ReceiveEmail.java

package com.hdst.erp.web.action.oa;

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.Enumeration;
import java.util.List;
import java.util.Properties;

import javax.mail.BodyPart;
import javax.mail.FetchProfile;
import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Header;
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.UIDFolder;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;

import com.sun.mail.pop3.POP3Folder;

/**
 * 郵件發送
 *
 * @author
 *
 */
public class ReceiveEmail {

 private MimeMessage mimeMessage = null;
 private String saveAttachPath = ""; // 附件下載後的存放目錄
 private StringBuffer bodyText = new StringBuffer(); // 存放郵件內容的StringBuffer對象
 private String dateFormat = "yy-MM-dd HH:mm"; // 默認的日前顯示格式

 /**
  * 構造函數,初始化一個MimeMessage對象
  */
 public ReceiveEmail() {
 }

 public ReceiveEmail(MimeMessage mimeMessage) {
  this.mimeMessage = mimeMessage;
  System.out.println("創建一個ReceiveEmail對象....");
 }

 public void setMimeMessage(MimeMessage mimeMessage) {
  this.mimeMessage = mimeMessage;
  System.out.println("設置一個MimeMessage對象...");
 }

 /**
  *  * 獲得發件人的地址和姓名  
  */
 public String getFrom() throws Exception {
  InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();
  String from = address[0].getAddress();
  if (from == null) {
   from = "";
   System.out.println("無法知道發送者.");
  }
  String personal = address[0].getPersonal();

  if (personal == null) {
   personal = "";
   System.out.println("無法知道發送者的姓名.");
  }

  String fromAddr = null;
  if (personal != null || from != null) {
   fromAddr = personal + "<" + from + ">";
   System.out.println("發送者是:" + fromAddr);
  } else {
   System.out.println("無法獲得發送者信息.");
  }
  return fromAddr;
 }

 /**
  *  * 獲得郵件的收件人,抄送,和密送的地址和姓名,根據所傳遞的參數的不同
  *  * "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 emailAddr = address[i].getAddress();
     if (emailAddr == null) {
      emailAddr = "";
     } else {
      System.out.println("轉換之前的emailAddr: " + emailAddr);
      emailAddr = MimeUtility.decodeText(emailAddr);
      System.out.println("轉換之後的emailAddr: " + emailAddr);
     }
     String personal = address[i].getPersonal();
     if (personal == null) {
      personal = "";
     } else {
      System.out.println("轉換之前的personal: " + personal);
      personal = MimeUtility.decodeText(personal);
      System.out.println("轉換之後的personal: " + personal);
     }
     String compositeto = personal + "<" + emailAddr + ">";
     System.out.println("完整的郵件地址:" + compositeto);
     mailAddr += "," + compositeto;
    }
    mailAddr = mailAddr.substring(1);
   }
  } else {
   throw new Exception("錯誤的電子郵件類型!");
  }
  return mailAddr;
 }

 /**
  *  * 獲得郵件主題  
  */
 public String getSubject() throws MessagingException {
  String subject = "";
  try {
   System.out.println("轉換前的subject:" + mimeMessage.getSubject());
   if (mimeMessage.getSubject() == null) {
    subject = "";
   } else {
    subject = MimeUtility.decodeText(mimeMessage.getSubject());
   }
   System.out.println("轉換後的subject: " + subject);
  } catch (Exception exce) {
   exce.printStackTrace();
  }
  return subject;
 }

 /**
  *  * 獲得郵件發送日期  
  */
 public String getSentDate() throws Exception {
  Date sentDate = mimeMessage.getSentDate();
  System.out.println("發送日期 原始類型: " + dateFormat);
  SimpleDateFormat format = new SimpleDateFormat(dateFormat);
  String strSentDate = format.format(sentDate);
  System.out.println("發送日期 可讀類型: " + strSentDate);
  return strSentDate;
 }

 /**
  *  * 獲得郵件正文內容  
  */
 public String getBodyText() {
  return bodyText.toString();
 }

 /**
  *   * 解析郵件,把得到的郵件內容保存到一個StringBuffer對象中,解析郵件
  *   * 主要是根據MimeType類型的不同執行不同的操作,一步一步的解析   
  */

 public void getMailContent(Part part) throws Exception {

  String contentType = part.getContentType();
  // 獲得郵件的MimeType類型
  System.out.println("郵件的MimeType類型: " + contentType);

  int nameIndex = contentType.indexOf("name");

  boolean conName = false;

  if (nameIndex != -1) {
   conName = true;
  }

  System.out.println("郵件內容的類型: " + contentType);

  if (part.isMimeType("text/plain") && conName == false) {
   // text/plain 類型
   bodyText.delete(0, bodyText.length());
   bodyText.append((String) part.getContent());
  } else if (part.isMimeType("text/html") && conName == false) {
   // text/html 類型
   bodyText.delete(0, bodyText.length());
   bodyText.append((String) part.getContent());
  } else if (part.isMimeType("multipart/*")) {
   // 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")) {
   // message/rfc822
   getMailContent((Part) part.getContent());
  } else {

