下载邮箱附件

package cn.com.dhcc.app.excel.service;


import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
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.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;


import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


import com.sun.mail.imap.IMAPFolder;
import com.sun.mail.imap.IMAPStore;


/**
 * 获取邮件,下载附件
 * 
 * @日期:2016-1-25上午10:15:04
 * @作者:hp
 * @版权所有：
 */
@Service
public class DownloadExcel {
//private static Logger logger = Log.getLogger("MAIL");


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




/**
* 构造函数,初始化一个MimeMessage对象
*/
public DownloadExcel() {
}


public DownloadExcel(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 getFrom() throws Exception {
InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();
String from = address[0].getAddress();
if (from == null) {
from = "";
logger.debug("无法知道发送者.");
}
String personal = address[0].getPersonal();


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


String fromAddr = null;
if (personal != null || from != null) {
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 emailAddr = address[i].getAddress();
if (emailAddr == null) {
emailAddr = "";
} else {
emailAddr = MimeUtility.decodeText(emailAddr);
}
String personal = address[i].getPersonal();
if (personal == null) {
personal = "";
} else {
personal = MimeUtility.decodeText(personal);
}
String compositeto = personal + "<" + emailAddr + ">";
//logger.debug("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 {
subject = MimeUtility.decodeText(mimeMessage.getSubject());
if (subject == null) {
subject = "";
}
} catch (Exception exce) {
exce.printStackTrace();
}
return subject.trim();
}


/**
* 　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
//logger.debug("邮件的MimeType类型: " + contentType);


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


boolean conName = false;


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


//logger.debug("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) {
//logger.debug("该邮件需要回复");
} else {
//logger.debug("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();
//logger.debug("邮件ID: " + messageID);
return messageID;
}

/**
     *　获得邮件发送日期 　
     */
    public Date getSentDate() throws Exception {
        Date sentDate = mimeMessage.getSentDate();
        String strSentDate = DTUtil.format(sentDate);
//        logger.debug("发送日期 可读类型: " + strSentDate);
        return DTUtil.toDate(strSentDate);
    }


/**
* 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;
//logger.debug("此邮件已读");
// 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("utf-8") != -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("utf-8") != -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
* 
* @param attachPath
*/
public void setAttachPath(String attachPath) {
this.saveAttachPath = attachPath;
}


/**
* 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);
//logger.debug("附件的保存地址:　" + storeFile.toString());
//mailPath += storeFile.toString().trim() + "|";
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();
}
}


/**
* 邮件接收测试类
* 
* @param args
* @throws Exception
*/
public static void main(String args[]) throws Exception {
String host = "mail.dhcc.com.cn"; // 【邮件服务器地址】 
String username ="[e-mail]";// 【收件人邮箱】 
String password = ""; // 【收件人邮箱密码】 
// 获取默认会话
Properties prop = System.getProperties();
prop.put("mail.imap.host", host);
prop.put("mail.imap.auth.plain.disable", "true");
Session mailsession = Session.getInstance(prop, null);
mailsession.setDebug(false); // 是否启用debug模式
IMAPFolder folder = null;
IMAPStore store = null;
try {
store = (IMAPStore) mailsession.getStore("imap"); 
// 使用imap会话机制，连接服务器
store.connect(host, username, password);
folder = (IMAPFolder) store.getFolder("INBOX");// 收件箱 // 使用只读方式打开收件箱 
folder.open(Folder.READ_WRITE); //得到收件箱文件夹信息，获取邮件列表
Message[] message = folder.getMessages();
System.out.println("邮件数量:　" + message.length);
DownloadExcel re = null;
for (int i = 0; i < message.length; i++) {
re = new DownloadExcel((MimeMessage) message[i]);
System.out.println("邮件　" + i + "　主题:　" + re.getSubject());
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"));
System.out.println("邮件　" + i + "　邮件ID:　" + re.getMessageId());
re.getMailContent((Part) message[i]);
re.setAttachPath("/tmp/MailXlsx");
System.out.println("----------------End------------------");
}
} catch (MessagingException ex) {
System.err.println("不能以读写方式打开邮箱!");
ex.printStackTrace();
}


}
 

//-----------------------------------------------对邮件添加筛选条件-------------------------------------------------------

// // 对邮件进行筛选（过滤时间大于某值且用户名为serder的邮件）
// SearchTerm andTerm = new AndTerm(new SearchTerm[] {
// new FromStringTerm(new String(
// serder.getBytes("ISO-8859-1"), "gbk")),
// new SentDateTerm(0, "时间") });