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邮箱服务--163邮箱pop3获取收件箱

邮箱服务--163邮箱pop3获取收件箱

作者: Y_LY | 来源:发表于2018-11-26 09:41 被阅读27次

package com.xxx.xxx;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

public class MailTest {

public static void main(String[] args) throws Exception {
    resceive();
}

/**
 * 接收邮件
 */
public static void resceive() throws Exception {
    /**
       * 因为现在使用的是163邮箱 而163的 pop地址是 pop3.163.com  端口是 110  
          * 比如使用好未来企业邮箱 就需要换成 好未来邮箱的 pop服务器地址 pop.263.net  和   端口 110
        */
    String socket = "110";   // 端口号
    String servicePath = "pop3.163.com";   // 服务器地址


    // 准备连接服务器的会话信息
    Properties props = new Properties();
    props.setProperty("mail.store.protocol", "pop3");       // 使用pop3协议
    props.setProperty("mail.pop3.port", socket);           // 端口
    props.setProperty("mail.pop3.host", servicePath);       // pop3服务器

    // 创建Session实例对象
    Session session = Session.getInstance(props);
    Store store = session.getStore("pop3");
    store.connect("xxx@163.com", "password"); //163邮箱程序登录属于第三方登录所以这里的密码是163给的授权密码而并非普通的登录密码

    // 获得收件箱
    Folder folder = store.getFolder("INBOX");
    /* Folder.READ_ONLY:只读权限
     * Folder.READ_WRITE:可读可写(可以修改邮件的状态)
     */
    folder.open(Folder.READ_WRITE); //打开收件箱

    // 由于POP3协议无法获知邮件的状态,所以getUnreadMessageCount得到的是收件箱的邮件总数
    System.out.println("未读邮件数: " + folder.getUnreadMessageCount());

    // 由于POP3协议无法获知邮件的状态,所以下面得到的结果始终都是为0
    System.out.println("删除邮件数: " + folder.getDeletedMessageCount());
    System.out.println("新邮件: " + folder.getNewMessageCount());

    // 获得收件箱中的邮件总数
    System.out.println("邮件总数: " + folder.getMessageCount());

    // 得到收件箱中的所有邮件,并解析
    Message[] messages = folder.getMessages();
    parseMessage(messages);

    //得到收件箱中的所有邮件并且删除邮件
    //deleteMessage(messages);

    //释放资源
    folder.close(true);
    store.close();
}

/**
 * 解析邮件
 *
 * @param messages 要解析的邮件列表
 */
public static void parseMessage(Message... messages) throws MessagingException, IOException {
    if (messages == null || messages.length < 1)
        throw new MessagingException("未找到要解析的邮件!");

    // 解析所有邮件
    for (int i = 0, count = messages.length; i < count; i++) {
        MimeMessage msg = (MimeMessage) messages[i];
        System.out.println("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
        System.out.println("主题: " + getSubject(msg));
        System.out.println("发件人: " + getFrom(msg));
        System.out.println("收件人:" + getReceiveAddress(msg, null));
        System.out.println("发送时间:" + getSentDate(msg, null));
        System.out.println("是否已读:" + isSeen(msg));
        System.out.println("邮件优先级:" + getPriority(msg));
        System.out.println("是否需要回执:" + isReplySign(msg));
        System.out.println("邮件大小:" + msg.getSize() * 1024 + "kb");
        boolean isContainerAttachment = isContainAttachment(msg);
        System.out.println("是否包含附件:" + isContainerAttachment);
        if (isContainerAttachment) {
            saveAttachment(msg, "f:\\mailTest\\" + msg.getSubject() + "_" + i + "_"); //保存附件
        }
        StringBuffer content = new StringBuffer(30);
        getMailTextContent(msg, content);
        System.out.println("邮件正文:" + (content.length() > 100 ? content.substring(0, 100) + "..." : content));
        System.out.println("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
        System.out.println();

    }
}


/**
 * 解析邮件
 *
 * @param messages 要解析的邮件列表
 */
public static void deleteMessage(Message... messages) throws MessagingException, IOException {
    if (messages == null || messages.length < 1)
        throw new MessagingException("未找到要解析的邮件!");

    // 解析所有邮件
    for (int i = 0, count = messages.length; i < count; i++) {

        /**
         *   邮件删除
         */
        Message message = messages[i];
        String subject = message.getSubject();
        // set the DELETE flag to true
        message.setFlag(Flags.Flag.DELETED, true);
        System.out.println("Marked DELETE for message: " + subject);


