android pop3与imap方式接收邮件（javamail）

需要下载3个jar包：mail.jar/    activation.jar/    additionnal.jar

1.pop3

	/**
	 * 以pop3方式读取邮件，此方法不能读取邮件是否为已读，已经通过测试
	 * */
	private void getEmail() {
		List> list = new ArrayList>();

		try {
			Properties props = System.getProperties();
			props.put("mail.smtp.host", "smtp.163.com");
			props.put("mail.smtp.auth", "true");
			Session session = Session.getDefaultInstance(props, null);
			URLName urln = new URLName("pop3", "pop3.163.com", 110, null,
					"邮箱名（没有@163.com）", "密码");
			// 邮件协议为pop3，邮件服务器是pop3.163.com，端口为110，用户名/密码为abcw111222/123456w
			Store store = session.getStore(urln);
			store.connect();
			Folder folder = store.getFolder("INBOX");
			folder.open(Folder.READ_WRITE);
			Message message[] = folder.getMessages();
			if (message.length > 0) {
				Map map;
				System.out.println("Messages's length: " + message.length);
				ReciveOneMail pmm = null;
				for (int i = 0; i < message.length; i++) {
					System.out.println("======================");
					pmm = new ReciveOneMail((MimeMessage) message[i]);
					System.out.println("Message " + i + " subject: "
							+ pmm.getSubject());
					System.out.println("Message " + i + " sentdate: "
							+ pmm.getSentDate());
					System.out.println("Message " + i + " replysign: "
							+ pmm.getReplySign());

					boolean isRead = pmm.isNew();// 判断邮件是否为已读
					System.out.println("Message " + i + " hasRead: " + isRead);
					System.out.println("Message " + i + "  containAttachment: "
							+ pmm.isContainAttach((Part) message[i]));
					System.out.println("Message " + i + " form: "
							+ pmm.getFrom());
					System.out.println("Message " + i + " to: "
							+ pmm.getMailAddress("to"));
					System.out.println("Message " + i + " cc: "
							+ pmm.getMailAddress("cc"));
					System.out.println("Message " + i + " bcc: "
							+ pmm.getMailAddress("bcc"));
					pmm.setDateFormat("yy年MM月dd日 HH:mm");
					System.out.println("Message " + i + " sentdate: "
							+ pmm.getSentDate());
					System.out.println("Message " + i + " Message-ID: "
							+ pmm.getMessageId());
					// 获得邮件内容===============
					pmm.getMailContent((Part) message[i]);
					System.out.println("Message " + i + " bodycontent: \r\n"
							+ pmm.getBodyText());
					String file_path = File.separator + "mnt" + File.separator
							+ "sdcard" + File.separator;
					System.out.println(file_path);
					pmm.setAttachPath(file_path);
					pmm.saveAttachMent((Part) message[i]);

					map = new HashMap();
					map.put("from", pmm.getFrom());
					map.put("title", pmm.getSubject());
					map.put("time", pmm.getSentDate());
					map.put("read", isRead);
					list.add(map);
				}
				SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,
						list, R.layout.item_receiveemail, new String[] {
								"from", "title", "time", "read" }, new int[] {
								R.id.item_receive_sendname,
								R.id.item_receive_title,
								R.id.item_receive_sendtime,
								R.id.item_receive_read });
				lv.setAdapter(adapter);

			} else {
				Toast.makeText(MainActivity.this, "没有邮件", Toast.LENGTH_SHORT)
						.show();
			}
		} catch (NoSuchProviderException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (MessagingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

2.imap方式

	/**
	 * 以imap方式读取邮件，可以判定读取邮件是否为已读
	 * */
	private void getImapEmail() {
		String user = "[email protected]";// 邮箱的用户名
		String password = "123456w"; // 邮箱的密码

		Properties prop = System.getProperties();
		prop.put("mail.store.protocol", "imap");
		prop.put("mail.imap.host", "imap.163.com");

		Session session = Session.getInstance(prop);

		int total = 0;
		IMAPStore store;
		try {
			store = (IMAPStore) session.getStore("imap"); // 使用imap会话机制，连接服务器

			store.connect(user, password);

