java Mail 发送、接收邮件

1.发送邮件：

public class MailConfig{
 private String showName;// 显示的名称
 
 private String host;// 邮件服务器
 /**
  * 使用的用户名,  如发送邮件为 [e-mail]
  */
 private String user;// 用户名
 private String password;// 密码

}

 

public class DefaultSendMail implements SendMail{
 MailConfig mc;
 public DefaultSendMail(MailConfig mc) {
  this.mc = mc;
 }

 

//发送单个邮件

 public void send(String toMmail, String title,
   String mailContent) {
  try {
   Properties props = new Properties();
   Session sendMailSession;
   props.put("mail.smtp.auth", "true");
   props.put("mail.smtp.host", mc.getHost()); // smtp主机名。
   props.put("mail.smtp.user", mc.getUser()); // 发送方邮件地址。
   props.put("mail.smtp.password", mc.getPassword()); // 邮件密码。

   PopupAuthenticator popA = new PopupAuthenticator();// 邮件安全认证。
   popA.performCheck(mc.getUser(), mc.getPassword()); // 填写用户名及密码

   sendMailSession = Session.getInstance(props, popA);
   Message newMessage = new MimeMessage(sendMailSession);
   newMessage.setFrom(new InternetAddress(mc.getUser(),mc.getShowName()));
   newMessage.setRecipient(Message.RecipientType.TO,
     new InternetAddress(toMmail)); // 接收方邮件地址
   newMessage.setSubject(title);
   //newMessage.setSubject(MimeUtility.encodeText(title,"GB2312","B"));////使用指定的base64方式编码,并指定编码内容的字符集是gb2312
   newMessage.setSentDate(new Date());
   newMessage.setContent(mailContent,"text/plain; charset=UTF-8");
   //newMessage.setContent(mailContent,"text/html; charset=UTF-8"); //发送正文
   Transport.send(newMessage);
  } catch (Exception e) {
   System.out.print("预警异常");
  }
 }

 

/*
  * 群发邮件

  * @Param from 发件人
  * @Param toMmail 收件人，以逗号分隔
  * @Param title 主题
  * @Param mailContent 内容
  */
 
 public void sendMore(String from,String toMmail, String title, String mailContent) {
  try {
   Properties props = new Properties();
   props.put("mail.smtp.host", mc.getHost()); // 指定SMTP服务器
   props.put("mail.smtp.auth", "true"); // 指定是否需要SMTP验证

   Session mailSession = Session.getInstance(props, null);
   mailSession.setDebug(true); // 是否在控制台显示debug信息

   MimeMessage message = new MimeMessage(mailSession);
   //message.setFrom(new InternetAddress("[e-mail]")); // 发件人
   message.setFrom(new InternetAddress(from)); // 发件人
   
   message.setRecipients(Message.RecipientType.TO, InternetAddress
     .parse(toMmail)); // 这个里面的和单独的发送给某人是不同的
   // message.setRecipient(Message.RecipientType.TO, new
   // InternetAddress(address));
   message.setSubject(title); // 邮件主题
   message.setText(mailContent); // 邮件内容
   message.saveChanges();

   Transport transport = mailSession.getTransport("smtp");
   transport.connect(mc.getHost(), from, mc.getPassword());//不能把from换成mc.getUser()?
   transport.sendMessage(message, message.getAllRecipients());
   transport.close();
  } catch (Exception e) {
   System.out.print("预警异常");
  }
 }

 

//单个邮件带附件发送
 public void sendAndAttach(String toMmail, String title, String mailContent,String file) {
  try {
   Properties props = new Properties();
   Session sendMailSession;
   props.put("mail.smtp.auth", "true");
   props.put("mail.smtp.host", mc.getHost()); // smtp主机名。
   props.put("mail.smtp.user", mc.getUser()); // 发送方邮件地址。
   props.put("mail.smtp.password", mc.getPassword()); // 邮件密码。

