使用IMAP从GMail获取邮件到Java应用程序

import java.util.Properties;
import javax.mail.Folder;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Store;

public class GMailIMAP {
    public static void main(String[] args) {
        // GMail IMAP服务器地址和端口
        String imapHost = "imap.gmail.com";
        int imapPort = 993;

        // GMail帐户用户名和密码
        String username = "your_email@gmail.com";
        String password = "your_password";

        try {
            // 设置邮件服务器属性
            Properties props = new Properties();
            props.put("mail.store.protocol", "imaps");

            // 获取邮件会话对象
            Session session = Session.getInstance(props);

            // 连接到IMAP服务器
            Store store = session.getStore();
            store.connect(imapHost, imapPort, username, password);

            // 打开收件箱
            Folder inbox = store.getFolder("INBOX");
            inbox.open(Folder.READ_ONLY);

            // 获取邮件总数
            int messageCount = inbox.getMessageCount();
            System.out.println("Message count: " + messageCount);

            // 关闭收件箱和存储
            inbox.close(false);
            store.close();
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}