将邮件从一个文件夹复制到同一电子邮件服务器中的另一个文件夹- java mail

import javax.mail.*;

public class MailCopyExample {
    public static void main(String[] args) {
        String sourceFolderName = "INBOX/sourceFolder";
        String targetFolderName = "INBOX/targetFolder";
        String username = "your_username";
        String password = "your_password";
        String host = "your_mail_server_host";

        try {
            // 创建与邮件服务器的连接
            Session session = Session.getDefaultInstance(System.getProperties());
            Store store = session.getStore("imap");
            store.connect(host, username, password);

            // 打开源文件夹和目标文件夹
            Folder sourceFolder = store.getFolder(sourceFolderName);
            sourceFolder.open(Folder.READ_WRITE);
            Folder targetFolder = store.getFolder(targetFolderName);
            targetFolder.open(Folder.READ_WRITE);

            // 复制邮件
            Message[] messages = sourceFolder.getMessages();
            targetFolder.appendMessages(messages);

            // 关闭文件夹和连接
            sourceFolder.close(false);
            targetFolder.close(false);
            store.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}