  }
 }

 /**
  *   * 判斷此郵件是否需要回執,如果需要回執返回"true",否則返回"false"  
  */
 public boolean getReplySign() throws MessagingException {

  boolean replySign = false;

  String needReply[] = mimeMessage
    .getHeader("Disposition-Notification-To");

  if (needReply != null) {
   replySign = true;
  }
  if (replySign) {
   System.out.println("該郵件需要回復");
  } else {
   System.out.println("該郵件不需要回復");
  }
  return replySign;
 }

 /**
  * 獲得此郵件的Message-ID   
  */
 public String getMessageId() throws MessagingException {
  String messageID = mimeMessage.getMessageID();
  System.out.println("郵件ID: " + messageID);
  return messageID;
 }

 /**
  * 判斷此郵件是否已讀,如果未讀返回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的長度: " + flag.length);
  for (int i = 0; i < flag.length; i++) {
   if (flag[i] == Flags.Flag.SEEN) {
    isNew = true;
    System.out.println("seen email...");
    break;
   }
  }
  return isNew;
 }

 /**
  * 判斷此郵件是否包含附件
  */
 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;
 }
 
 /**
  * 獲得所有的附件,將所有的附件保存到list中
  * @param list
  * @param part
  * @throws Exception
  */
 public void getAllAttacheMent(List<String> list,Part part) throws Exception{
  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)){
     String fileName = mPart.getFileName();
     
     String formatFileName = MimeUtility.decodeText(fileName);
     list.add(formatFileName);
    }
   }
  }else if (part.isMimeType("message/rfc822")) {
   getAllAttacheMent(list, (Part) part.getContent());
   
  }
 
 }
 /**
  *  * 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());
  }
 }

 /**
  * 設置附件存放路徑
  */
 public void setAttachPath(String attachPath) {
  this.saveAttachPath = attachPath;
 }

 /**
  *  * 設置日期顯示格式  
  */
 public void setDateFormat(String format) throws Exception {
  this.dateFormat = format;
 }

 /**
  *  * 獲得附件存放路徑  
  */
 public String getAttachPath() {
  return saveAttachPath;
 }

 /**
  * 真正的保存附件到指定目錄裏
  */
 public InputStream saveFileu(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("附件的保存地址: " + storeFile.toString());
  return in;

 }

 /**
  *  * 真正的保存附件到指定目錄裏  
  */
 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("附件的保存地址: " + 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("文件保存失敗!");
  } finally {
   bos.close();
   bis.close();
  }
 }

 /**
  * ReceiveEmail類測試
  */
 public static void main(String args[]) throws Exception {
  String host = "pop.163.com"; //
  String username = "zllsjz20110808"; //
  String password = "zhanglele@828"; //

  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);

  FetchProfile profile = new FetchProfile();
  profile.add(UIDFolder.FetchProfileItem.UID);
  profile.add(FetchProfile.Item.ENVELOPE);
  Message[] messages = folder.getMessages();
  folder.fetch(messages, profile);
  POP3Folder inbox = (POP3Folder) folder;
  int j = messages.length - 1;
  for (int i = 0; i < messages.length; i++, j--)
   System.out.println(inbox.getUID(messages[i]));

  Message mge = folder.getMessage(1);
  String sub = mge.getSubject();
  System.out.println("郵件主題:------ " + mge.getSubject());

  Message message[] = folder.getMessages();
  System.out.println("郵件數量: " + message.length);
  ReceiveEmail re = null;

  for (int i = 0; i < message.length; i++) {
   re = new ReceiveEmail((MimeMessage) message[i]);
   System.out.println("郵件 " + i + " 主題: " + re.getSubject());
   System.out.println("郵件 " + i + " 發送時間: " + re.getSentDate());
   System.out.println("郵件 " + i + " 是否需要回復: " + re.getReplySign());
   System.out.println("郵件 " + i + " 是否已讀: " + re.isNew());
   System.out.println("郵件 " + i + " 是否包含附件: "
     + re.isContainAttach((Part) message[i]));
   System.out.println("郵件 " + i + " 發送人地址: " + re.getFrom());
   System.out
     .println("郵件 " + i + " 收信人地址: " + re.getMailAddress("to"));
   System.out.println("郵件 " + i + " 抄送: " + re.getMailAddress("cc"));
   System.out.println("郵件 " + i + " 暗抄: " + re.getMailAddress("bcc"));
   re.setDateFormat("yy年MM月dd日 HH:mm");
   System.out.println("郵件 " + i + " 發送時間: " + re.getSentDate());
   System.out.println("郵件 " + i + " 郵件ID: " + re.getMessageId());
   re.getMailContent((Part) message[i]);
   System.out.println("郵件 " + i + " 正文內容: \r\n" + re.getBodyText());
   re.setAttachPath("e:\\");
   re.saveAttachMent((Part) message[i]);
  }
 }
 
 /**
  * 郵件編碼方式
  */
 private static String CONTENT_TRANSFER_ENCODING = "Content-Transfer-Encoding";
}

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