Message.RecipientType.TO 收件人
+ *Message.RecipientType.CC 抄送
+ *Message.RecipientType.BCC 密送
+ * + * @param msg 邮件内容 + * @param type 收件人类型 + * @return 收件人1 <邮件地址1>, 收件人2 <邮件地址2>, ... + * @throws MessagingException + */ + public static String getReceiveAddress(MimeMessage msg, Message.RecipientType type) throws MessagingException { + StringBuffer receiveAddress = new StringBuffer(); + Address[] addresss = null; + if (type == null) { + addresss = msg.getAllRecipients(); + } else { + addresss = msg.getRecipients(type); + } + + if (addresss == null || addresss.length < 1) + throw new MessagingException("没有收件人!"); + for (Address address : addresss) { + InternetAddress internetAddress = (InternetAddress) address; + receiveAddress.append(internetAddress.toUnicodeString()).append(","); + } + + receiveAddress.deleteCharAt(receiveAddress.length() - 1); //删除最后一个逗号 + + return receiveAddress.toString(); + } + + /** + * 获得邮件发送时间 + * + * @param msg 邮件内容 + * @return yyyy年mm月dd日 星期X HH:mm + * @throws MessagingException + */ + public static String getSentDate(MimeMessage msg, String pattern) throws MessagingException { + Date receivedDate = msg.getSentDate(); + if (receivedDate == null) + return ""; + + if (pattern == null || "".equals(pattern)) + pattern = "yyyy年MM月dd日 E HH:mm "; + + return new SimpleDateFormat(pattern).format(receivedDate); + } + + /** + * 判断邮件中是否包含附件 + *+ * //* @param msg 邮件内容 + * + * @return 邮件中存在附件返回true,不存在返回false + * @throws MessagingException + * @throws IOException + */ + public static boolean isContainAttachment(Part part) throws MessagingException, IOException { + boolean flag = false; + if (part.isMimeType("multipart/*")) { + MimeMultipart multipart = (MimeMultipart) part.getContent(); + int partCount = multipart.getCount(); + for (int i = 0; i < partCount; i++) { + BodyPart bodyPart = multipart.getBodyPart(i); + String disp = bodyPart.getDisposition(); + if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) { + flag = true; + } else if (bodyPart.isMimeType("multipart/*")) { + flag = isContainAttachment(bodyPart); + } else { + String contentType = bodyPart.getContentType(); + if (contentType.indexOf("application") != -1) { + flag = true; + } + + if (contentType.indexOf("name") != -1) { + flag = true; + } + } + + if (flag) break; + } + } else if (part.isMimeType("message/rfc822")) { + flag = isContainAttachment((Part) part.getContent()); + } + return flag; + } + + /** + * 判断邮件是否已读 + * + * @param msg 邮件内容 + * @return 如果邮件已读返回true, 否则返回false + * @throws MessagingException + */ + public static boolean isSeen(MimeMessage msg) throws MessagingException { + return msg.getFlags().contains(Flags.Flag.SEEN); + } + + /** + * 判断邮件是否需要阅读回执 + * + * @param msg 邮件内容 + * @return 需要回执返回true, 否则返回false + * @throws MessagingException + */ + public static boolean isReplySign(MimeMessage msg) throws MessagingException { + boolean replySign = false; + String[] headers = msg.getHeader("Disposition-Notification-To"); + if (headers != null) + replySign = true; + return replySign; + } + + /** + * 获得邮件的优先级 + * + * @param msg 邮件内容 + * @return 1(High):紧急 3:普通(Normal) 5:低(Low) + * @throws MessagingException + */ + public static String getPriority(MimeMessage msg) throws MessagingException { + String priority = "普通"; + String[] headers = msg.getHeader("X-Priority"); + if (headers != null) { + String headerPriority = headers[0]; + if (headerPriority.indexOf("1") != -1 || headerPriority.indexOf("High") != -1) + priority = "紧急"; + else if (headerPriority.indexOf("5") != -1 || headerPriority.indexOf("Low") != -1) + priority = "低"; + else + priority = "普通"; + } + return priority; + } + + /** + * 获得邮件文本内容 + * + * @param part 邮件体 + * @param content 存储邮件文本内容的字符串 + * @throws MessagingException + * @throws IOException + */ + public static void getMailTextContent(Part part, StringBuffer content) throws MessagingException, IOException { + //如果是文本类型的附件,通过getContent方法可以取到文本内容,但这不是我们需要的结果,所以在这里要做判断 + boolean isContainTextAttach = part.getContentType().indexOf("name") > 0; + if (part.isMimeType("text/*") && !isContainTextAttach) { + content.append(part.getContent().toString()); + } else if (part.isMimeType("message/rfc822")) { + getMailTextContent((Part) part.getContent(), content); + } else if (part.isMimeType("multipart/*")) { + Multipart multipart = (Multipart) part.getContent(); + int partCount = multipart.getCount(); + for (int i = 0; i < partCount; i++) { + BodyPart bodyPart = multipart.getBodyPart(i); + getMailTextContent(bodyPart, content); + } + } + } + + /** + * 保存附件 + * + * @param part 邮件中多个组合体中的其中一个组合体 + * @param destDir 附件保存目录 + * @throws UnsupportedEncodingException + * @throws MessagingException + * @throws FileNotFoundException + * @throws IOException + */ + public static void saveAttachment(Part part, String destDir) throws UnsupportedEncodingException, MessagingException, + FileNotFoundException, IOException { + if (part.isMimeType("multipart/*")) { + Multipart multipart = (Multipart) part.getContent(); //复杂体邮件 + //复杂体邮件包含多个邮件体 + int partCount = multipart.getCount(); + for (int i = 0; i < partCount; i++) { + //获得复杂体邮件中其中一个邮件体 + BodyPart bodyPart = multipart.getBodyPart(i); + //某一个邮件体也有可能是由多个邮件体组成的复杂体 + String disp = bodyPart.getDisposition(); + if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) { + InputStream is = bodyPart.getInputStream(); + saveFile(is, destDir, decodeText(bodyPart.getFileName())); + } else if (bodyPart.isMimeType("multipart/*")) { + saveAttachment(bodyPart, destDir); + } else { + String contentType = bodyPart.getContentType(); + if (contentType.indexOf("name") != -1 || contentType.indexOf("application") != -1) { + saveFile(bodyPart.getInputStream(), destDir, decodeText(bodyPart.getFileName())); + } + } + } + } else if (part.isMimeType("message/rfc822")) { + saveAttachment((Part) part.getContent(), destDir); + } + } + + /** + * 读取输入流中的数据保存至指定目录 + * + * @param is 输入流 + * @param fileName 文件名 + * @param destDir 文件存储目录 + * @throws FileNotFoundException + * @throws IOException + */ + private static void saveFile(InputStream is, String destDir, String fileName) + throws FileNotFoundException, IOException { + BufferedInputStream bis = new BufferedInputStream(is); + BufferedOutputStream bos = new BufferedOutputStream( + new FileOutputStream(new File(destDir + fileName))); + int len = -1; + while ((len = bis.read()) != -1) { + bos.write(len); + bos.flush(); + } + bos.close(); + bis.close(); + } + + /** + * 文本解码 + * + * @param encodeText 解码MimeUtility.encodeText(String text)方法编码后的文本 + * @return 解码后的文本 + * @throws UnsupportedEncodingException + */ + public static String decodeText(String encodeText) throws UnsupportedEncodingException { + if (encodeText == null || "".equals(encodeText)) { + return ""; + } else { + return MimeUtility.decodeText(encodeText); + } + } +}