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用Javamail写的解析MimeMessage的程序


  package coffeecatwebmail;
  
  import java.io.*;
  import java.text.*;
  import java.util.*;
  import javax.mail.*;
  import javax.mail.internet.*;
  
  public class PraseMimeMessage{
    private MimeMessage mimeMessage = null;
    private String saveAttachPath = "";     //附件下载后的存放目录
    private StringBuffer bodytext = new StringBuffer(); //存放邮件内容的StringBuffer对象
    private String dateformat = "yy-MM-dd HH:mm";    //默认的日前显示格式
    
    /**
     * 构造函数,初始化一个MimeMessage对象
     */
    public PraseMimeMessage(){}
    public PraseMimeMessage(MimeMessage mimeMessage){
      this.mimeMessage = mimeMessage;
      System.out.println("create a PraseMimeMessage object........");
    }
  
    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);
            }
            String personal=address[i].getPersonal();
            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 exce){
      }
      return subject;
    }
    
    /**
     * 获得邮件发送日期
     */
    public String getSentDate()throws Exception{
      Date sentdate = mimeMessage.getSentDate();
      SimpleDateFormat format = new SimpleDateFormat(dateformat);
      return format.format(sentdate);
    }
    
    /**
     * 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("seen Message.......");
          break;
        }
      }
      return isnew;
    }
    
    /**
     * 判断此邮件是否包含附件
     */
    public boolean isContainAttach(Part part)throws Exception{
      boolean attachflag = false;
      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(conty
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