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
/** * 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();}}}