javamail收邮件 ,转自http://www.blogjava.net/kissyan4916/articles/279130.html
关键技术:
- javax.mail.Store:该类实现特定邮件协议(如POP3)上的读、写、监视、查找等操作。通过它的getFolder方法打开一个javax.mail.Folder。
- javax.mail.Folder:该类用于描述邮件的分级组织,如收件箱、草稿箱。它的open方法打开分级组织,close方法关闭分级组织,getMessages方法获得分级组织中的邮件,getNewMessageCount方法获得分级组织中新邮件的数量,getUnreadMessageCount方法获得分级组织中未读邮件的数量
- 根据MimeMessage的getFrom和getRecipients方法获得邮件的发件人和收件人地址列表,得到的是InternetAddress数组,根据InternetAddress的getAddress方法获得邮件地址,根据InternetAddress的getPersonal方法获得邮件地址的个人信息。
- MimeMessage的getSubject、getSentDate、getMessageID方法获得邮件的主题、发送日期和邮件的ID(表示邮件)。
- 通过MimeMessage的getContent方法获得邮件的内容,如果邮件是MIME邮件,那么得到的是一个Multipart的对象,如果是一共普通的文本邮件,那么得到的是BodyPart对象。Multipart可以包含多个BodyPart,而BodyPart本身又可以是Multipart。BodyPart的MimeType类型为“multipart/*”时,表示它是一个Mutipart。
- 但一个BodyPart的disposition属性等于Part.ATTACHMENT或者Part.INLINE常量时,表示它带有附件。通过BodyPart的getInputStream方法可以获得附件的输入流。
package
book.email;
import java.io.File;
import java.util.Properties;
/**
* 收邮件的基本信息
*/
public class MailReceiverInfo {
// 邮件服务器的IP、端口和协议
private String mailServerHost;
private String mailServerPort = " 110 " ;
private String protocal = " pop3 " ;
// 登陆邮件服务器的用户名和密码
private String userName;
private String password;
// 保存邮件的路径
private String attachmentDir = " C:/temp/ " ;
private String emailDir = " C:/temp/ " ;
private String emailFileSuffix = " .eml " ;
// 是否需要身份验证
private boolean validate = true ;
/**
* 获得邮件会话属性
*/
public Properties getProperties(){
Properties p = new Properties();
p.put( " mail.pop3.host " , this .mailServerHost);
p.put( " mail.pop3.port " , this .mailServerPort);
p.put( " mail.pop3.auth " , validate ? " true " : " false " );
return p;
}
public String getProtocal() {
return protocal;
}
public void setProtocal(String protocal) {
this .protocal = protocal;
}
public String getAttachmentDir() {
return attachmentDir;
}
public void setAttachmentDir(String attachmentDir) {
if ( ! attachmentDir.endsWith(File.separator)){
attachmentDir = attachmentDir + File.separator;
}
this .attachmentDir = attachmentDir;
}
public String getEmailDir() {
return emailDir;
}
public void setEmailDir(String emailDir) {
if ( ! emailDir.endsWith(File.separator)){
emailDir = emailDir + File.separator;
}
this .emailDir = emailDir;
}
public String getEmailFileSuffix() {
return emailFileSuffix;
}
public void setEmailFileSuffix(String emailFileSuffix) {
if ( ! emailFileSuffix.startsWith( " . " )){
emailFileSuffix = " . " + emailFileSuffix;
}
this .emailFileSuffix = emailFileSuffix;
}
public String getMailServerHost() {
return mailServerHost;
}
public void setMailServerHost(String mailServerHost) {
this .mailServerHost = mailServerHost;
}
public String getMailServerPort() {
return mailServerPort;
}
public void setMailServerPort(String mailServerPort) {
this .mailServerPort = mailServerPort;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this .password = password;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this .userName = userName;
}
public boolean isValidate() {
return validate;
}
public void setValidate( boolean validate) {
this .validate = validate;
}
}
import java.io.File;
import java.util.Properties;
/**
* 收邮件的基本信息
*/
public class MailReceiverInfo {
// 邮件服务器的IP、端口和协议
private String mailServerHost;
private String mailServerPort = " 110 " ;
private String protocal = " pop3 " ;
// 登陆邮件服务器的用户名和密码
private String userName;
private String password;
// 保存邮件的路径
private String attachmentDir = " C:/temp/ " ;
private String emailDir = " C:/temp/ " ;
private String emailFileSuffix = " .eml " ;
// 是否需要身份验证
private boolean validate = true ;
/**
* 获得邮件会话属性
