ReceiveEmailUtil工具类及应用

来源：互联网发布：apache是什么编辑：程序博客网时间：2024/04/30 13:39

1、ReceiveEmailUtil.java工具类：

package com.company.ssh2.utils;

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

public class ReceiveEmailUtil {

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 ReceiveEmailUtil() {
}
public ReceiveEmailUtil(MimeMessage mimeMessage) {
this.mimeMessage = mimeMessage;
System.out.println("创建一个ReceiveEmail对象....");
}

public void setMimeMessage(MimeMessage mimeMessage) {
this.mimeMessage = mimeMessage;
System.out.println("设置一个MimeMessage对象...");
}

/**
　*　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 = "";
   System.out.println("无法知道发送者.");
  }
  String personal = address[0].getPersonal();

  if(personal == null) {
   personal = "";
   System.out.println("无法知道发送者的姓名.");
  }

  String fromAddr = null;
  if(personal != null || from != null) {
   fromAddr = personal + "<" + from + ">";
   System.out.println("发送者是：" + fromAddr);
  } else {
   System.out.println("无法获得发送者信息.");
  }
  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 emailAddr = address[i].getAddress();
     if(emailAddr == null) {
      emailAddr="";
     } else{
      System.out.println("转换之前的emailAddr: " + emailAddr);
      emailAddr=MimeUtility.decodeText(emailAddr);
      System.out.println("转换之后的emailAddr: " + emailAddr);
     }
     String personal=address[i].getPersonal();
     if(personal==null) {
      personal="";
     } else{
      System.out.println("转换之前的personal: " + personal);
      personal=MimeUtility.decodeText(personal);
      System.out.println("转换之后的personal: " + personal);
     }
     String compositeto = personal + "<" + emailAddr + ">";
     System.out.println("完整的邮件地址：" + compositeto);
     mailAddr+="," + compositeto;
    }
    mailAddr=mailAddr.substring(1);
   }
  } else {
   throw new Exception("错误的电子邮件类型!") ;
  }
  return mailAddr;
}

/**
　*　获得邮件主题
　*/
public String getSubject()throws MessagingException{
  String subject = "";
  try{
   System.out.println("转换前的subject：" + mimeMessage.getSubject());
   subject = MimeUtility.decodeText(mimeMessage.getSubject());
   System.out.println("转换后的subject: " + mimeMessage.getSubject());
   if(subject == null) {
    subject = "";
   }
  } catch(Exception exce) {
   exce.printStackTrace();
  }
  return subject;
}

/**
　*　获得邮件发送日期
　*/
public String getSentDate() throws Exception{
  Date sentDate = mimeMessage.getSentDate();
  System.out.println("发送日期原始类型: " + dateFormat);
  SimpleDateFormat format = new SimpleDateFormat(dateFormat);
  String strSentDate = format.format(sentDate);
  System.out.println("发送日期可读类型: " + strSentDate);
  return strSentDate;
}

/**
　*　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();
  //获得邮件的MimeType类型
  System.out.println("邮件的MimeType类型: " + contentType);

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

  boolean conName = false;

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

  System.out.println("邮件内容的类型:　" + contentType);

  if(part.isMimeType("text/plain") && conName == false ){
   // text/plain 类型
   bodyText.append((String)part.getContent());
  }else if(part.isMimeType("text/html") && conName == false){
   // text/html 类型
   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;
  }
  if(replySign) {
   System.out.println("该邮件需要回复");
  } else {
   System.out.println("该邮件不需要回复");
  }
  return replySign;
}

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

/**
* 判断此邮件是否已读，如果未读返回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的长度:　" + 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("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("文件保存失败!");
  }finally{
   bos.close();
   bis.close();
  }
}
}

2、action中的调用方法：

package com.company.ssh2.utils;

import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Part;
import javax.mail.internet.MimeMessage;

public class TestReceiveEmail {

public static void main(String args[]) throws Exception{
  String host = "172.20.65.50"; //
  String username =""; //
  String password=""; //

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("邮件数量:　" + message.length);
  ReceiveEmailUtil re = null;

  for(int i = 0; i < message.length; i++){
  re = new ReceiveEmailUtil((MimeMessage)message[i]);
  System.out.println("邮件　" + i + "　主题:　" + re.getSubject());
  System.out.println("邮件　" + i + "　发送时间:　" + re.getSentDate());
  System.out.println("邮件　" + i + "　是否需要回复:　" + re.getReplySign());
  System.out.println("邮件　" + i + "　是否已读:　" + re.isNew());
  System.out.println("邮件　" + i + "　是否包含附件:　" + re.isContainAttach((Part)message[i]));
  System.out.println("邮件　" + i + "　发送人地址:　" + re.getFrom());
  System.out.println("邮件　" + i + "　收信人地址:　" + re.getMailAddress("to"));
  System.out.println("邮件　" + i + "　抄送:　" + re.getMailAddress("cc"));
  System.out.println("邮件　" + i + "　暗抄:　" + re.getMailAddress("bcc"));
  re.setDateFormat("yy年MM月dd日　HH:mm");
  System.out.println("邮件　" + i + "　发送时间:　" + re.getSentDate());
  System.out.println("邮件　" + i + "　邮件ID:　" + re.getMessageId());
  re.getMailContent((Part)message[i]);
  System.out.println("邮件　" + i + "　正文内容:　\r\n" + re.getBodyText());
  re.setAttachPath("e:\\");
  re.saveAttachMent((Part)message[i]);
  }
}
}