   PopupAuthenticator popA = new PopupAuthenticator();// 邮件安全认证。
   popA.performCheck(mc.getUser(), mc.getPassword()); // 填写用户名及密码

   sendMailSession = Session.getInstance(props, popA);
   Message newMessage = new MimeMessage(sendMailSession);
   newMessage.setFrom(new InternetAddress(mc.getUser(), mc
     .getShowName()));
   newMessage.setRecipient(Message.RecipientType.TO,
     new InternetAddress(toMmail)); // 接收方邮件地址
   newMessage.setSubject(title);
   newMessage.setSentDate(new Date());
   
   // //发送正文
   Multipart mp = new MimeMultipart(); 
   BodyPart content = new MimeBodyPart();       
   content.setContent(mailContent, "text/plain; charset=UTF-8");
   mp.addBodyPart(content);
   
   //发送附件
   BodyPart bp = new MimeBodyPart();       
   FileDataSource fileds = new FileDataSource(file);       
   bp.setDataHandler(new DataHandler(fileds));       
   bp.setFileName(fileds.getName());       
   mp.addBodyPart(bp);     
   newMessage.setContent(mp);   
   Transport.send(newMessage);

  } catch (Exception e) {
   System.out.print("预警异常");
  }
 }

 

 public class PopupAuthenticator extends Authenticator {
  String username = null;
  String password = null;

  public PopupAuthenticator() {
  }

  public PasswordAuthentication performCheck(String user, String pass) {
   username = user;
   password = pass;
   return getPasswordAuthentication();
  }

  @Override
  protected PasswordAuthentication getPasswordAuthentication() {
   return new PasswordAuthentication(username, password);
  }
 }
}

 

2.接收邮件（只要有账号和密码，就可以取出这个账号的邮件）：

/**  
 * 有一封邮件就需要建立一个ReciveMail对象  
 */  
public class Rece {   
    private MimeMessage mimeMessage = null;//消息对象   
    private String saveAttachPath = ""; //附件下载后的存放目录   
    private StringBuffer bodytext = new StringBuffer();//存放邮件内容   
    private String dateformat = "yy-MM-dd HH:mm"; //默认的日前显示格式   
    /**
     * 初使化reciveOneMail时初使化MimeMessage对象
     */
    public Rece(MimeMessage mimeMessage) {   
        this.mimeMessage = mimeMessage;   
    }   
    /**
     * 设置mimeMessage对象
     */
    public void setMimeMessage(MimeMessage mimeMessage) {   
        this.mimeMessage = mimeMessage;   
    }   
  
    /**  
     * 获得发件人的地址和姓名  
     */  
    public String getFrom() throws Exception {   
        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 = 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 "to"----收件人
     *
     * "cc"---抄送人地址
     *
     * "bcc"---密送人地址  
     */  
    public String getMailAddress(String type) throws Exception {   
        String mailaddr = "";   
        String addtype = type.toUpperCase();   
        InternetAddress[] address = null;   
        if (addtype.equals("TO") || addtype.equals("CC")|| addtype.equals("BCC")) {   
            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 (address != null) {   
                for (int i = 0; i < address.length; i++) {   
                    String email = address[i].getAddress();   
                    if (email == null)   
                        email = "";   
                    else {   
                        email = MimeUtility.decodeText(email);//得到mail   
                    }   
                    String personal = address[i].getPersonal();//得到发件人   
                    if (personal == null)   
                        personal = "";   
                    else {   
                        personal = MimeUtility.decodeText(personal);   
                    }   
                    String compositeto = personal + "<" + email + ">";   
                    mailaddr += "," + compositeto;   
                }   
                mailaddr = mailaddr.substring(1);   
            }   
        } else {   
            throw new Exception("Error emailaddr type!");   
        }   
        return mailaddr;   
    }   
  
    /**  
     * 获得邮件主题  
     */  
    public String getSubject() throws MessagingException {   
        String subject = "";   
        try {   
            subject = MimeUtility.decodeText(mimeMessage.getSubject());   
            if (subject == null) 
            {
                subject = ""; 
            }
        } catch (Exception e)
        {
         e.printStackTrace();
        }   
        return subject;   
    }   
  