*/
public Properties getProperties(){
Properties p = new Properties();
p.put( " mail.pop3.host " , this .mailServerHost);
p.put( " mail.pop3.port " , this .mailServerPort);
p.put( " mail.pop3.auth " , validate ? " true " : " false " );
return p;
}
public String getProtocal() {
return protocal;
}
public void setProtocal(String protocal) {
this .protocal = protocal;
}
public String getAttachmentDir() {
return attachmentDir;
}
public void setAttachmentDir(String attachmentDir) {
if ( ! attachmentDir.endsWith(File.separator)){
attachmentDir = attachmentDir + File.separator;
}
this .attachmentDir = attachmentDir;
}
public String getEmailDir() {
return emailDir;
}
public void setEmailDir(String emailDir) {
if ( ! emailDir.endsWith(File.separator)){
emailDir = emailDir + File.separator;
}
this .emailDir = emailDir;
}
public String getEmailFileSuffix() {
return emailFileSuffix;
}
public void setEmailFileSuffix(String emailFileSuffix) {
if ( ! emailFileSuffix.startsWith( " . " )){
emailFileSuffix = " . " + emailFileSuffix;
}
this .emailFileSuffix = emailFileSuffix;
}
public String getMailServerHost() {
return mailServerHost;
}
public void setMailServerHost(String mailServerHost) {
this .mailServerHost = mailServerHost;
}
public String getMailServerPort() {
return mailServerPort;
}
public void setMailServerPort(String mailServerPort) {
this .mailServerPort = mailServerPort;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this .password = password;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this .userName = userName;
}
public boolean isValidate() {
return validate;
}
public void setValidate( boolean validate) {
this .validate = validate;
}
}
package
book.email;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.util.Date;
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.NoSuchProviderException;
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;
/**
* 邮件接收器,目前支持pop3协议。
* 能够接收文本、HTML和带有附件的邮件
*/
public class MailReceiver {
// 收邮件的参数配置
private MailReceiverInfo receiverInfo;
// 与邮件服务器连接后得到的邮箱
private Store store;
// 收件箱
private Folder folder;
// 收件箱中的邮件消息
private Message[] messages;
// 当前正在处理的邮件消息
private Message currentMessage;
private String currentEmailFileName;
public MailReceiver(MailReceiverInfo receiverInfo) {
this .receiverInfo = receiverInfo;
}
/**
* 收邮件
*/
public void receiveAllMail() throws Exception{
if ( this .receiverInfo == null ){
throw new Exception( " 必须提供接收邮件的参数! " );
}
// 连接到服务器
if ( this .connectToServer()) {
// 打开收件箱
if ( this .openInBoxFolder()) {
// 获取所有邮件
this .getAllMail();
this .closeConnection();
} else {
throw new Exception( " 打开收件箱失败! " );
}
} else {
throw new Exception( " 连接邮件服务器失败! " );
}
}
/**
* 登陆邮件服务器
*/
private boolean connectToServer() {
// 判断是否需要身份认证
MyAuthenticator authenticator = null ;
if ( this .receiverInfo.isValidate()) {
// 如果需要身份认证,则创建一个密码验证器
authenticator = new MyAuthenticator( this .receiverInfo.getUserName(),
this .receiverInfo.getPassword());
}
// 创建session
Session session = Session.getInstance( this .receiverInfo
.getProperties(), authenticator);
// 创建store,建立连接
try {
this .store = session.getStore( this .receiverInfo.getProtocal());
} catch (NoSuchProviderException e) {
System.out.println( " 连接服务器失败! " );
return false ;
}
System.out.println( " connecting " );
try {
this .store.connect();
} catch (MessagingException e) {
System.out.println( " 连接服务器失败! " );
return false ;
}
System.out.println( " 连接服务器成功 " );
return true ;
}
/**
* 打开收件箱
*/
private boolean openInBoxFolder() {
try {
this .folder = store.getFolder( " INBOX " );
// 只读
folder.open(Folder.READ_ONLY);
return true ;
} catch (MessagingException e) {
System.err.println( " 打开收件箱失败! " );
}
return false ;
}
/**
* 断开与邮件服务器的连接
*/
private boolean closeConnection() {
try {
if ( this .folder.isOpen()) {
this .folder.close( true );
}
this .store.close();
System.out.println( " 成功关闭与邮件服务器的连接! " );
return true ;
} catch (Exception e) {
System.out.println( " 关闭和邮件服务器之间连接时出错! " );
}
return false ;
}
/**
* 获取messages中的所有邮件
* @throws MessagingException
*/
private void getAllMail() throws MessagingException {
// 从邮件文件夹获取邮件信息
this .messages = this .folder.getMessages();
System.out.println( " 总的邮件数目: " + messages.length);
System.out.println( " 新邮件数目: " + this .getNewMessageCount());
System.out.println( " 未读邮件数目: " + this .getUnreadMessageCount());
// 将要下载的邮件的数量。
int mailArrayLength = this .getMessageCount();
System.out.println( " 一共有邮件 " + mailArrayLength + " 封 " );
int errorCounter = 0 ; // 邮件下载出错计数器
int successCounter = 0 ;
for ( int index = 0 ; index < mailArrayLength; index ++ ) {
try {
this .currentMessage = (messages[index]); // 设置当前message
System.out.println( " 正在获取第 " + index + " 封邮件 " );
this .showMailBasicInfo();
getMail(); // 获取当前message
System.out.println( " 成功获取第 " + index + " 封邮件 " );
successCounter ++ ;
} catch (Throwable e) {
errorCounter ++ ;
System.err.println( " 下载第 " + index + " 封邮件时出错 " );
}
}
System.out.println( " ------------------ " );
System.out.println( " 成功下载了 " + successCounter + " 封邮件 " );
System.out.println( " 失败下载了 " + errorCounter + " 封邮件 " );
System.out.println( " ------------------ " );
}
/**
* 显示邮件的基本信息
*/
private void showMailBasicInfo() throws Exception{
showMailBasicInfo( this .currentMessage);
}
private void showMailBasicInfo(Message message) throws Exception {
System.out.println( " -------- 邮件ID: " + this .getMessageId()
+ " --------- " );
System.out.println( " From: " + this .getFrom());
System.out.println( " To: " + this .getTOAddress());
System.out.println( " CC: " + this .getCCAddress());
System.out.println( " BCC: " + this .getBCCAddress());
System.out.println( " Subject: " + this .getSubject());
System.out.println( " 发送时间:: " + this .getSentDate());
System.out.println( " 是新邮件? " + this .isNew());
System.out.println( " 要求回执? " + this .getReplySign());
System.out.println( " 包含附件? " + this .isContainAttach());
System.out.println( " ------------------------------ " );
}
/**
* 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
*/
private String getTOAddress() throws Exception {
return getMailAddress( " TO " , this .currentMessage);
}
private String getCCAddress() throws Exception {
return getMailAddress( " CC " , this .currentMessage);
}
private String getBCCAddress() throws Exception {
return getMailAddress( " BCC " , this .currentMessage);
}
/**
* 获得邮件地址
* @param type 类型,如收件人、抄送人、密送人
* @param mimeMessage 邮件消息
* @return
* @throws Exception
*/
private String getMailAddress(String type, Message mimeMessage)
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 ++ ) {
// 先获取邮件地址
String email = address[i].getAddress();
if (email == null ){
email = "" ;
} else {
email = MimeUtility.decodeText(email);
}
// 再取得个人描述信息
String personal = address[i].getPersonal();
if (personal == null ){
personal = "" ;
} else {
personal = MimeUtility.decodeText(personal);
}
// 将个人描述信息与邮件地址连起来
String compositeto = personal + " < " + email + " > " ;
// 多个地址时,用逗号分开
mailaddr += " , " + compositeto;
}
mailaddr = mailaddr.substring( 1 );
}
} else {
throw new Exception( " 错误的地址类型!! " );
}
return mailaddr;
}
/**
* 获得发件人的地址和姓名
* @throws Exception
*/
private String getFrom() throws Exception {
return getFrom( this .currentMessage);
}
private String getFrom(Message mimeMessage) throws Exception {
InternetAddress[] address = (InternetAddress[]) mimeMessage.getFrom();
// 获得发件人的邮箱
String from = address[ 0 ].getAddress();
if (from == null ){
from = "" ;
}
// 获得发件人的描述信息
String personal = address[ 0 ].getPersonal();
if (personal == null ){
personal = "" ;
}
// 拼成发件人完整信息
String fromaddr = personal + " < " + from + " > " ;
return fromaddr;
}
/**
* 获取messages中message的数量
* @return
*/
private int getMessageCount() {
return this .messages.length;
}
/**
* 获得收件箱中新邮件的数量
* @return
* @throws MessagingException
*/
private int getNewMessageCount() throws MessagingException {
return this .folder.getNewMessageCount();
}
/**
* 获得收件箱中未读邮件的数量
* @return
* @throws MessagingException
*/
private int getUnreadMessageCount() throws MessagingException {
return this .folder.getUnreadMessageCount();
}
/**
* 获得邮件主题
*/
private String getSubject() throws MessagingException {
return getSubject( this .currentMessage);
}
private String getSubject(Message mimeMessage) throws MessagingException {
String subject = "" ;
try {
// 将邮件主题解码
subject = MimeUtility.decodeText(mimeMessage.getSubject());
if (subject == null ){
subject = "" ;
}
} catch (Exception exce) {
}
return subject;
}
/**
* 获得邮件发送日期
*/
private Date getSentDate() throws Exception {
return getSentDate( this .currentMessage);
}
private Date getSentDate(Message mimeMessage) throws Exception {
return mimeMessage.getSentDate();
}
/**
* 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"
*/
private boolean getReplySign() throws MessagingException {
return getReplySign( this .currentMessage);
}
private boolean getReplySign(Message mimeMessage) 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
*/
private String getMessageId() throws MessagingException {
return getMessageId( this .currentMessage);
}
private String getMessageId(Message mimeMessage) throws MessagingException {
return ((MimeMessage) 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
*/
private boolean isNew() throws MessagingException {
return isNew( this .currentMessage);
}
private boolean isNew(Message mimeMessage) throws MessagingException {
boolean isnew = false ;
Flags flags = 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
*/
private boolean isContainAttach() throws Exception {
return isContainAttach( this .currentMessage);
}
private boolean isContainAttach(Part part) throws Exception {
boolean attachflag = false ;
if (part.isMimeType( " multipart/* " )) {
// 如果邮件体包含多部分
Multipart mp = (Multipart) part.getContent();
// 遍历每部分
for ( int i = 0 ; i < mp.getCount(); i ++ ) {
// 获得每部分的主体
BodyPart bodyPart = mp.getBodyPart(i);
String disposition = bodyPart.getDisposition();
if ((disposition != null )
&& ((disposition.equals(Part.ATTACHMENT)) || (disposition
.equals(Part.INLINE)))){
attachflag = true ;
} else if (bodyPart.isMimeType( " multipart/* " )) {
attachflag = isContainAttach((Part) bodyPart);
} else {
String contype = bodyPart.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;
}
/**
* 获得当前邮件
*/
private void getMail() throws Exception {
try {
this .saveMessageAsFile(currentMessage);
this .parseMessage(currentMessage);
} catch (IOException e) {
throw new IOException( " 保存邮件出错,检查保存路径 " );
} catch (MessagingException e) {
throw new MessagingException( " 邮件转换出错 " );
} catch (Exception e) {
e.printStackTrace();
throw new Exception( " 未知错误 " );
}
}
/**
* 保存邮件源文件
*/
private void saveMessageAsFile(Message message) {
try {
// 将邮件的ID中尖括号中的部分做为邮件的文件名
String oriFileName = getInfoBetweenBrackets( this .getMessageId(message)
