Question

因此，我正在尝试编写一个程序，将从我的电子邮件地址中抓取所有电子邮件并将其保存到文本文件中，我遇到的问题是使用Java Mail API抓取超过1封电子邮件。

这是我用来获取工作正常的电子邮件，但我希望收到收件箱中的每封电子邮件：

    public static void checkMail(String username, String password) {
    Properties props = new Properties();
    props.setProperty("mail.store.protocol", "imaps");
    try {
        Session session = Session.getInstance(props, null);
        Store store = session.getStore();
        store.connect("imap.gmail.com", username, password);
        Folder inbox = store.getFolder("INBOX");
        inbox.open(Folder.READ_ONLY);
        Message msg = inbox.getMessage(inbox.getMessageCount());
        Address[] in = msg.getFrom();
        for (Address address : in) {
            System.out.println("FROM:" + address.toString());
        }
        Multipart mp = (Multipart) msg.getContent();
        BodyPart bp = mp.getBodyPart(0);
        System.out.println("SENT DATE:" + msg.getSentDate());
        System.out.println("SUBJECT:" + msg.getSubject());
        System.out.println("CONTENT:" + bp.getContent());
    } catch (Exception mex) {
        mex.printStackTrace();
    }
}

如果有人可能告诉我如何做或解释它，那将非常感激。

Answer 1

如果您想要文件夹收件箱中的所有邮件，请执行以下操作：

public static void checkMail(String username, String password) {
    Properties props = new Properties();
    props.setProperty("mail.store.protocol", "imaps");
    try {
        Session session = Session.getInstance(props, null);
        Store store = session.getStore();
        store.connect("imap.gmail.com", username, password);
        Folder inbox = store.getFolder("INBOX");
        inbox.open(Folder.READ_ONLY);
        Message[] msgs = inbox.getMessages();

        for (Message msg : msgs) {
            try {
                Address[] in = msg.getFrom();
                for (Address address : in) {
                    System.out.println("FROM:" + address.toString());
                }
                Multipart mp = (Multipart) msg.getContent();
                BodyPart bp = mp.getBodyPart(0);
                System.out.println("SENT DATE:" + msg.getSentDate());
                System.out.println("SUBJECT:" + msg.getSubject());
                System.out.println("CONTENT:" + bp.getContent());
            } catch (Exception e) {

                e.printStackTrace();
            }
        }
        // close folder and store (normally in a finally block)
        inbox.close(false);
        store.close();

    } catch (Exception mex) {
        mex.printStackTrace();
    }
}

如果您想要来自其他文件夹的邮件，则必须对所有文件夹执行相同的操作。你可以使用store.getDefaultFolder（）。list（）获取它们（对所有文件夹执行此递归操作，因为文件夹可以包含子文件夹）

protected void recurseFolders(final Folder folder) {
    // folder can hold messages
    if ((folder.getType() & Folder.HOLDS_MESSAGES) != 0) {

        // process them

    }

    // folder can hold other folders
    if ((folder.getType() & Folder.HOLDS_FOLDERS) != 0) {
        for (final Folder subfolder : folder.list()) {

            // process them recursive
            recurseFolders(subfolder);

        }
    }

}

请看这里：https://github.com/salyh/elasticsearch-river-imap

使用Java Mail API从Gmail导出所有电子邮件

1 个答案: