JavaEE-JavaMail 05 接收, 解析, 回复, 搜索邮件示例

POP3协议和IMAP协议的区别

• POP3协议允许电子邮件客户端下载服务器上的邮件, 但是在客户端的操作[如移动邮件, 标记已读等), 不会反馈到服务器上

• IMAP协议提供WebMail与电子邮件客户端之间的双向通信, 客户端的操作都会同步反应到服务器上, 对邮件进行的操作, 服务器上的邮件也会做相应的动作, 比如在客户端收取了邮箱中的3封邮件, 并将其中一封标记为已读, 将另外两封标记为删除, 这些操作会即时反馈到服务器上

• 两种协议相比, IMAP协议更为便捷和可靠, POP3容易丢失邮件或多次下载相同的邮件, 但IMAP协议通过邮件客户端, 与WebMail之间的双向同步功能很好地避免了这些问题
  

使用POP3协议查看邮件

/********************************************************************************
 * Project Name      [JavaEE_Components]
 * File Name         [CheckingMailsByPop3.java]
 * Creation Date     [2015-01-01]
 * 
 * Copyright© [email protected] All Rights Reserved
 * 
 * Work hard, play harder, think big and keep fit
 ********************************************************************************/
package javamail.mail;

import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;

import org.junit.Before;
import org.junit.Test;

import javamail.utils.MailConstants;
import javamail.utils.PasswordUtils;

/**
 * 使用POP3协议查看邮件
 * 
 * @author 不落的太阳(Sean Yang aka ShortPeace)
 * @version 1.0
 * @since jdk 1.8
 * 
 */
public class CheckingMailsByPop3 {

    private static Properties properties = null;

    private static String emailAddress = "[email protected]";

    @Before
    public void init() {
        properties = new Properties();
        properties.put("mail.store.protocol", MailConstants.PROTOCAL_POP3);
        properties.put("mail.pop3.host", MailConstants.POP3_HOST_OF_SINA);
        properties.put("mail.pop3.port", MailConstants.POP3_PORT_OF_SINA);
        properties.put("mail.pop3.auth", MailConstants.IS_AUTHORIZATION_NEED);
        properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
    }

    /**
     * 使用POP3协议查看邮件并发送反馈
     * 
     * @throws Exception
     */
    public static void checkMailsByPop3() throws Exception {
        // 创建Session对象并连接到指定的邮箱
        Session session = Session.getInstance(properties);
        Store store = session.getStore(MailConstants.PROTOCAL_POP3);
        store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));

        // 获得收件箱
        Folder folder = store.getFolder("INBOX");
        // 以只读权限打开收件箱, 还可以配置为Folder.READ_WRITE
        folder.open(Folder.READ_ONLY);

        // POP3协议无法获知邮件的状态
        // getUnreadMessageCount得到的是收件箱的邮件总数,
        // getNewMessageCount和getDeletedMessageCount均为0
        System.out.println("一共有邮件" + folder.getMessageCount() + "封");
        System.out.println("新邮件有" + folder.getNewMessageCount() + "封");
        System.out.println("未读邮件有" + folder.getUnreadMessageCount() + "封");
        System.out.println("删除邮件有" + folder.getDeletedMessageCount() + "封");

        // 获得所有邮件
        Message[] messages = folder.getMessages();
        System.out.println("邮件数" + messages.length);

        folder.close(true);
        store.close();
    }

    @Test
    public void testCheckMailsByPop3() throws Exception {
        checkMailsByPop3();
    }
}

使用IMAP协议查看邮件

/********************************************************************************
 * Project Name       [JavaEE_Components]
 * File Name         [CheckingMailsByImap.java]
 * Creation Date     [2015-01-01]
 * 
 * Copyright© [email protected] All Rights Reserved
 * 
 * Work hard, play harder, think big and keep fit
 ********************************************************************************/
package javamail.mail;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Properties;

import javax.mail.Flags.Flag;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.MimeUtility;

import org.junit.Before;
import org.junit.Test;

import com.sun.mail.imap.IMAPMessage;

import javamail.utils.MailConstants;
import javamail.utils.MailUtils;
import javamail.utils.PasswordUtils;

/**
 * 使用IMAP协议查看邮件
 * 
 * @author 不落的太阳(Sean Yang aka ShortPeace)
 * @version 1.0
 * @since jdk 1.8
 * 
 */
public class CheckingMailsByImap {

    private static Properties properties = null;

    private static String emailAddress = "[email protected]";

    @Before
    public void init() {
        properties = new Properties();
        properties.put("mail.store.protocol", MailConstants.PROTOCAL_IMAP);
        properties.put("mail.imap.host", MailConstants.IMAP_HOST_OF_SINA);
        properties.put("mail.imap.port", MailConstants.IMAP_PORT_OF_SINA);
        properties.put("mail.imap.auth", MailConstants.IS_AUTHORIZATION_NEED);
        properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
    }

    /**
     * 使用IMAP协议查看邮件并发送反馈
     * 
     * @throws Exception
     */
    public static void checkMailsByImap() throws Exception {
        // 创建Session对象并连接到指定的邮箱
        Session session = Session.getInstance(properties);
        Store store = session.getStore("imap");
        store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));

        // 获得收件箱
        Folder folder = store.getFolder("INBOX");
        // 打开收件箱
        folder.open(Folder.READ_WRITE);

        // 获取邮件列表
        System.out.println("一共有邮件" + folder.getMessageCount() + "封");
        System.out.println("新邮件有" + folder.getNewMessageCount() + "封");
        System.out.println("未读邮件有" + folder.getUnreadMessageCount() + "封");
        System.out.println("删除邮件有" + folder.getDeletedMessageCount() + "封");

        // 获得所有邮件并解析
        Message[] messages = folder.getMessages();
        for (Message message : messages) {
            IMAPMessage imapMessage = (IMAPMessage) message;
            String subject = MimeUtility.decodeText(imapMessage.getSubject());
            boolean isSeen = MailUtils.isSeen(imapMessage);
            if (!isSeen) {
                System.out.println("[" + subject + "]未读, 现在开始读吗?");

                BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
                String answer = reader.readLine();
                if ("yes".equalsIgnoreCase(answer)) {
                    // 将邮件标为已读, 并向服务器发送反馈
                    message.setFlag(Flag.SEEN, true);
                }
            }
        }
        folder.close(true);
        store.close();
    }

    @Test
    public void testCheckMailsByImap() throws Exception {
        checkMailsByImap();
    }
}

解析邮件的内容

修改之前定义的MailUtils, 增加相应的解析方法

由于超出博文限制, 下一篇会单独列出

回复邮件, 使用POP3协议查看邮件, 使用SMTP协议发送回复邮件

/********************************************************************************
 * Project Name      [JavaEE_Components]
 * File Name         [ReplyingMails.java]
 * Creation Date     [2015-01-01]
 * 
 * Copyright© [email protected] All Rights Reserved
 * 
 * Work hard, play harder, think big and keep fit
 ********************************************************************************/
package javamail.mail;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Date;
import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;

import org.junit.Before;
import org.junit.Test;

import javamail.utils.MailConstants;
import javamail.utils.PasswordUtils;

/**
 * 使用POP3和SMTP协议来回复邮件<br/>
 * 
 * POP3协议负责读取原邮件<br/>
 * SMTP协议负责回复原邮件<br/>
 * 
 * @author 不落的太阳(Sean Yang aka ShortPeace)
 * @version 1.0
 * @since jdk 1.8
 * 
 */
public class ReplyingMails {

    private static Properties properties;

    private static String emailAddress = "[email protected]";

    @Before
    public void init() {
        properties = new Properties();
        properties.put("mail.store.protocol", MailConstants.PROTOCAL_POP3);
        properties.put("mail.pop3.host", MailConstants.POP3_HOST_OF_SINA);
        properties.put("mail.pop3.port", MailConstants.POP3_PORT_OF_SINA);
        properties.put("mail.pop3.auth", MailConstants.IS_AUTHORIZATION_NEED);

        properties.put("mail.smtp.host", MailConstants.SMTP_HOST_OF_SINA);
        properties.put("mail.smtp.port", MailConstants.SMTP_PORT_OF_SINA);
        properties.put("mail.smtp.auth", MailConstants.IS_AUTHORIZATION_NEED);
        properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
    }

    /**
     * 回复邮件
     * 
     * @throws Exception
     */
    public static void replayMails() throws Exception {
        Session session = Session.getInstance(properties);
        Store store = session.getStore(MailConstants.PROTOCAL_POP3);
        store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));

        Folder folder = store.getFolder("INBOX");
        folder.open(Folder.READ_WRITE);

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        Message[] messages = folder.getMessages();
        if (messages != null && messages.length > 0) {
            for (Message message : messages) {
                String from = InternetAddress.toString(message.getFrom());
                if (from != null) {
                    System.out.println("发件人: " + MimeUtility.decodeText(from));
                }

                String replayTo = InternetAddress.toString(message.getReplyTo());
                if (replayTo != null) {
                    System.out.println("回复: " + MimeUtility.decodeText(replayTo));
                }

                String to = InternetAddress.toString(message.getRecipients(RecipientType.TO));
                System.out.println("收件人: " + MimeUtility.decodeText(to));

                String subject = message.getSubject();
                if (subject != null) {
                    System.out.println("主题: " + MimeUtility.decodeText(subject));
                }

                Date sendDate = message.getSentDate();
                if (sendDate != null) {
                    System.out.println("发送时间: " + sendDate);
                }

                System.out.println("确定要回复么?");
                String answer = reader.readLine();
                if ("yes".equalsIgnoreCase(answer)) {
                    MimeMessage replayMessage = new MimeMessage(session);
                    replayMessage = (MimeMessage) message.reply(false);
                    replayMessage.setFrom(new InternetAddress(to));
                    replayMessage.setText("这是一封邮件回复...");
                    replayMessage.setReplyTo(message.getReplyTo());
                    Transport transport = session.getTransport(MailConstants.PROTOCOL_SMTP);
                    transport.connect(MailConstants.SMTP_HOST_OF_SINA, emailAddress,
                            PasswordUtils.readPassword(emailAddress));
                    transport.sendMessage(replayMessage, replayMessage.getAllRecipients());
                    transport.close();
                } else {
                    break;
                }
            }
        }

        folder.close(true);
        store.close();
    }

    @Test
    public void testReplayMails() throws Exception {
        replayMails();
    }
}

转发邮件, 使用POP3协议查看邮件, 使用SMTP协议转发邮件

/********************************************************************************
 * Project Name      [JavaEE_Components]
 * File Name         [ForwardingMails.java]
 * Creation Date     [2015-01-01]
 * 
 * Copyright© [email protected] All Rights Reserved
 * 
 * Work hard, play harder, think big and keep fit
 ********************************************************************************/
package javamail.mail;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Date;
import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

import org.junit.Before;
import org.junit.Test;

import javamail.utils.MailConstants;
import javamail.utils.PasswordUtils;

/**
 * 使用POP3和SMTP协议来转发邮件<br/>
 * 
 * POP3协议负责读取原邮件<br/>
 * SMTP协议负责转发原邮件<br/>
 * 
 * @author 不落的太阳(Sean Yang aka ShortPeace)
 * @version 1.0
 * @since jdk 1.8
 * 
 */
public class ForwardingMails {

    private static Properties properties;

    private static String emailAddress = "[email protected]";

    @Before
    public void init() {
        properties = new Properties();
        properties.put("mail.store.protocol", MailConstants.PROTOCAL_POP3);
        properties.put("mail.pop3.host", MailConstants.POP3_HOST_OF_SINA);
        properties.put("mail.pop3.port", MailConstants.POP3_PORT_OF_SINA);
        properties.put("mail.pop3.auth", MailConstants.IS_AUTHORIZATION_NEED);

        properties.put("mail.smtp.host", MailConstants.SMTP_HOST_OF_SINA);
        properties.put("mail.smtp.port", MailConstants.SMTP_PORT_OF_SINA);
        properties.put("mail.smtp.auth", MailConstants.IS_AUTHORIZATION_NEED);
        properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
    }

    /**
     * 转发邮件
     * 
     * @throws Exception
     */
    public static void fowrardMails() throws Exception {
        Session session = Session.getInstance(properties);
        Store store = session.getStore(MailConstants.PROTOCAL_POP3);
        store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));

        Folder folder = store.getFolder("INBOX");
        folder.open(Folder.READ_WRITE);

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        Message[] messages = folder.getMessages();
        if (messages != null && messages.length > 0) {
            for (Message message : messages) {
                String from = InternetAddress.toString(message.getFrom());
                if (from != null) {
                    System.out.println("发件人: " + MimeUtility.decodeText(from));
                }

                String replayTo = InternetAddress.toString(message.getReplyTo());
                if (replayTo != null) {
                    System.out.println("回复: " + MimeUtility.decodeText(replayTo));
                }

                String to = InternetAddress.toString(message.getRecipients(RecipientType.TO));
                System.out.println("收件人: " + MimeUtility.decodeText(to));

                String subject = message.getSubject();
                if (subject != null) {
                    System.out.println("主题: " + MimeUtility.decodeText(subject));
                }

                Date sendDate = message.getSentDate();
                if (sendDate != null) {
                    System.out.println("发送时间: " + sendDate);
                }

                System.out.println("确定要转发么?");
                String answer = reader.readLine();
                if ("yes".equalsIgnoreCase(answer)) {
                    MimeMessage forwardMessage = new MimeMessage(session);
                    forwardMessage.setRecipients(RecipientType.TO, InternetAddress.parse(from));
                    forwardMessage.setFrom(new InternetAddress(to));
                    forwardMessage.setSubject("转发: " + subject);

                    MimeBodyPart messageBodyPart = new MimeBodyPart();
                    Multipart multipart = new MimeMultipart();
                    messageBodyPart.setContent(message, "message/rfc822");
                    multipart.addBodyPart(messageBodyPart);
                    forwardMessage.setContent(multipart);
                    forwardMessage.saveChanges();

                    Transport transport = session.getTransport(MailConstants.PROTOCOL_SMTP);
                    transport.connect(MailConstants.SMTP_HOST_OF_SINA, emailAddress,
                            PasswordUtils.readPassword(emailAddress));
                    transport.sendMessage(forwardMessage, forwardMessage.getAllRecipients());
                    transport.close();
                } else {
                    break;
                }
            }
        }

        folder.close(true);
        store.close();
    }

    @Test
    public void testForwardMails() throws Exception {
        fowrardMails();
    }
}

删除邮件

/********************************************************************************
 * Project Name      [JavaEE_Components]
 * File Name         [DeletingMails.java]
 * Creation Date     [2015-01-01]
 * 
 * Copyright© [email protected] All Rights Reserved
 * 
 * Work hard, play harder, think big and keep fit
 ********************************************************************************/
package javamail.mail;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Date;
import java.util.Properties;

import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeUtility;

import org.junit.Before;
import org.junit.Test;

import javamail.utils.MailConstants;
import javamail.utils.PasswordUtils;

/**
 * 删除邮件, 更新邮件状态<br/>
 * 
 * 有关邮件状态的一些标记<br/>
 * Flags.Flag.ANSWERED<br/>
 * Flags.Flag.DELETED<br/>
 * Flags.Flag.DRAFT<br/>
 * Flags.Flag.FLAGGED<br/>
 * Flags.Flag.RECENT<br/>
 * Flags.Flag.SEEN<br/>
 * Flags.Flag.USER<br/>
 * 
 * @author 不落的太阳(Sean Yang aka ShortPeace)
 * @version 1.0
 * @since jdk 1.8
 * 
 */
public class DeletingMails {

    private static Properties properties;

    private static String emailAddress = "[email protected]";

    @Before
    public void init() {
        properties = new Properties();
        properties.put("mail.store.protocol", MailConstants.PROTOCAL_POP3);
        properties.put("mail.pop3.host", MailConstants.POP3_HOST_OF_SINA);
        properties.put("mail.pop3.port", MailConstants.POP3_PORT_OF_SINA);
        properties.put("mail.pop3.auth", MailConstants.IS_AUTHORIZATION_NEED);

        properties.put("mail.smtp.host", MailConstants.SMTP_HOST_OF_SINA);
        properties.put("mail.smtp.port", MailConstants.SMTP_PORT_OF_SINA);
        properties.put("mail.smtp.auth", MailConstants.IS_AUTHORIZATION_NEED);
        properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
    }

    /**
     * 删除邮件
     * 
     * @throws Exception
     */
    public static void deleteMails() throws Exception {
        Session session = Session.getInstance(properties);
        Store store = session.getStore(MailConstants.PROTOCAL_POP3);
        store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));

        Folder folder = store.getFolder("INBOX");
        folder.open(Folder.READ_WRITE);

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        Message[] messages = folder.getMessages();
        if (messages != null && messages.length > 0) {
            for (Message message : messages) {
                String from = InternetAddress.toString(message.getFrom());
                if (from != null) {
                    System.out.println("发件人: " + MimeUtility.decodeText(from));
                }

                String replayTo = InternetAddress.toString(message.getReplyTo());
                if (replayTo != null) {
                    System.out.println("回复: " + MimeUtility.decodeText(replayTo));
                }

                String to = InternetAddress.toString(message.getRecipients(RecipientType.TO));
                System.out.println("收件人: " + MimeUtility.decodeText(to));

                String subject = message.getSubject();
                if (subject != null) {
                    System.out.println("主题: " + MimeUtility.decodeText(subject));
                }