    /**  
     * 获得邮件发送日期  
     */  
    public String getSentDate() throws Exception {   
        Date sentdate = mimeMessage.getSentDate();   
        SimpleDateFormat format = new SimpleDateFormat(dateformat);  
        if(sentdate!=null)
        {
         return format.format(sentdate);   
        }
        else
        {
         return null;
        }
    }   
  
    /**  
     * 获得邮件正文内容  
     */  
    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  
     */  
    public void getMailContent(Part part) throws Exception {   
        String contenttype = part.getContentType();   
        int nameindex = contenttype.indexOf("name");   
        boolean conname = false;   
        if (nameindex != -1)   
            conname = true;   
        System.out.println("CONTENTTYPE: " + contenttype);   
        if (part.isMimeType("text/plain") && !conname) {   
            bodytext.append((String) part.getContent());   
        } else if (part.isMimeType("text/html") && !conname) {   
            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++) {   
                getMailContent(multipart.getBodyPart(i));   
            }   
        } else if (part.isMimeType("message/rfc822")) {   
            getMailContent((Part) part.getContent());   
        } else {}   
    }   
  
    /**   
     * 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"  
     */   
    public boolean getReplySign() throws MessagingException {   
        boolean replysign = false;   
        String needreply[] = mimeMessage   
                .getHeader("Disposition-Notification-To");   
        if (needreply != null) {   
            replysign = true;   
        }   
        return replysign;   
    }   
  
    /**  
     * 获得此邮件的Message-ID  
     */  
    public String getMessageId() throws MessagingException {   
        return mimeMessage.getMessageID();   
    }   
  
    /**  
     * 判断此邮件是否已读，如果未读返回false,反之返回true  
     */  
    public boolean isNew() throws MessagingException {   
        boolean isnew = false;   
        Flags flags = ((Message) mimeMessage).getFlags();   
        Flags.Flag[] flag = flags.getSystemFlags();   
        System.out.println("flags's length: " + flag.length);   
        for (int i = 0; i < flag.length; i++) {   
            if (flag[i] == Flags.Flag.SEEN) {   
                isnew = true;   
                System.out.println("已查看的邮件");   
                break;   
            }   
        }   
        return isnew;   
    }   
  
    /**  
     * 判断此邮件是否包含附件  
     */  
    public boolean isContainAttach(Part part) throws Exception {   
        boolean attachflag = false;   
        @SuppressWarnings("unused")
  String contentType = part.getContentType();   
        if (part.isMimeType("multipart/*")) {   
            Multipart mp = (Multipart) part.getContent();   
            for (int i = 0; i < mp.getCount(); i++) {   
                BodyPart mpart = mp.getBodyPart(i);   
                String disposition = mpart.getDisposition();   
                if ((disposition != null)   
                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition   
                                .equals(Part.INLINE))))   
                    attachflag = true;   
                else if (mpart.isMimeType("multipart/*")) {   
                    attachflag = isContainAttach((Part) mpart);   
                } else {   
                    String contype = mpart.getContentType();   
                    if (contype.toLowerCase().indexOf("application") != -1)   
                        attachflag = true;   
                    if (contype.toLowerCase().indexOf("name") != -1)   
                        attachflag = true;   
                }   
            }   
        } else if (part.isMimeType("message/rfc822")) {   
            attachflag = isContainAttach((Part) part.getContent());   
        }   
        return attachflag;   
    }   
  