.toString());
// 设置文件后缀名。若是附件则设法取得其文件后缀名作为将要保存文件的后缀名,
// 若是正文部分则用.htm做后缀名
String emlName = oriFileName;
String fileNameWidthExtension = this .receiverInfo.getEmailDir()
+ oriFileName + this .receiverInfo.getEmailFileSuffix();
File storeFile = new File(fileNameWidthExtension);
for ( int i = 0 ; storeFile.exists(); i ++ ) {
emlName = oriFileName + i;
fileNameWidthExtension = this .receiverInfo.getEmailDir()
+ emlName + this .receiverInfo.getEmailFileSuffix();
storeFile = new File(fileNameWidthExtension);
}
this .currentEmailFileName = emlName;
System.out.println( " 邮件消息的存储路径: " + fileNameWidthExtension);
// 将邮件消息的内容写入ByteArrayOutputStream流中
ByteArrayOutputStream baos = new ByteArrayOutputStream();
message.writeTo(baos);
// 读取邮件消息流中的数据
StringReader in = new StringReader(baos.toString());
// 存储到文件
saveFile(fileNameWidthExtension, in);
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* 解析邮件
*/
private void parseMessage(Message message) throws IOException,
MessagingException {
Object content = message.getContent();
// 处理多部分邮件
if (content instanceof Multipart) {
handleMultipart((Multipart) content);
} else {
handlePart(message);
}
}
/*
* 解析Multipart
*/
private void handleMultipart(Multipart multipart) throws MessagingException,
IOException {
for ( int i = 0 , n = multipart.getCount(); i < n; i ++ ) {
handlePart(multipart.getBodyPart(i));
}
}
/*
* 解析指定part,从中提取文件
*/
private void handlePart(Part part) throws MessagingException, IOException {
String disposition = part.getDisposition();
String contentType = part.getContentType();
String fileNameWidthExtension = "" ;
// 获得邮件的内容输入流
InputStreamReader sbis = new InputStreamReader(part.getInputStream());
// 没有附件的情况
if (disposition == null ) {
if ((contentType.length() >= 10 )
&& (contentType.toLowerCase().substring( 0 , 10 )
.equals( " text/plain " ))) {
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .txt " ;
} else if ((contentType.length() >= 9 ) // Check if html
&& (contentType.toLowerCase().substring( 0 , 9 )
.equals( " text/html " ))) {
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .html " ;
} else if ((contentType.length() >= 9 ) // Check if html
&& (contentType.toLowerCase().substring( 0 , 9 )
.equals( " image/gif " ))) {
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .gif " ;
} else if ((contentType.length() >= 11 )
&& contentType.toLowerCase().substring( 0 , 11 ).equals(
" multipart/* " )) {
// System.out.println("multipart body: " + contentType);
handleMultipart((Multipart) part.getContent());
} else { // Unknown type
// System.out.println("Other body: " + contentType);
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .txt " ;
}
// 存储内容文件
System.out.println( " 保存邮件内容到: " + fileNameWidthExtension);
saveFile(fileNameWidthExtension, sbis);
return ;
}
// 各种有附件的情况
String name = "" ;
if (disposition.equalsIgnoreCase(Part.ATTACHMENT)) {
name = getFileName(part);
// System.out.println("Attachment: " + name + " : "
// + contentType);
fileNameWidthExtension = this .receiverInfo.getAttachmentDir() + name;
} else if (disposition.equalsIgnoreCase(Part.INLINE)) {
name = getFileName(part);
// System.out.println("Inline: " + name + " : "
// + contentType);
fileNameWidthExtension = this .receiverInfo.getAttachmentDir() + name;
} else {
// System.out.println("Other: " + disposition);
}
// 存储各类附件
if ( ! fileNameWidthExtension.equals( "" )) {
System.out.println( " 保存邮件附件到: " + fileNameWidthExtension);
saveFile(fileNameWidthExtension, sbis);
}
}
private String getFileName(Part part) throws MessagingException,
UnsupportedEncodingException {
