java 获取邮件数据

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有时候我们需要去读取指定邮箱里面的邮件数据，这就需要使用到获取邮件的方法了

public static void main(String args[]) throws MessagingException,            IOException, javax.mail.MessagingException {    Properties props = new Properties();        props.setProperty("mail.store.protocol", "pop3");        props.setProperty("mail.pop3.host", "pop.163.com");        Session session = Session.getDefaultInstance(props);        Store store = session.getStore("pop3");        store.connect("******", "******");//邮箱帐号，邮箱的pop3/imap密码不是邮箱的登录密码        Folder folder = store.getFolder("INBOX");        folder.open(Folder.READ_WRITE);        // 全部邮件数        int messageCount = folder.getMessageCount();        System.out.println("邮件总数："+messageCount);        Message[] messages = folder.getMessages();        for (int i = 0; i < messages.length; i++) {            MimeMessage message = (MimeMessage) messages[i];            // 删除邮件            // message.setFlag(Flags.Flag.DELETED, true);            // 标记为已读            // message.setFlag(Flags.Flag.SEEN, true);            //pop3没有判断邮件是否为已读的功能，要使用Imap才可以            /*Flags flags = message.getFlags();            if (flags.contains(Flags.Flag.SEEN))                System.out.println("这是一封已读邮件");            else {                System.out.println("未读邮件");                message.setFlag(Flags.Flag.SEEN, true);            }*/            if(message.getFrom() == null)        continue;        javax.mail.Address addr = message.getFrom()[0];        if(addr == null)        continue;            String str_addr = addr.toString();            System.out.println("发件邮箱：" + str_addr.substring(str_addr.indexOf("<")+1, str_addr.indexOf(">")));            System.out.println("内容：" + message.getContent());            System.out.println("邮件ID：" + message.getMessageID());            //解析邮件内容            Object content = message.getContent();            if (content instanceof MimeMultipart) {                MimeMultipart multipart = (MimeMultipart) content;                parseMultipart(multipart);            }            System.out                    .println("========================================================");            System.out                    .println("========================================================");        }        folder.close(true);        store.close();    }

    public static void parseMultipart(Multipart multipart) throws MessagingException, IOException, javax.mail.MessagingException {        int count = multipart.getCount();        String html = null;        for (int idx=0;idx<count;idx++) {            BodyPart bodyPart = multipart.getBodyPart(idx);            if (bodyPart.isMimeType("text/plain")) {                html = (String) bodyPart.getContent();            } else if(bodyPart.isMimeType("text/html")) {     //           System.out.println("html..................."+bodyPart.getContent());                html = (String) bodyPart.getContent();            } else if(bodyPart.isMimeType("multipart/*")) {                Multipart mpart = (Multipart)bodyPart.getContent();                parseMultipart(mpart);            } else if (bodyPart.isMimeType("application/octet-stream")) {                System.out.println("application/octet-stream...");                String disposition = bodyPart.getDisposition();                System.out.println(disposition);                if (disposition.equalsIgnoreCase(BodyPart.ATTACHMENT)) {                    String fileName = bodyPart.getFileName();                    InputStream is = bodyPart.getInputStream();                    copy(is, new FileOutputStream("D:\\"+fileName));                }            }        }        if(html == null)        return ;        Document doc = Jsoup.parse(html);    }

通过parseMultipart解析函数也能看出来，我们获取到的邮件内容是一个html页面，至于还需要怎么去获取想要的数据、信息，这就用自己的方法咯

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