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测试数据" ; //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测试数据" ; 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); }
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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
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