    }
}

/**
 * 获得邮件主题
 *
 * @param msg 邮件内容
 * @return 解码后的邮件主题
 */
public static String getSubject(MimeMessage msg) throws UnsupportedEncodingException, MessagingException {
    return MimeUtility.decodeText(msg.getSubject());
}

/**
 * 获得邮件发件人
 *
 * @param msg 邮件内容
 * @return 姓名 <Email地址>
 * @throws MessagingException
 * @throws UnsupportedEncodingException
 */
public static String getFrom(MimeMessage msg) throws MessagingException, UnsupportedEncodingException {
    String from = "";
    Address[] froms = msg.getFrom();
    if (froms.length < 1)
        throw new MessagingException("没有发件人!");

    InternetAddress address = (InternetAddress) froms[0];
    String person = address.getPersonal();
    if (person != null) {
        person = MimeUtility.decodeText(person) + " ";
    } else {
        person = "";
    }
    from = person + "<" + address.getAddress() + ">";

    return from;
}

/**
 * 根据收件人类型,获取邮件收件人、抄送和密送地址。如果收件人类型为空,则获得所有的收件人
 * <p>Message.RecipientType.TO  收件人</p>
 * <p>Message.RecipientType.CC  抄送</p>
 * <p>Message.RecipientType.BCC 密送</p>
 *
 * @param msg  邮件内容
 * @param type 收件人类型
 * @return 收件人1 <邮件地址1>, 收件人2 <邮件地址2>, ...
 * @throws MessagingException
 */
public static String getReceiveAddress(MimeMessage msg, Message.RecipientType type) throws MessagingException {
    StringBuffer receiveAddress = new StringBuffer();
    Address[] addresss = null;
    if (type == null) {
        addresss = msg.getAllRecipients();
    } else {
        addresss = msg.getRecipients(type);
    }

    if (addresss == null || addresss.length < 1)
        throw new MessagingException("没有收件人!");
    for (Address address : addresss) {
        InternetAddress internetAddress = (InternetAddress) address;
        receiveAddress.append(internetAddress.toUnicodeString()).append(",");
    }

    receiveAddress.deleteCharAt(receiveAddress.length() - 1); //删除最后一个逗号

    return receiveAddress.toString();
}

/**
 * 获得邮件发送时间
 *
 * @param msg 邮件内容
 * @return yyyy年mm月dd日 星期X HH:mm
 * @throws MessagingException
 */
public static String getSentDate(MimeMessage msg, String pattern) throws MessagingException {
    Date receivedDate = msg.getSentDate();
    if (receivedDate == null)
        return "";

    if (pattern == null || "".equals(pattern))
        pattern = "yyyy年MM月dd日 E HH:mm ";

    return new SimpleDateFormat(pattern).format(receivedDate);
}

/**
 * 判断邮件中是否包含附件
 *
 * @param msg 邮件内容
 * @return 邮件中存在附件返回true,不存在返回false
 * @throws MessagingException
 * @throws IOException
 */
public static boolean isContainAttachment(Part part) throws MessagingException, IOException {
    boolean flag = false;
    if (part.isMimeType("multipart/*")) {
        MimeMultipart multipart = (MimeMultipart) part.getContent();
        int partCount = multipart.getCount();
        for (int i = 0; i < partCount; i++) {
            BodyPart bodyPart = multipart.getBodyPart(i);
            String disp = bodyPart.getDisposition();
            if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
                flag = true;
            } else if (bodyPart.isMimeType("multipart/*")) {
                flag = isContainAttachment(bodyPart);
            } else {
                String contentType = bodyPart.getContentType();
                if (contentType.indexOf("application") != -1) {
                    flag = true;
                }

                if (contentType.indexOf("name") != -1) {
                    flag = true;
                }
            }

            if (flag) break;
        }
    } else if (part.isMimeType("message/rfc822")) {
        flag = isContainAttachment((Part) part.getContent());
    }
    return flag;
}

/**
 * 判断邮件是否已读
 *
 * @param msg 邮件内容
 * @return 如果邮件已读返回true, 否则返回false
 * @throws MessagingException
 */
public static boolean isSeen(MimeMessage msg) throws MessagingException {
    return msg.getFlags().contains(Flags.Flag.SEEN);
}

/**
 * 判断邮件是否需要阅读回执
 *
 * @param msg 邮件内容
 * @return 需要回执返回true, 否则返回false
 * @throws MessagingException
 */
public static boolean isReplySign(MimeMessage msg) throws MessagingException {
    boolean replySign = false;
    String[] headers = msg.getHeader("Disposition-Notification-To");
    if (headers != null)
        replySign = true;
    return replySign;
}

