate;
    }

    public String getSize(Message mimeMessage) {
        try {
            return (mimeMessage.getSize() + 1000) / 1000 + "K";
        } catch (MessagingException ex) {
            Logger.getLogger(JavaMailFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        return "";
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btnRecv;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    private javax.swing.JToolBar jToolBar1;
    // End of variables declaration//GEN-END:variables
}