通过使用java mail来实现读取163邮箱，qq邮箱的邮件内容。
1.代码实现
创建springboot项目，引入依赖包
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<!--mail--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> |
实现类
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import com.sun.mail.imap.IMAPFolder;import com.sun.mail.imap.protocol.IMAPProtocol;import org.apache.tomcat.util.http.fileupload.IOUtils;import org.springframework.util.ObjectUtils; import javax.mail.*;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeUtility;import java.io.*;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.*; public class ShowMail { public static String NORM_DATETIME_PATTERN = "yyyy-MM-dd hh:mm:ss"; private MimeMessage mimeMessage; /** * 附件下载后的存放目录 */ private String saveAttachPath = ""; /** * 存放邮件内容的StringBuffer对象 */ private StringBuffer bodyText = new StringBuffer(); /** * 构造函数,初始化一个MimeMessage对象 * * @param mimeMessage */ public ShowMail(MimeMessage mimeMessage) { this.mimeMessage = mimeMessage; } /** * 获得发件人的地址和姓名 * * @return * @throws MessagingException */ public String getFrom() throws MessagingException { InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom(); String from = address[0].getAddress(); if (from == null) { from = ""; } String personal = address[0].getPersonal(); if (personal == null) { personal = ""; } String fromAddr = null; if (personal != null || from != null) { fromAddr = personal + "<" + from + ">"; } return fromAddr; } /** * 获得邮件的收件人，抄送，和密送的地址和姓名，根据所传递的参数的不同 * * @param type "to"----收件人 "cc"---抄送人地址 "bcc"---密送人地址 * @return * @throws MessagingException * @throws UnsupportedEncodingException */ public String getMailAddress(String type) throws MessagingException, UnsupportedEncodingException { if (ObjectUtils.isEmpty(type)) { return ""; } String addType = type.toUpperCase(); if (!addType.equals("TO") && !addType.equals("CC") && !addType.equals("BCC")) { return ""; } InternetAddress[] address; if (addType.equals("TO")) { address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.TO); } else if (addType.equals("CC")) { address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.CC); } else { address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.BCC); } if (ObjectUtils.isEmpty(address)) { return ""; } StringBuilder mailAddr = new StringBuilder(); String emailAddr; String personal; for (int i = 0; i < address.length; i++) { emailAddr = address[i].getAddress(); if (emailAddr == null) { emailAddr = ""; } else { emailAddr = MimeUtility.decodeText(emailAddr); } personal = address[i].getPersonal(); if (personal == null) { personal = ""; } else { personal = MimeUtility.decodeText(personal); } mailAddr.append(",").append(personal).append("<").append(emailAddr).append(">"); } return mailAddr.toString().substring(1); } /** * 获得邮件主题 * * @return * @throws MessagingException * @throws UnsupportedEncodingException */ public String getSubject() throws MessagingException, UnsupportedEncodingException { String subject = MimeUtility.decodeText(mimeMessage.getSubject()); if (subject == null) { subject = ""; } return subject; } /** * 获得邮件发送日期 * * @return * @throws MessagingException */ public String getSentDate() throws MessagingException { Date sentDate = mimeMessage.getSentDate(); SimpleDateFormat format = new SimpleDateFormat(NORM_DATETIME_PATTERN); return format.format(sentDate); } /** * 获得邮件正文内容 * * @return */ public String getBodyText() { return bodyText.toString(); } /** * 解析邮件，把得到的邮件内容保存到一个StringBuffer对象中，解析邮件 * 主要是根据MimeType类型的不同执行不同的操作，一步一步的解析 * @param part * @throws MessagingException * @throws IOException */ public void getMailContent(Part part) throws MessagingException, IOException { String contentType = part.getContentType(); int nameIndex = contentType.indexOf("name"); boolean conName = false; if (nameIndex != -1) { conName = true; } if (part.isMimeType("text/plain") && conName == false) { bodyText.append((String) part.getContent()); } else if (part.isMimeType("text/html") && conName == false) { bodyText.append((String) part.getContent()); } else if (part.isMimeType("multipart/*")) { Multipart multipart = (Multipart) part.getContent(); int counts = multipart.getCount(); for (int i = 0; i < counts; i++) { this.getMailContent(multipart.getBodyPart(i)); } } else if (part.isMimeType("message/rfc822")) { this.getMailContent((Part) part.getContent()); } } /** * 判断此邮件是否需要回执，如果需要回执返回"true",否则返回"false" * * @return * @throws MessagingException */ public boolean getReplySign() throws MessagingException { boolean replySign = false; String needReply[] = mimeMessage.getHeader("Disposition-Notification-To"); if (needReply != null) { replySign = true; } return replySign; } /** * 判断此邮件是否已读，如果未读返回false,反之返回true * * @return * @throws MessagingException */ public boolean isNew() throws MessagingException { boolean isNew = false; Flags flags = mimeMessage.getFlags(); Flags.Flag[] flag = flags.getSystemFlags(); for (int i = 0; i < flag.length; i++) { if (flag[i] == Flags.Flag.SEEN) { isNew = true; } } return isNew; } /** * 判断此邮件是否包含附件 * * @param part * @return * @throws MessagingException * @throws IOException */ public boolean isContainAttach(Part part) throws MessagingException, IOException { boolean attachFlag = false; if (part.isMimeType("multipart/*")) { Multipart mp = (Multipart) part.getContent(); BodyPart mPart; String conType; for (int i = 0; i < mp.getCount(); i++) { mPart = mp.getBodyPart(i); String disposition = mPart.getDisposition(); if (Part.ATTACHMENT.equals(disposition) || Part.INLINE.equals(disposition)) { attachFlag = true; } else if (mPart.isMimeType("multipart/*")) { attachFlag = this.isContainAttach(mPart); } else { conType = mPart.getContentType(); if (conType.toLowerCase().indexOf("application") != -1 || conType.toLowerCase().indexOf("name") != -1){ attachFlag = true; } } } } else if (part.isMimeType("message/rfc822")) { attachFlag = isContainAttach((Part) part.getContent()); } return attachFlag; } /** * 保存附件 * * @param part * @throws MessagingException * @throws IOException */ public void saveAttachMent(Part part) throws MessagingException, IOException { String fileName; if (part.isMimeType("multipart/*")) { Multipart mp = (Multipart) part.getContent(); BodyPart mPart; for (int i = 0; i < mp.getCount(); i++) { mPart = mp.getBodyPart(i); String disposition = mPart.getDisposition(); if (Part.ATTACHMENT.equals(disposition) || Part.INLINE.equals(disposition)) { fileName = mPart.getFileName(); if (null != fileName && fileName.toLowerCase().indexOf("gb2312") != -1) { fileName = MimeUtility.decodeText(fileName); } this.saveFile(fileName, mPart.getInputStream()); } else if (mPart.isMimeType("multipart/*")) { this.saveAttachMent(mPart); } else { fileName = mPart.getFileName(); if ((fileName != null) && (fileName.toLowerCase().indexOf("GB2312") != -1)) { fileName = MimeUtility.decodeText(fileName); this.saveFile(fileName, mPart.getInputStream()); } } } } else if (part.isMimeType("message/rfc822")) { this.saveAttachMent((Part) part.getContent()); } } /** * 设置附件存放路径 * * @param attachPath */ public void setAttachPath(String attachPath) { this.saveAttachPath = attachPath; } /** * 获得附件存放路径 * * @return */ public String getAttachPath() { return saveAttachPath; } /** * 真正的保存附件到指定目录里 * * @param fileName * @param in * @throws IOException */ private void saveFile(String fileName, InputStream in) throws IOException { String osName = System.getProperty("os.name"); String storeDir = this.getAttachPath(); if (null == osName) { osName = ""; } if (osName.toLowerCase().indexOf("win") != -1) { if (ObjectUtils.isEmpty(storeDir)) storeDir = "C:\\tmp"; } else { storeDir = "/tmp"; }// fileName=fileName.replace("=?", "");// fileName=fileName.replace("?=", "");// fileName = fileName.substring(fileName.length() - 6, fileName.length()); FileOutputStream fos = new FileOutputStream(new File(storeDir + File.separator + fileName)); IOUtils.copy(in, fos); IOUtils.closeQuietly(fos); IOUtils.closeQuietly(in); } /** * 获取163邮箱信息 * * @param host * @param username * @param password * @param protocol * @return * @throws MessagingException */ public static Message[] getWEMessage(String host, String username, String password, String protocol) throws MessagingException { //创建属性对象 Properties props = System.getProperties(); props.setProperty("mail.store.protocol", protocol); //创建会话 Session session = Session.getDefaultInstance(props, null); //存储对象 Store store = session.getStore(protocol); //连接 store.connect(host, username, password); //创建目录对象 Folder folder = store.getFolder("INBOX"); if (folder instanceof IMAPFolder) { IMAPFolder imapFolder = (IMAPFolder)folder; //javamail中使用id命令有校验checkOpened, 所以要去掉id方法中的checkOpened(); imapFolder.doCommand(new IMAPFolder.ProtocolCommand() { public Object doCommand(IMAPProtocol p) throws com.sun.mail.iap.ProtocolException { p.id("FUTONG"); return null; } }); } if(folder != null) { folder.open(Folder.READ_WRITE); } return folder.getMessages(); } /** * 获取qq邮箱信息 * * @param host * @param username * @param password * @param protocol * @return * @throws MessagingException */ public static Message[] getQQMessage(String host, String username, String password, String protocol) throws MessagingException { //创建属性对象 Properties props = new Properties(); props.put("mail.store.protocol", protocol); //创建会话 Session session = Session.getDefaultInstance(props, null); //存储对象 Store store = session.getStore(protocol); //连接 store.connect(host,username,password); //创建目录对象 Folder