			IMAPFolder folder = (IMAPFolder) store.getFolder("INBOX"); // 收件箱
			folder.open(Folder.READ_WRITE);
			// 获取总邮件数
			total = folder.getMessageCount();
			System.out.println("---共有邮件：" + total + " 封---");
			// 得到收件箱文件夹信息，获取邮件列表
			List> list = new ArrayList>();
			System.out.println("未读邮件数：" + folder.getUnreadMessageCount());
			Message[] messages = folder.getMessages();
			if (messages.length > 0) {
				Map map;
				System.out.println("Messages's length: " + messages.length);
				ReciveOneMail pmm = null;
				for (int i = 0; i < messages.length; i++) {
					System.out.println("======================");
					pmm = new ReciveOneMail((MimeMessage) messages[i]);
					System.out.println("Message " + i + " subject: "
							+ pmm.getSubject());
					try {
						System.out.println("Message " + i + " sentdate: "
								+ pmm.getSentDate());
						System.out.println("Message " + i + " replysign: "
								+ pmm.getReplySign());

						boolean isRead;// 用来判断该邮件是否为已读
						String read;
						Flags flags = messages[i].getFlags();
						if (flags.contains(Flags.Flag.SEEN)) {
							System.out.println("这是一封已读邮件");
							isRead = true;
							read = "已读";
						} else {
							System.out.println("未读邮件");
							isRead = false;
							read = "未读";
						}
						System.out.println("Message " + i + " hasRead: "
								+ isRead);
						System.out.println("Message " + i
								+ "  containAttachment: "
								+ pmm.isContainAttach((Part) messages[i]));
						System.out.println("Message " + i + " form: "
								+ pmm.getFrom());
						System.out.println("Message " + i + " to: "
								+ pmm.getMailAddress("to"));
						System.out.println("Message " + i + " cc: "
								+ pmm.getMailAddress("cc"));
						System.out.println("Message " + i + " bcc: "
								+ pmm.getMailAddress("bcc"));
						pmm.setDateFormat("yy年MM月dd日 HH:mm");
						System.out.println("Message " + i + " sentdate: "
								+ pmm.getSentDate());
						System.out.println("Message " + i + " Message-ID: "
								+ pmm.getMessageId());
						// 获得邮件内容===============
						pmm.getMailContent((Part) messages[i]);
						System.out.println("Message " + i
								+ " bodycontent: \r\n" + pmm.getBodyText());
						String file_path = File.separator + "mnt"
								+ File.separator + "sdcard" + File.separator;
						System.out.println(file_path);
						pmm.setAttachPath(file_path);
						pmm.saveAttachMent((Part) messages[i]);

						map = new HashMap();
						map.put("from", pmm.getFrom());
						map.put("title", pmm.getSubject());
						map.put("time", pmm.getSentDate());
						map.put("read", read);
						list.add(map);
					} catch (Exception e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}

				}
				SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,
						list, R.layout.item_receiveemail, new String[] {
								"from", "title", "time", "read" }, new int[] {
								R.id.item_receive_sendname,
								R.id.item_receive_title,
								R.id.item_receive_sendtime,
								R.id.item_receive_read });
				lv.setAdapter(adapter);
			}
		} catch (javax.mail.NoSuchProviderException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (MessagingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

下面为用到的一个类，用来读取除了判断是否已读的信息之外的内容

/**
 * 接收邮箱中的邮件，可以接收带附件的
 * （目前接收的邮件中含有中文内容，会出现乱码，但是标题不会乱码）
 * 邮件中的内容如果用专门的阅读器也不会出现乱码现象，图片等都可以下载
 * */
@SuppressLint("DefaultLocale")
public class ReciveOneMail {

	private MimeMessage mimeMessage = null;
	private String saveAttachPath = ""; // 附件下载后的存放目录
	private StringBuffer bodytext = new StringBuffer();// 存放邮件内容
	private String dateformat = "yy-MM-dd HH:mm"; // 默认的日前显示格式

	public ReciveOneMail(MimeMessage mimeMessage) {
		this.mimeMessage = mimeMessage;
	}

	public void setMimeMessage(MimeMessage mimeMessage) {
		this.mimeMessage = mimeMessage;
	}

	/**
	 * 获得发件人的地址和姓名
	 */
	public String getFrom() throws Exception {
		InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();
		String from = address[0].getAddress();
		if (from == null)
			from = "";
		String personal = address[0].getPersonal();
		if (personal == null)
			personal = "";
		String fromaddr = personal + "<" + from + ">";
		return fromaddr;
	}

