MailUtil

public class MailUtil {
 
 private static final Log log = LogFactory.getLog(MailUtil.class);  
 /**
  * 發送電子郵件（可單發，群發，密件發送，但不能加附件）
  * @param mail
  * @return
  */
 public static boolean sendSimpleMail(MailInfo mail){
  try {
   MailSender sender = getMailSender();
   SimpleMailMessage smm = getSMM(mail);
   sender.send(smm);
   log.info("發送Email成功");
   return true;
  } catch (MailException e) {
   e.printStackTrace();
   log.debug("發送Email失敗");
   return false;
  }
 }
 
 /**
  *
  * 發送複雜郵件（可單發，群發，密件發送，但不能加附件）
  * @param mail
  * @return
  */
 public static boolean sendMimeMessage(final MailInfo mail){
  try {
   JavaMailSender sender = (JavaMailSender)getMailSender();

   MimeMessagePreparator preparator = new MimeMessagePreparator(){

    public void prepare(MimeMessage msg) throws MessagingException {
    
     msg.setFrom(new InternetAddress(mail.getFrom()));
     if(mail.getTo()!= null && !mail.getTo().equals("")){
      msg.setRecipients(Message.RecipientType.TO, //單個地址
        InternetAddress.parse(mail.getTo()));
     }
     if(mail.getToArray()!= null && mail.getToArray().length>0){
      msg.setRecipients(Message.RecipientType.TO, //發送多個地址
        InternetAddress.parse(strArrayFromStr(mail.getToArray())));
     }
     if(mail.getToBccArray()!= null && mail.getToBccArray().length>0){
      msg.setRecipients(Message.RecipientType.BCC, //發送多個地址
        InternetAddress.parse(strArrayFromStr(mail.getToBccArray())));
     } 
     
     msg.setSubject(mail.getSubject());
     Multipart mp = new MimeMultipart();
     msg.setContent(mp);
     
     MimeBodyPart mbpContent = new MimeBodyPart();//增加文本內容
     if(mail.getContentType().equals(MailInfo.CONTENTTYPE_TEXT)){ //text格式郵件
      mbpContent.setText(mail.getText());
     }else{//html格式郵件
      mbpContent.setContent(mail.getText(), MailInfo.CONTEENTYPE_HTML_CONTENT);
     }     
     mp.addBodyPart(mbpContent);
     
     for (Iterator iter = mail.getFile().iterator(); iter.hasNext();) {
      String  filePath = (String ) iter.next();
      MimeBodyPart mbpFile = new MimeBodyPart();//增加附件
      FileDataSource fds = new FileDataSource(filePath);//路徑
      mbpFile.setDataHandler(new DataHandler(fds));
      try {
       mbpFile.setFileName(MimeUtility.encodeText(fds.getName()));//編碼處理
      } catch (UnsupportedEncodingException e) {
       e.printStackTrace();
      }
      mp.addBodyPart(mbpFile);
     }
     msg.setSentDate(new Date());
     
    }
   };
   
   sender.send(preparator);
   log.info("發送Email成功");
   return true;
  } catch (MailException e) {
   e.printStackTrace();
   log.debug("發送Email失敗");
   return false;
  }
 }
 
 public static String strArrayFromStr(String val[]){
  String returnVal = "";
  for (int i = 0; i < val.length; i++) {
   returnVal = (i==0 ? val[i]:returnVal+","+ val[i]);
  }
  return returnVal;
 }
 
 /**
  * 取得郵件發送
  * @return
  */
 public static MailSender getMailSender(){
  MailSender mailSender = (MailSender)SpringContextUtil.getApplicationContext().getBean("mailSender");
  return mailSender;
 }
 
 /**
  * to(單發), toArray(群發), toBccArray(密件群發），只能有一個
  * @param mail
  * @return
  */
 public static SimpleMailMessage getSMM(MailInfo mail){
  SimpleMailMessage smm = new SimpleMailMessage();
  smm.setSubject(mail.getSubject());
  smm.setText(mail.getText());
  smm.setFrom(mail.getFrom());
  if(mail.getTo()!= null && !mail.getTo().equals("")){
   smm.setTo(mail.getTo());
  }
  if(mail.getToArray()!= null && mail.getToArray().length>0){
   smm.setTo(mail.getToArray());
  }
  if(mail.getToBccArray()!= null && mail.getToBccArray().length>0){
   smm.setBcc(mail.getToBccArray());
  }  
  return smm;
 }

}