/**
 * 获得邮件的优先级
 *
 * @param msg 邮件内容
 * @return 1(High):紧急  3:普通(Normal)  5:低(Low)
 * @throws MessagingException
 */
public static String getPriority(MimeMessage msg) throws MessagingException {
    String priority = "普通";
    String[] headers = msg.getHeader("X-Priority");
    if (headers != null) {
        String headerPriority = headers[0];
        if (headerPriority.indexOf("1") != -1 || headerPriority.indexOf("High") != -1)
            priority = "紧急";
        else if (headerPriority.indexOf("5") != -1 || headerPriority.indexOf("Low") != -1)
            priority = "低";
        else
            priority = "普通";
    }
    return priority;
}

/**
 * 获得邮件文本内容
 *
 * @param part    邮件体
 * @param content 存储邮件文本内容的字符串
 * @throws MessagingException
 * @throws IOException
 */
public static void getMailTextContent(Part part, StringBuffer content) throws MessagingException, IOException {
    //如果是文本类型的附件,通过getContent方法可以取到文本内容,但这不是我们需要的结果,所以在这里要做判断
    boolean isContainTextAttach = part.getContentType().indexOf("name") > 0;
    if (part.isMimeType("text/*") && !isContainTextAttach) {
        content.append(part.getContent().toString());
    } else if (part.isMimeType("message/rfc822")) {
        getMailTextContent((Part) part.getContent(), content);
    } else if (part.isMimeType("multipart/*")) {
        Multipart multipart = (Multipart) part.getContent();
        int partCount = multipart.getCount();
        for (int i = 0; i < partCount; i++) {
            BodyPart bodyPart = multipart.getBodyPart(i);
            getMailTextContent(bodyPart, content);
        }
    }
}

/**
 * 保存附件
 *
 * @param part    邮件中多个组合体中的其中一个组合体
 * @param destDir 附件保存目录
 * @throws UnsupportedEncodingException
 * @throws MessagingException
 * @throws FileNotFoundException
 * @throws IOException
 */
public static void saveAttachment(Part part, String destDir) throws UnsupportedEncodingException, MessagingException,
        FileNotFoundException, IOException {
    if (part.isMimeType("multipart/*")) {
        Multipart multipart = (Multipart) part.getContent();    //复杂体邮件
        //复杂体邮件包含多个邮件体
        int partCount = multipart.getCount();
        for (int i = 0; i < partCount; i++) {
            //获得复杂体邮件中其中一个邮件体
            BodyPart bodyPart = multipart.getBodyPart(i);
            //某一个邮件体也有可能是由多个邮件体组成的复杂体
            String disp = bodyPart.getDisposition();
            if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
                InputStream is = bodyPart.getInputStream();
                saveFile(is, destDir, decodeText(bodyPart.getFileName()));
            } else if (bodyPart.isMimeType("multipart/*")) {
                saveAttachment(bodyPart, destDir);
            } else {
                String contentType = bodyPart.getContentType();
                if (contentType.indexOf("name") != -1 || contentType.indexOf("application") != -1) {
                    saveFile(bodyPart.getInputStream(), destDir, decodeText(bodyPart.getFileName()));
                }
            }
        }
    } else if (part.isMimeType("message/rfc822")) {
        saveAttachment((Part) part.getContent(), destDir);
    }
}

/**
 * 读取输入流中的数据保存至指定目录
 *
 * @param is       输入流
 * @param fileName 文件名
 * @param destDir  文件存储目录
 * @throws FileNotFoundException
 * @throws IOException
 */
private static void saveFile(InputStream is, String destDir, String fileName)
        throws FileNotFoundException, IOException {
    BufferedInputStream bis = new BufferedInputStream(is);
    BufferedOutputStream bos = new BufferedOutputStream(
            new FileOutputStream(new File(destDir + fileName)));
    int len = -1;
    while ((len = bis.read()) != -1) {
        bos.write(len);
        bos.flush();
    }
    bos.close();
    bis.close();
}

/**
 * 文本解码
 *
 * @param encodeText 解码MimeUtility.encodeText(String text)方法编码后的文本
 * @return 解码后的文本
 * @throws UnsupportedEncodingException
 */
public static String decodeText(String encodeText) throws UnsupportedEncodingException {
    if (encodeText == null || "".equals(encodeText)) {
        return "";
    } else {
        return MimeUtility.decodeText(encodeText);
    }
}

}

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