	/**
	 * 获得邮件的收件人，抄送，和密送的地址和姓名，根据所传递的参数的不同 "to"----收件人 "cc"---抄送人地址 "bcc"---密送人地址
	 */
	@SuppressLint("DefaultLocale")
	public String getMailAddress(String type) throws Exception {
		String mailaddr = "";
		String addtype = type.toUpperCase();
		InternetAddress[] address = null;
		if (addtype.equals("TO") || addtype.equals("CC")
				|| addtype.equals("BCC")) {
			if (addtype.equals("TO")) {
				address = (InternetAddress[]) mimeMessage
						.getRecipients(Message.RecipientType.TO);
			} else if (addtype.equals("CC")) {
				address = (InternetAddress[]) mimeMessage
						.getRecipients(Message.RecipientType.CC);
			} else {
				address = (InternetAddress[]) mimeMessage
						.getRecipients(Message.RecipientType.BCC);
			}
			if (address != null) {
				for (int i = 0; i < address.length; i++) {
					String email = address[i].getAddress();
					if (email == null)
						email = "";
					else {
						email = MimeUtility.decodeText(email);
					}
					String personal = address[i].getPersonal();
					if (personal == null)
						personal = "";
					else {
						personal = MimeUtility.decodeText(personal);
					}
					String compositeto = personal + "<" + email + ">";
					mailaddr += "," + compositeto;
				}
				mailaddr = mailaddr.substring(1);
			}
		} else {
			throw new Exception("Error emailaddr type!");
		}
		return mailaddr;
	}

	/**
	 * 获得邮件主题
	 */
	public String getSubject() throws MessagingException {
		String subject = "";
		try {
			subject = MimeUtility.decodeText(mimeMessage.getSubject());
			if (subject == null)
				subject = "";
		} catch (Exception exce) {
		}
		return subject;
	}

	/**
	 * 获得邮件发送日期
	 */
	@SuppressLint("SimpleDateFormat")
	public String getSentDate() throws Exception {
		Date sentdate = mimeMessage.getSentDate();
		SimpleDateFormat format = new SimpleDateFormat(dateformat);
		return format.format(sentdate);
	}

	/**
	 * 获得邮件正文内容
	 */
	public String getBodyText() {
		return bodytext.toString();
	}

	/**
	 * 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) throws Exception {
		String contenttype = part.getContentType();
		int nameindex = contenttype.indexOf("name");
		boolean conname = false;
		if (nameindex != -1)
			conname = true;
		System.out.println("CONTENTTYPE: " + contenttype);
		if (part.isMimeType("text/plain") && !conname) {
			bodytext.append((String) part.getContent());
		} else if (part.isMimeType("text/html") && !conname) {
			bodytext.append((String) part.getContent());
		} else if (part.isMimeType("multipart/*")) {
			Multipart multipart = (Multipart) part.getContent();
			int counts = multipart.getCount();
			for (int i = 0; i < counts; i++) {
				getMailContent(multipart.getBodyPart(i));
			}
		} else if (part.isMimeType("message/rfc822")) {
			getMailContent((Part) part.getContent());
		} else {
		}
	}

	/**
	 * 判断此邮件是否需要回执，如果需要回执返回"true",否则返回"false"
	 */
	public boolean getReplySign() throws MessagingException {
		boolean replysign = false;
		String needreply[] = mimeMessage
				.getHeader("Disposition-Notification-To");
		if (needreply != null) {
			replysign = true;
		}
		return replysign;
	}

	/**
	 * 获得此邮件的Message-ID
	 */
	public String getMessageId() throws MessagingException {
		return mimeMessage.getMessageID();
	}

	/**
	 * 【判断此邮件是否已读，如果未读返回返回false,反之返回true】pop3协议使用时不能判断。
	 */
	public boolean isNew() throws MessagingException {
		boolean isnew = false;//由于isnew设为false所以每次显示的都为未读
		Flags flags = ((Message) mimeMessage).getFlags();
		System.out.println("--------flags-------" + flags);
		Flags.Flag[] flag = flags.getSystemFlags();
		System.out.println("----flag----" + flag);
		System.out.println("flags's length: " + flag.length);
		for (int i = 0; i < flag.length; i++) {
			System.out.println("flag=======" + flag[i]);
			System.out.println("-=-=-=Flags.Flag.SEEN=-=-=-="+Flags.Flag.SEEN);
			if (flag[i] == Flags.Flag.SEEN) {
				isnew = true;
				System.out.println("seen Message.......");
				break;
			}
		}
		return isnew;
	}

