Java收取邮件示例

import com.sun.mail.imap.IMAPFolder;
import com.sun.mail.imap.IMAPStore;

import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import java.util.Properties;

/**
 * @Author: machi
 * @Date: 2020-05-29
 * @Time: 17:47
 * @ClassName: test
 * @Description:
 */
public class test {

    public static void main(String[] args) throws Exception {
        String user = "[email protected]";// 邮箱的用户名
        String password = "ERYLSOUDFQMQLWJA"; // 邮箱的密码 或者相应授权码*/
        //String password = "XYGYRLDRUGXRSLAZ"; // 邮箱的密码*/
        //String password = "mXrBqjoFWuzVPUe7"; // 邮箱的密码*/


     
        Properties prop = System.getProperties();
        prop.put("mail.store.protocol", "imap");
        prop.put("mail.imap.host", "imap.163.com");
        // prop.put("mail.imap.host", "imap.exmail.qq.com");

        //开启ssl
        prop.setProperty("mail.smtp.auth", "true");//开启认证
        prop.setProperty("mail.debug", "true");//启用调试
        prop.setProperty("mail.smtp.timeout", "200000");//设置链接超时
        prop.setProperty("mail.smtp.port", Integer.toString(25));//设置端口
        prop.setProperty("mail.smtp.socketFactory.port", Integer.toString(465));//设置ssl端口
        prop.setProperty("mail.smtp.socketFactory.fallback", "false");
        prop.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

        Session session = Session.getInstance(prop);

        int total = 0;
        IMAPStore store = (IMAPStore) session.getStore("imap"); // 使用imap会话机制，连接服务器
        store.connect(user, password);
        IMAPFolder folder = (IMAPFolder) store.getFolder("INBOX"); // 收件箱

        folder.open(Folder.READ_WRITE);
        // 获取总邮件数
        total = folder.getMessageCount();
        System.out.println("-----------------共有邮件：" + total
                + " 封--------------");
        // 得到收件箱文件夹信息，获取邮件列表
        System.out.println("未读邮件数：" + folder.getUnreadMessageCount());
        Message[] messages = folder.getMessages();
        int messageNumber = 0;
        for (Message message : messages) {
            System.out.println("发送时间：" + message.getSentDate());
            System.out.println("主题：" + message.getSubject());
            System.out.println("内容：" + message.getContent());
            Flags flags = message.getFlags();
            if (flags.contains(Flags.Flag.SEEN))
                System.out.println("这是一封已读邮件");
            else {
                System.out.println("未读邮件");
            }
            System.out
                    .println("========================================================");
            System.out
                    .println("========================================================");
            //每封邮件都有一个MessageNumber，可以通过邮件的MessageNumber在收件箱里面取得该邮件
            messageNumber = message.getMessageNumber();
        }
        Message message = folder.getMessage(messageNumber);
        System.out.println(message.getContent() + message.getContentType());
        // 释放资源
        if (folder != null)
            folder.close(true);
        if (store != null)
            store.close();
    }


}