读取邮箱服务需引入com.sun.mail.javax.mail
maven jar包配置

<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.6.2</version>
</dependency>

创建一个工具类PraseMimeMessage 里面包含了获得邮箱信息的方法，附带测试方法

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
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 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;
 }

 

 public void setMimeMessage(MimeMessage mimeMessage) {
  this.mimeMessage = mimeMessage;
 }

 

 /**
  * 　*　获得发件人的地址和姓名 　
  */
 public String getFrom1() 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 　
  * 
  * @throws Exception
  */
 public String getMailAddress(String type) {
  String mailaddr = "";
  try {
   String addtype = type.toUpperCase();
   InternetAddress[] address = null;
   if (addtype.equals("TO") || addtype.equals("CC")
     || addtype.equals("BBC")) {
    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 {
   }
  } catch (Exception e) {
   // TODO: handle exception
  }
  return mailaddr;
 }

 

 /**
  * 　　*　获得邮件主题 　　
  */
 public String getSubject() {
  String subject = "";
  try {
   subject = MimeUtility.decodeText(mimeMessage.getSubject());
   if (subject == null)
    subject = "";
  } catch (Exception e) {
   // TODO: handle exception
  }
  return subject;
 }

 

 /**
  * 　　*　获得邮件发送日期 　　
  */
 public String getSendDate() throws Exception {
  Date senddate = mimeMessage.getSentDate();
  SimpleDateFormat format = new SimpleDateFormat(dateformat);
  return format.format(senddate);
 }

 

 /**
  * 　　*　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) {//如果是html则保存
  // bodytext.append((String) part.getContent());
      String fileName = this.getSubject() + ".htm";
      saveFile(fileName, part.getInputStream());
  } 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 {
  }
 }

 

 /**
  * 　*　获得邮件正文内容 　　
  */
 public String getBodyText() {
  return bodytext.toString();
 }

 

 /**
  * 　　*　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" 　　
  * 
  * @throws MessagingException
  */
 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 　　
  * 
  * @throws MessagingException
  */
 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】 　　
  * 
  * @throws MessagingException
  */
 public boolean isNew() throws MessagingException {
  boolean isnew = false;
  Flags flags = ((Message) mimeMessage).getFlags();
  Flags.Flag[] flag = flags.getSystemFlags();
  for (int i = 0; i < flag.length; i++) {
   if (flag[i] == Flags.Flag.SEEN) {
    isnew = true;
    break;
   }
  }
  return isnew;
 }

 

 /**
  * 　*　判断此邮件是否包含附件 　
  * 
  * @throws MessagingException
  */
 public boolean isContainAttach(Part part) throws Exception {
  boolean attachflag = false;
  String contentType = part.getContentType();
  if (part.isMimeType("multipart/*")) {
   Multipart mp = (Multipart) part.getContent();
   // 获取附件名称可能包含多个附件
   for (int j = 0; j < mp.getCount(); j++) {
    BodyPart mpart = mp.getBodyPart(j);
    String disposition = mpart.getDescription();
    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】 　
  * 
  * @throws Exception
  * @throws IOException
  * @throws MessagingException
  * @throws Exception
  */
 public void saveAttachMent(Part part) throws Exception {
  String fileName = "";
  if (part.isMimeType("multipart/*")) {
   Multipart mp = (Multipart) part.getContent();
   for (int j = 0; j < mp.getCount(); j++) {
    BodyPart mpart = mp.getBodyPart(j);
    String disposition = mpart.getDescription();
    if ((disposition != null)
      && ((disposition.equals(Part.ATTACHMENT)) || (disposition
        .equals(Part.INLINE)))) {
     fileName = mpart.getFileName();
     if (fileName.toLowerCase().indexOf("GBK") != -1) {
      fileName = MimeUtility.decodeText(fileName);
     }
     saveFile(fileName, mpart.getInputStream());
    } else if (mpart.isMimeType("multipart/*")) {
     fileName = mpart.getFileName();
    } else {
     fileName = mpart.getFileName();
     if ((fileName != null)) {
      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) {
  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) {
   // 如果是window 操作系统
   separator = "/";
   if (storedir == null || storedir.equals(""))
    storedir = "c:\tmp";
  } else {
   // 如果是其他的系统
   separator = "/";
   storedir = "/tmp";
  }
  File strorefile = new File(storedir + separator + fileName);
  BufferedOutputStream bos = null;
  BufferedInputStream bis = null;
  try {
   bos = new BufferedOutputStream(new FileOutputStream(strorefile));
   bis = new BufferedInputStream(in);
   int c;
   while ((c = bis.read()) != -1) {
    bos.write(c);
    bos.flush();
   }
  } catch (Exception e) {
   // TODO: handle exception
  } finally {
   bos.close();
   bis.close();
  }
 }

 

 /**
  * 　*　PraseMimeMessage类测试 　
  * 
  * @throws Exception
  */
 public static void main(String[] args) throws Exception {
  String host = "smtp.way-s.cn";//邮箱服务器，可自行替换
  String username = "XXX@way-s.cn";//这里替换成真实的邮箱名称
  String password = "XXX";//替换邮箱密码
  String protocol = "imap";//邮箱服务协议
  
  Properties props = new Properties();
    /*
     * props.setProperty("mail.transport.protocol", protocol);
     * props.setProperty("mail.smtp.host", host);
     */
  
  Session session = Session.getDefaultInstance(props, null);// 获取连接
  Store store = session.getStore(protocol);// 获取Store对象
  store.connect(host, username, password);
  Folder folder = store.getFolder("INBOX");// 获得用户的邮件帐户
  folder.open(Folder.READ_ONLY);// 设置对邮件帐户的访问权限，也可设置为Folder.READ_WRITE
  Message message[] = folder.getMessages();// 得到邮箱帐户中的所有邮件
  System.out.println("邮件数量:　" + message.length);
  PraseMimeMessage pmm = null;
  for (int i = 0; i < message.length; i++) {
   System.out.println("****************************************第"
     + (i + 1) + "封邮件**********************************");
   pmm = new PraseMimeMessage((MimeMessage) message[i]);
   
   
   System.out.println("主题 :" + pmm.getSubject());
   pmm.setDateFormat("yy年MM月dd日 HH:mm");
   System.out.println("发送时间 :" + pmm.getSendDate());
   System.out.println("是否回执 :" + pmm.getReplySign());
   System.out.println("是否包含附件 :"
     + pmm.isContainAttach((Part) message[i]));
   System.out.println("发件人 :" + pmm.getFrom1());
   System.out.println("收件人 :" + pmm.getMailAddress("TO"));
   System.out.println("抄送地址 :" + pmm.getMailAddress("CC"));
   System.out.println("密送地址 :" + pmm.getMailAddress("BCC"));
   System.out.println("邮件ID :" + i + ":" + pmm.getMessageId());
   pmm.setAttachPath("d:/tmp/mail"); // 设置邮件附件的保存路径，正文是html的也保存在这个地址了
   pmm.getMailContent((Part) message[i]); // 根据内容的不同解析邮件，正文是html的以htm格式存储文件
   pmm.saveAttachMent((Part) message[i]); // 保存附件
   System.out.println("邮件正文 :" + pmm.getBodyText());
   System.out.println("*********************************第" + (i + 1)
     + "封邮件结束*************************************");
  }
 }
}