Alibaba Mail：IMAP下載郵件之Java調用樣本

import java.io.FileOutputStream;
import java.io.File;
import java.util.Properties;
import javax.mail.*;

public class ImapEmailDownloader {
    public static void main(String[] args) {
        // 郵件伺服器配置
        String host = "imap.sg.aliyun.com"; 
        String username = "";
        String password = "";
        // 串連屬性配置
        Properties properties = new Properties();
        properties.put("mail.store.protocol", "imap");
        properties.put("mail.imap.host", host);
        properties.put("mail.imap.port", "993");
        properties.put("mail.imap.ssl.enable", "true");
        //properties.put("mail.imap.ssl.protocols", "TLSv1.2");//如遇到報錯SSLHandshakeException可去掉注釋後重試

        //本地檔案夾路徑，請換成實際的檔案夾路徑。
        String folderPath = "D:\\檔案夾1\\檔案夾1-1";

        try {
            // 建立會話對象
            Session session = Session.getDefaultInstance(properties);
            // 串連到郵件伺服器
            Store store = session.getStore();
            store.connect(username, password);
            // 開啟收件匣
            Folder inbox = store.getFolder("INBOX");
            inbox.open(Folder.READ_ONLY);
            // 擷取郵件清單
            Message[] messages = inbox.getMessages();
            // 遍曆郵件並下載EML格式的郵件
            for (Message message : messages) {
                String subject = message.getSubject();
                String fileName = subject + ".eml";
                //構建本地檔案路徑
                String filePath = folderPath + File.separator + fileName;
                //下載郵件到本地檔案夾
                FileOutputStream fos = new FileOutputStream(filePath);
                message.writeTo(fos);
                System.out.println("下載郵件：" + fileName);
            }
            // 關閉串連
            inbox.close(false);
            store.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}