	/**
	 * 判断此邮件是否包含附件
	 */
	@SuppressLint("DefaultLocale")
	public boolean isContainAttach(Part part) throws Exception {
		boolean attachflag = false;
		// String contentType = part.getContentType();
		if (part.isMimeType("multipart/*")) {
			Multipart mp = (Multipart) part.getContent();
			for (int i = 0; i < mp.getCount(); i++) {
				BodyPart mpart = mp.getBodyPart(i);
				String disposition = mpart.getDisposition();
				if ((disposition != null)
						&& ((disposition.equals(Part.ATTACHMENT)) || (disposition
								.equals(Part.INLINE))))
					attachflag = true;
				else if (mpart.isMimeType("multipart/*")) {
					attachflag = isContainAttach((Part) mpart);
				} else {
					String contype = mpart.getContentType();
					if (contype.toLowerCase().indexOf("application") != -1)
						attachflag = true;
					if (contype.toLowerCase().indexOf("name") != -1)
						attachflag = true;
				}
			}
		} else if (part.isMimeType("message/rfc822")) {
			attachflag = isContainAttach((Part) part.getContent());
		}
		return attachflag;
	}

	/**
	 * 【保存附件】
	 */
	@SuppressLint("DefaultLocale")
	public void saveAttachMent(Part part) throws Exception {
		String fileName = "";
		if (part.isMimeType("multipart/*")) {
			Multipart mp = (Multipart) part.getContent();
			for (int i = 0; i < mp.getCount(); i++) {
				BodyPart mpart = mp.getBodyPart(i);//主体部分得到处理
				String disposition = mpart.getDisposition();
				if ((disposition != null)
						&& ((disposition.equals(Part.ATTACHMENT)) || (disposition
								.equals(Part.INLINE)))) {//ATTACHMENT附件，INLINE嵌入
					fileName = mpart.getFileName();
					if (fileName.toLowerCase().indexOf("gb18030") != -1) {
						fileName = MimeUtility.decodeText(fileName);
					}
					saveFile(fileName, mpart.getInputStream());
				} else if (mpart.isMimeType("multipart/*")) {
					saveAttachMent(mpart);
				} else {
					fileName = mpart.getFileName();
					if ((fileName != null)
							&& (fileName.toLowerCase().indexOf("GB18030") != -1)) {
						fileName = MimeUtility.decodeText(fileName);
						saveFile(fileName, mpart.getInputStream());
					}
				}
			}
		} else if (part.isMimeType("message/rfc822")) {
			saveAttachMent((Part) part.getContent());
		}
	}

	/**
	 * 【设置附件存放路径】
	 */

	public void setAttachPath(String attachpath) {
		this.saveAttachPath = attachpath;
	}

	/**
	 * 【设置日期显示格式】
	 */
	public void setDateFormat(String format) throws Exception {
		this.dateformat = format;
	}

	/**
	 * 【获得附件存放路径】
	 */
	public String getAttachPath() {
		return saveAttachPath;
	}

	/**
	 * 【真正的保存附件到指定目录里】
	 */
	@SuppressLint("DefaultLocale")
	private void saveFile(String fileName, InputStream in) throws Exception {
		String osName = System.getProperty("os.name");
		System.out.println("----fileName----" + fileName);
		// String storedir = getAttachPath();
//		String separator = "";
		if (osName == null)
			osName = "";
		File storefile = new File(File.separator + "mnt" + File.separator
				+ "sdcard" + File.separator + fileName);

		storefile.createNewFile();
		System.out.println("storefile's path: " + storefile.toString());
//		 for(int i=0;storefile.exists();i++){
//		 storefile = new File(storedir+separator+fileName+i);
//		 }

		BufferedOutputStream bos = null;
		BufferedInputStream bis = null;
		try {
			bos = new BufferedOutputStream(new FileOutputStream(storefile));
			bis = new BufferedInputStream(in);
			int c;
			while ((c = bis.read()) != -1) {
				bos.write(c);
				bos.flush();
			}
		} catch (Exception exception) {
			exception.printStackTrace();
			throw new Exception("文件保存失败!");
		} finally {
			bos.close();
			bis.close();
		}
	}
}