用Javamail写的邮件接收程序

news/2024/7/24 2:42:17
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(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;
 }
   
/**
 * 【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( "gb2312") != -1){
       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( "GB2312") != -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="c://tmp";
  }else{
   separator = "/";
   storedir = "/tmp";
  }
  File storefile = new File(storedir+separator+fileName);
  System.out.println("storefile's path: "+storefile.toString());
 //for(int i=0;storefile.exists();i++){
 //storefile = new File(storedir+separator+fileName+i);
 //}
 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{
  String host = "主机名/ip";     //【pop.mail.yahoo.com.cn】
  String username ="用户名";     //【wwp_1124】
  String password ="密码";       //【........】
  Properties props = new Properties();
  Session session = Session.getDefaultInstance(props, null);
  Store store = session.getStore("pop3");
  store.connect(host, username, password);
  Folder folder = store.getFolder("INBOX");
  folder.open(Folder.READ_ONLY);
  Message message[] = folder.getMessages();
  System.out.println("Messages's length: "+message.length);
  PraseMimeMessage pmm = null;
  for(int i=0;i<message.length;i++){
   pmm = new PraseMimeMessage((MimeMessage)message[i]);
   System.out.println("Message "+i+" subject: "+pmm.getSubject());
   System.out.println("Message "+i+" sentdate: "+pmm.getSentDate());
   System.out.println("Message "+i+" replysign: "+pmm.getReplySign());
   System.out.println("Message "+i+" hasRead: "+pmm.isNew());
   System.out.println("Message "+i+"  containAttachment: "+pmm.isContainAttach((Part)message[i]));
   System.out.println("Message "+i+" form: "+pmm.getFrom());
   System.out.println("Message "+i+" to: "+pmm.getMailAddress("to"));
   System.out.println("Message "+i+" cc: "+pmm.getMailAddress("cc"));
   System.out.println("Message "+i+" bcc: "+pmm.getMailAddress("bcc"));
   pmm.setDateFormat("yy年MM月dd日 HH:mm");
   System.out.println("Message "+i+" sentdate: "+pmm.getSentDate());
   System.out.println("Message "+i+" Message-ID: "+pmm.getMessageId());
   pmm.getMailContent((Part)message[i]);
   System.out.println("Message "+i+" bodycontent: /r/n"+pmm.getBodyText());
   pmm.setAttachPath("c://tmp//coffeecat1124");
   pmm.saveAttachMent((Part)message[i]);
  }
 }
}


 

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