java 接收邮件的demo

代码示例请查看我的资源 https://download.csdn.net/download/heqinghua217/11983107

163邮箱的基本设置,可以参看如下图片。客户端授权密码就是接受邮件的密码,不是登录邮箱密码,切记。

还有一点,接收邮件的java包不要用jdk自带的,我用了报错,所以我改成我自己的mail.jar,就好了

java 接收邮件的demo_第1张图片

java 接收邮件的demo_第2张图片

 

package com.person;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
 
/**
 * 使用POP3协议解析邮件帮助类
 *
 * @author bzs on 2018/6/28.
 */
public class ParsingEmailUtil {
 
    public static void main(String[] args) {
    	try {
    		 resceive("[email protected]", "****第三方密码");
		} catch (Exception e) {
			e.printStackTrace();
		}
       
    }
 
    /**
     * 获取邮箱信息
     *
     * @param emailAdress 需要解析的邮箱地址
     * @param password    邮箱的授权密码
     * @throws Exception
     */
    public static void resceive(String emailAdress, String password) throws Exception {
 
        String port = "110";   // 端口号
        String servicePath = "pop.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", port);           // 端口
        props.setProperty("mail.pop3.host", servicePath);       // pop3服务器
        //props.setProperty("mail.pop3.auth", "true");
 
        // 创建Session实例对象
        Session session = Session.getInstance(props);
        Store store = session.getStore("pop3");
        store.connect(emailAdress, 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());
        //log.warn("邮件总数: {}", folder.getMessageCount());
 
        // 得到收件箱中的所有邮件,并解析
        Message[] messages = folder.getMessages();
        //解析邮件-- 所有邮件,是根据日期,从小到到排序,最近发的最后解析
       // parseMessage(messages);
        
        //解析某一封邮件,根据邮件的序号
        parseMessage(420, 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];
            
            //if(isSeen(msg) ==  false) continue;//已读的邮件直接跳过
            
            if(getFrom(msg).indexOf("[email protected]") == -1) continue;//过滤掉不是454333645发来的邮件
            	
           /* if(isSeen(msg) ==  false){
            	System.out.println("我是已读邮件-------"+getSubject(msg));
            }else {
            	System.out.println("未读======================="+getSubject(msg));
            }*/
            
            
            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");
            
            System.out.println();
         /*   log.info("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
            log.warn("主题: {}" , getSubject(msg));
            log.warn("发件人: {}" , getFrom(msg));
            log.warn("收件人:{}" , getReceiveAddress(msg, null));
            log.warn("发送时间:{}" , getSentDate(msg, null));
            log.warn("是否已读:{}" , isSeen(msg));
            log.warn("邮件优先级:{}" , getPriority(msg));
            log.warn("是否需要回执:{}" , isReplySign(msg));
            log.warn("邮件大小:{}" , msg.getSize() * 1024 + "kb");*/
            boolean isContainerAttachment = isContainAttachment(msg);
            System.out.println("是否包含附件:{}" + isContainerAttachment);
           // log.warn("是否包含附件:{}" ,isContainerAttachment);
           /* if (isContainerAttachment) {
                saveAttachment(msg, "d:\\log\\" + msg.getSubject() + "_" + i + "_"); //保存附件
            }*/
            StringBuffer content = new StringBuffer(30);
            //解析邮件正文
            getMailTextContent(msg, content);
            String emailContent = content.toString();
            if(emailContent != null ) {
            	emailContent = emailContent.replaceAll("\r|\n", "");
            }
            System.out.println("邮件正文:" + emailContent);
            System.out.println("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
            //log.warn("邮件正文:{}" , content);
           // log.info("------------------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 parseMessage(int index, 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
        MimeMessage msg = (MimeMessage) messages[index];
        
        //if(isSeen(msg) ==  false) continue;//已读的邮件直接跳过
        
        if(getFrom(msg).indexOf("[email protected]") > -1){
        	/* if(isSeen(msg) ==  false){
        		System.out.println("我是已读邮件-------"+getSubject(msg));
	        }else {
	        	System.out.println("未读======================="+getSubject(msg));
	        }*/
	        
	        
	        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");
	        
	        System.out.println();
	     /*   log.info("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
	        log.warn("主题: {}" , getSubject(msg));
	        log.warn("发件人: {}" , getFrom(msg));
	        log.warn("收件人:{}" , getReceiveAddress(msg, null));
	        log.warn("发送时间:{}" , getSentDate(msg, null));
	        log.warn("是否已读:{}" , isSeen(msg));
	        log.warn("邮件优先级:{}" , getPriority(msg));
	        log.warn("是否需要回执:{}" , isReplySign(msg));
	        log.warn("邮件大小:{}" , msg.getSize() * 1024 + "kb");*/
	        boolean isContainerAttachment = isContainAttachment(msg);
	        System.out.println("是否包含附件:{}" + isContainerAttachment);
	       // log.warn("是否包含附件:{}" ,isContainerAttachment);
	       /* if (isContainerAttachment) {
	            saveAttachment(msg, "d:\\log\\" + msg.getSubject() + "_" + i + "_"); //保存附件
	        }*/
	        StringBuffer content = new StringBuffer(30);
	        //解析邮件正文
	        getMailTextContent(msg, content);
	        String emailContent = content.toString();
	        if(emailContent != null ) {
	        	emailContent = emailContent.replaceAll("\r|\n", "");
	        }
	        System.out.println("邮件正文:" + emailContent);
	        System.out.println("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
	        //log.warn("邮件正文:{}" , content);
	       // log.info("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
	        System.out.println();
        }
        	
       
    }
 
 
    /**
     * 删除邮件
     *
     * @param messages 要删除邮件列表
     */
    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 
     * @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
     * 

Message.RecipientType.TO 收件人

*

Message.RecipientType.CC 抄送

*

Message.RecipientType.BCC 密送

* * @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 part 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 如果邮件未读返回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/plain") && !isContainTextAttach) {//我得到的是文字正文 content.append(part.getContent().toString()); }if (part.isMimeType("text/html") && !isContainTextAttach) {//我得到的是html标签内容 //content.append(part.getContent().toString()); //System.out.println("我得到的是html标签===="+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 MessagingException, 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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