                Date sendDate = message.getSentDate();
                if (sendDate != null) {
                    System.out.println("发送时间: " + sendDate);
                }

                System.out.println("确定要删除该邮件吗?");
                String answer = reader.readLine();
                if ("yes".equalsIgnoreCase(answer)) {
                    message.setFlag(Flags.Flag.DELETED, true);
                    System.out.println("删除消息成功");
                } else {
                    break;
                }
            }
        }

        folder.close(true);
        store.close();
    }

    @Test
    public void testDeleteMails() throws Exception {
        deleteMails();
    }
}

搜索邮件

/********************************************************************************
 * Project Name      [JavaEE_Components]
 * File Name         [SearchingMails.java]
 * Creation Date     [2015-01-01]
 * 
 * Copyright© [email protected] All Rights Reserved
 * 
 * Work hard, play harder, think big and keep fit
 ********************************************************************************/
package javamail.mail;

import java.util.Calendar;
import java.util.Date;
import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.URLName;
import javax.mail.search.AndTerm;
import javax.mail.search.BodyTerm;
import javax.mail.search.ComparisonTerm;
import javax.mail.search.FromStringTerm;
import javax.mail.search.IntegerComparisonTerm;
import javax.mail.search.NotTerm;
import javax.mail.search.OrTerm;
import javax.mail.search.SearchTerm;
import javax.mail.search.SentDateTerm;
import javax.mail.search.SizeTerm;
import javax.mail.search.SubjectTerm;

import org.junit.Before;
import org.junit.Test;

import javamail.utils.MailConstants;
import javamail.utils.PasswordUtils;

/**
 * 搜索邮件
 * 
 * @author 不落的太阳(Sean Yang aka ShortPeace)
 * @version 1.0
 * @since jdk 1.8
 * 
 */
public class SearchingMails {

    private static Properties properties = null;

    private static String emailAddress = "[email protected]";
    private static URLName url;

    @Before
    public void init() {
        properties = new Properties();
        properties.put("mail.pop3.auth", MailConstants.IS_AUTHORIZATION_NEED);
        properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
        url = new URLName(MailConstants.PROTOCAL_POP3, MailConstants.POP3_HOST_OF_SINA,
                Integer.parseInt(MailConstants.POP3_PORT_OF_SINA), null, emailAddress,
                PasswordUtils.readPassword(emailAddress));
    }

    /**
     * 搜索邮件
     * 
     * @throws Exception
     */
    public static void searchMails() throws Exception {
        // 创建Session对象并连接到指定的邮箱
        Session session = Session.getInstance(properties);
        Store store = session.getStore(url);
        store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));

        // 获得收件箱
        Folder folder = store.getFolder("INBOX");
        // 以只读权限打开收件箱, 还可以配置为Folder.READ_WRITE
        folder.open(Folder.READ_ONLY);

        // 得到收件箱里所以的邮件
        Message[] messages = searchMails(folder);
        System.out.println("一共有邮件" + messages.length + "封");
    }

    /**
     * 根据条件搜索邮件
     * 
     * @param folder
     * @return
     * @throws MessagingException
     */
    @SuppressWarnings("unused")
    private static Message[] searchMails(Folder folder) throws MessagingException {
        // 搜索主题
        String subject = "java";
        SearchTerm subjectTerm = new SubjectTerm(subject);

        // 搜索发件人
        String emailFrom = "[email protected]";
        SearchTerm fromTerm = new FromStringTerm(emailFrom);

        // 搜索内容
        String content = "html";
        SearchTerm bodyTerm = new BodyTerm(content);

        SearchTerm andTerm = new AndTerm(subjectTerm, fromTerm);
        SearchTerm notTerm = new NotTerm(bodyTerm);
        SearchTerm orTerm = new OrTerm(andTerm, notTerm);

        // 搜索周一到今天所有的邮件
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        Date monday = calendar.getTime();
        SearchTerm geTerm = new SentDateTerm(ComparisonTerm.GE, monday);
        SearchTerm leTerm = new SentDateTerm(ComparisonTerm.LE, new Date());
        SearchTerm dateRangeTerm = new AndTerm(geTerm, leTerm);

        // 邮件大小
        int size = 1024 * 100; // 100kb
        SearchTerm mailSizeTerm = new SizeTerm(IntegerComparisonTerm.GE, size);

        return folder.search(dateRangeTerm);
    }

    @Test
    public void testSearchMails() throws Exception {
        searchMails();
    }
}