folder = store.getFolder("Inbox"); if(folder != null) { folder.open(Folder.READ_WRITE); } return folder.getMessages(); } /** * 过滤邮箱信息 * * @param messages * @param fromMail 只读取该邮箱发来的邮件，如果为空则不过滤 * @param startDate 只读取该日期以后的邮件，如果为空则不过滤 * @return * @throws MessagingException */ public static List<Message> filterMessage(Message[] messages, String fromMail, String startDate) throws MessagingException, ParseException { List<Message> messageList = new ArrayList<>(); if (ObjectUtils.isEmpty(messages)) { return messageList; } boolean isEnptyFromMail = ObjectUtils.isEmpty(fromMail); boolean isEnptyStartDate = ObjectUtils.isEmpty(startDate); if (isEnptyFromMail && isEnptyStartDate) { return Arrays.asList(messages); } String from; for (Message message: messages) { from = null; if(message.getFrom() != null) { from = (message.getFrom()[0]).toString(); } if (isEnptyFromMail) { if (message.getSentDate() != null && new SimpleDateFormat(NORM_DATETIME_PATTERN).parse(startDate).getTime() > message.getSentDate().getTime()) { continue; } } else if (null != from && from.contains(fromMail)) { if (!isEnptyStartDate && new SimpleDateFormat(NORM_DATETIME_PATTERN).parse(startDate).getTime() > message.getSentDate().getTime()) { continue; } } else { continue; } messageList.add(message); } return messageList; } /** * 打印邮件 * * @param messageList * @throws IOException * @throws MessagingException */ public static void printMailMessage(List<Message> messageList) throws IOException, MessagingException { System.out.println("邮件数量:" + messageList.size()); ShowMail re; Message message; for (int i = 0, leng = messageList.size(); i < leng; i++) { message = messageList.get(i); re = new ShowMail((MimeMessage) message); System.out.println("邮件【" + i + "】主题:" + re.getSubject()); System.out.println("邮件【" + i + "】发送时间:" + re.getSentDate()); System.out.println("邮件【" + i + "】是否需要回复:" + re.getReplySign()); System.out.println("邮件【" + i + "】是否已读:" + re.isNew()); System.out.println("邮件【" + i + "】是否包含附件:" + re.isContainAttach( message)); System.out.println("邮件【" + i + "】发送人地址:" + re.getFrom()); System.out.println("邮件【" + i + "】收信人地址:" + re.getMailAddress("to")); System.out.println("邮件【" + i + "】抄送:" + re.getMailAddress("cc")); System.out.println("邮件【" + i + "】暗抄:" + re.getMailAddress("bcc")); System.out.println("邮件【" + i + "】发送时间:" + re.getSentDate()); System.out.println("邮件【" + i + "】邮件ID:" + ((MimeMessage) message).getMessageID()); re.getMailContent(message); System.out.println("邮件【" + i + "】正文内容:\r\n" + re.getBodyText()); re.setAttachPath("D:\\Download\\mailFile\\"); re.saveAttachMent(message); } } public static void main(String[] args) throws MessagingException, IOException, ParseException { //163登录信息 //邮件服务器 String host = "mail.xx.com"; //邮箱账号 String username = "xx"; //授权码 String password = "yy"; //协议 String protocol = "imaps"; //只读取该邮箱发来的邮件 String fromMail = null; //只读取该日期以后的邮件 String startDate = null; List<Message> messageList = filterMessage(getWEMessage(host, username, password, protocol), fromMail, startDate); printMailMessage(messageList); //qq登录信息 String host2 = "imap.qq.com"; String username2 = "xx"; String password2 = "yy"; // String protocol2 = "imaps"; String protocol2 = "pop3"; String fromMail2 = null; String startDate2 = null; List<Message> messageList2 = filterMessage(getQQMessage(host2, username2, password2, protocol2), fromMail2, startDate2); printMailMessage(messageList2); } } |
2.配置授权码
163邮箱：
qq邮箱：
3.实现效果：
运行main方法，查看控制台：
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邮件数量:xx邮件【0】主题:欢迎您使用xx邮箱！邮件【0】发送时间:xx邮件【0】是否需要回复:false邮件【0】是否已读:true邮件【0】是否包含附件:false邮件【0】发送人地址:xx邮件【0】收信人地址:xx邮件【0】抄送:邮件【0】暗抄:邮件【0】发送时间:xx邮件【0】邮件ID:xx邮件【0】正文内容:<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>欢迎使用</title> <style> body, div, p, img { padding: 0; margin: 0; font-family: 'Microsoft Yahei', "PingFang SC", "Hiragino Sans GB", "wenquanyi micro hei", Arial, Helvetica, "STHeiti", sans-serif; } .contain { width: 700px; margin: 0 auto; font-size: 0; } .wrap { position: relative; } .wrap .welcome { position: absolute; width: 290px; left: 75px; top: 100px; font-size: 18px; color: #fff; line-height: 32px; font-weight: 500; } .wrap .welcome p.indentation { font-size: 16px; font-weight: normal; } .wrap a { position: absolute; display: block; width: 104px; height: 39px; } .wrap a.mobile{ left: 501px; top: 434px; } .wrap a.pc{ left: 501px; top: 485px; } </style></head><body> <div class="contain"> <div class="wrap"> <div class="welcome"> <p class="indentation-title">尊敬的xx：</p> <p class="indentation">您好，您的邮箱已开通。</p> </div> </div> </div></body></html> |
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原文链接：https://blog.csdn.net/weixin_39220472/article/details/122745908
