从特定的字符串位置读取邮件，并在JAVA邮件API中获取数据

import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;

public class ReadEmail {
    public static void main(String[] args) {
        // 邮件服务器配置
        Properties properties = new Properties();
        properties.setProperty("mail.store.protocol", "imap");
        properties.setProperty("mail.imap.host", "imap.example.com");
        properties.setProperty("mail.imap.port", "993");
        properties.setProperty("mail.imap.ssl.enable", "true");

        // 邮件账户信息
        String username = "your_email@example.com";
        String password = "your_password";

        try {
            // 创建会话对象
            Session session = Session.getInstance(properties);

            // 创建IMAP存储对象并连接到邮件服务器
            Store store = session.getStore("imap");
            store.connect(username, password);

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

            // 获取特定位置的邮件
            int messageIndex = 1; // 邮件索引从1开始
            Message message = inbox.getMessage(messageIndex);

            // 获取邮件数据
            String from = InternetAddress.toString(message.getFrom());
            String to = InternetAddress.toString(message.getRecipients(Message.RecipientType.TO));
            String subject = message.getSubject();
            String sentDate = message.getSentDate().toString();

            // 打印邮件数据
            System.out.println("From: " + from);
            System.out.println("To: " + to);
            System.out.println("Subject: " + subject);
            System.out.println("Sent Date: " + sentDate);

            // 关闭邮件文件夹和存储对象
            inbox.close(false);
            store.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}