pop收邮件

package com.mail;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

import javax.mail.BodyPart;
import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;

public class ComplePOPMail {
 private static final String ComplePOPMail = null;
 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 = "yyyy-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 ComplePOPMail(MimeMessage mimeMessage) {
  this.mimeMessage = mimeMessage;
  System.out.println("create a POPMail object........");
 }

 /**
  * 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;
  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();
  }
 }

 /**
  * 日期字符串比较
  */
 public int Compare(String dateParameter, String sentDate) {
  System.out.println(sentDate.compareTo(dateParameter));
  return sentDate.compareTo(dateParameter);
 }

 /**
  * ComplePOPMail类测试
  */
 public static void main(String args[]) throws Exception {
  String host = "pop3.sina.com";
  String username = "yang4187668";
  String password = "xiaoyaozi";

  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_WRITE);
  Message message[] = folder.getMessages();
  System.out.println("Messages's length: " + message.length);
  ComplePOPMail popMail = null;

  for (int i = 0; i < message.length; i++) {
   popMail = new ComplePOPMail((MimeMessage) message[i]);

   if (popMail.isNew())
    continue;
   String dateParameter = "2009-03-25";
   if (popMail.Compare(dateParameter, popMail.getSentDate()) < 0)
    continue;
   System.out.println("Message " + i + " 主题: " + popMail.getSubject());
   System.out.println("Message " + i + " 接收时间: " + popMail.getSentDate());
   System.out.println("Message " + i + " 是否需要回执: "
     + popMail.getReplySign());
   System.out.println("Message " + i + " 是否已读: " + popMail.isNew());
   System.out.println("Message " + i + " 是否包含附件: "
     + popMail.isContainAttach((Part) message[i]));
   System.out.println("Message " + i + " 发件人姓名地址: " + popMail.getFrom());
   System.out.println("Message " + i + " to: "
     + popMail.getMailAddress("to"));
   System.out.println("Message " + i + " cc: "
     + popMail.getMailAddress("cc"));
   System.out.println("Message " + i + " bcc: "
     + popMail.getMailAddress("bcc"));

   popMail.setDateFormat("yy年MM月dd日 HH:mm");

   System.out.println("Message " + i + " Message-ID: "
     + popMail.getMessageId());

   // pmm.getMailContent((Part) message[i]);
   // System.out.println("Message " + i + " 正文: ");
   // System.out.println(MimeUtility.decodeText(pmm.getBodyText()));
   // pmm.setAttachPath("c://tmp//coffeecat1124");
   // pmm.saveAttachMent((Part) message[i]);
   System.out.println();
  }
 }
}