    /**   
     * 在本机上保存附件   
     */   
    public void saveAttachMent(Part part) throws Exception {   
        String fileName = "";   
        if (part.isMimeType("multipart/*")) {   
            Multipart mp = (Multipart) part.getContent();   
            for (int i = 0; i < mp.getCount(); i++) {   
                BodyPart mpart = mp.getBodyPart(i);   
                String disposition = mpart.getDisposition();   
                if ((disposition != null)   
                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition   
                                .equals(Part.INLINE)))) {   
                    fileName = mpart.getFileName();   
                    if (fileName.toLowerCase().indexOf("gbk") != -1) {    //文件名字可能出现乱码
                        fileName = MimeUtility.decodeText(fileName);   
                    }   
                    saveFile(fileName, mpart.getInputStream());   
                } else if (mpart.isMimeType("multipart/*")) {   
                    saveAttachMent(mpart);   
                } else {   
                    fileName = mpart.getFileName();   
                    if ((fileName != null)   
                            && (fileName.toLowerCase().indexOf("gbk") != -1)) {   
                        fileName = MimeUtility.decodeText(fileName);  
                        saveFile(fileName, mpart.getInputStream());   
                    }   
                }   
            }   
        } else if (part.isMimeType("message/rfc822")) {   
            saveAttachMent((Part) part.getContent());   
        }   
    }   
  
    /**   
     * 设置附件存放路径   
     */   
  
    public void setAttachPath(String attachpath) {   
        this.saveAttachPath = attachpath;   
    }   
  
    /**  
     * 设置日期显示格式 
     */  
    public void setDateFormat(String format) throws Exception {   
        this.dateformat = format;   
    }   
  
    /**  
     * 获得附件存放路径
     */  
    public String getAttachPath() {   
        return saveAttachPath;   
    }   
  
    /**  
     * 真正的保存附件到指定目录里   
     */  
    private void saveFile(String fileName, InputStream in) throws Exception {   
        String osName = System.getProperty("os.name");   
        String storedir = getAttachPath();   
        String separator = "";   
        if (osName == null)   
            osName = "";   
        if (osName.toLowerCase().indexOf("win") != -1) {   
            separator = "\\";  
            if (storedir == null || storedir.equals(""))  
                storedir = "d:\\workweb";  
        } else {  
            separator = "/";  
            storedir = "/workweb";  
        }  
        File storefile = new File(storedir + separator + fileName);  
        System.out.println("storefile's path: " + storefile.toString());  
        BufferedOutputStream bos = null;  
        BufferedInputStream bis = null;  
        try {  
            bos = new BufferedOutputStream(new FileOutputStream(storefile));  
            bis = new BufferedInputStream(in);  
            int c;  
            while ((c = bis.read()) != -1) {  
                bos.write(c);  
                bos.flush();  
            }  
        } catch (Exception exception) {  
            exception.printStackTrace();  
            throw new Exception("文件保存失败!");  
        } finally {  
            bos.close();  
            bis.close();  
        }  
    }  
 
    /**  
     * PraseMimeMessage类测试  
     */  
    public static void main(String args[]) throws Exception {  
        Properties props = System.getProperties();  
        props.put("mail.smtp.host", "smtp.126.com");  
        props.put("mail.smtp.auth", "true");  
        Session session = Session.getDefaultInstance(props, null);  
        URLName urln = new URLName("pop3", "pop3.126.com", 110, null,  
                "zhangwei", "123456");  
        Store store = session.getStore(urln);  
        store.connect();  
        Folder folder = store.getFolder("INBOX");  
        folder.open(Folder.READ_ONLY);  
        Message message[] = folder.getMessages();  
        System.out.println("Messages's length: " + message.length);  
        Rece pmm = null;  
        for (int i = 0; i < message.length; i++) {  
            System.out.println("======================");  
            pmm = new Rece((MimeMessage) message[i]);  
            System.out.println("Message " + i + " subject: " + pmm.getSubject());       
            System.out.println("Message " + i + " to: "+ pmm.getMailAddress("to"));  
            pmm.setDateFormat("yy年MM月dd日 HH:mm");  
            System.out.println("Message " + i + " senddate: "+ pmm.getSentDate());   
            // 获得邮件内容 
            pmm.getMailContent((Part) message[i]);  
            System.out.println("Message " + i + " bodycontent: \r\n"  
                    + pmm.getBodyText());  
            pmm.setAttachPath("d:\\Mail");   
            pmm.saveAttachMent((Part) message[i]);   
            System.out.println("======================");
        }   
    }   
}