String fileName = part.getFileName();
fileName = MimeUtility.decodeText(fileName);
String name = fileName;
if (fileName != null ) {
int index = fileName.lastIndexOf( " / " );
if (index != - 1 ) {
name = fileName.substring(index + 1 );
}
}
return name;
}
/**
* 保存文件内容
* @param fileName 文件名
* @param input 输入流
* @throws IOException
*/
private void saveFile(String fileName, Reader input) throws IOException {
// 为了放置文件名重名,在重名的文件名后面天上数字
File file = new File(fileName);
// 先取得文件名的后缀
int lastDot = fileName.lastIndexOf( " . " );
String extension = fileName.substring(lastDot);
fileName = fileName.substring( 0 , lastDot);
for ( int i = 0 ; file.exists(); i ++ ) {
// 如果文件重名,则添加i
file = new File(fileName + i + extension);
}
// 从输入流中读取数据,写入文件输出流
FileWriter fos = new FileWriter(file);
BufferedWriter bos = new BufferedWriter(fos);
BufferedReader bis = new BufferedReader(input);
int aByte;
while ((aByte = bis.read()) != - 1 ) {
bos.write(aByte);
}
// 关闭流
bos.flush();
bos.close();
bis.close();
}
/**
* 获得尖括号之间的字符
* @param str
* @return
* @throws Exception
*/
private String getInfoBetweenBrackets(String str) throws Exception {
int i, j; // 用于标识字符串中的"<"和">"的位置
if (str == null ) {
str = " error " ;
return str;
}
i = str.lastIndexOf( " < " );
j = str.lastIndexOf( " > " );
if (i != - 1 && j != - 1 ){
str = str.substring(i + 1 , j);
}
return str;
}
public static void main(String[] args) throws Exception {
MailReceiverInfo receiverInfo = new MailReceiverInfo();
receiverInfo.setMailServerHost( " pop.163.com " );
receiverInfo.setMailServerPort( " 110 " );
receiverInfo.setValidate( true );
receiverInfo.setUserName( " *** " );
receiverInfo.setPassword( " *** " );
receiverInfo.setAttachmentDir( " C:/temp/mail/ " );
receiverInfo.setEmailDir( " C:/temp/mail/ " );
MailReceiver receiver = new MailReceiver(receiverInfo);
receiver.receiveAllMail();
}
}
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.util.Date;
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.NoSuchProviderException;
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;
/**
* 邮件接收器,目前支持pop3协议。
* 能够接收文本、HTML和带有附件的邮件
*/
public class MailReceiver {
// 收邮件的参数配置
private MailReceiverInfo receiverInfo;
// 与邮件服务器连接后得到的邮箱
private Store store;
// 收件箱
private Folder folder;
// 收件箱中的邮件消息
private Message[] messages;
// 当前正在处理的邮件消息
private Message currentMessage;
private String currentEmailFileName;
public MailReceiver(MailReceiverInfo receiverInfo) {
this .receiverInfo = receiverInfo;
}
/**
* 收邮件
*/
public void receiveAllMail() throws Exception{
if ( this .receiverInfo == null ){
throw new Exception( " 必须提供接收邮件的参数! " );
}
// 连接到服务器
if ( this .connectToServer()) {
// 打开收件箱
if ( this .openInBoxFolder()) {
// 获取所有邮件
this .getAllMail();
this .closeConnection();
} else {
throw new Exception( " 打开收件箱失败! " );
}
} else {
throw new Exception( " 连接邮件服务器失败! " );
}
}
/**
* 登陆邮件服务器
*/
private boolean connectToServer() {
// 判断是否需要身份认证
MyAuthenticator authenticator = null ;
if ( this .receiverInfo.isValidate()) {
// 如果需要身份认证,则创建一个密码验证器
authenticator = new MyAuthenticator( this .receiverInfo.getUserName(),
this .receiverInfo.getPassword());
}
// 创建session
Session session = Session.getInstance( this .receiverInfo
.getProperties(), authenticator);
// 创建store,建立连接
try {
this .store = session.getStore( this .receiverInfo.getProtocal());
} catch (NoSuchProviderException e) {
System.out.println( " 连接服务器失败! " );
return false ;
}
System.out.println( " connecting " );
try {
this .store.connect();
} catch (MessagingException e) {
System.out.println( " 连接服务器失败! " );
return false ;
}
System.out.println( " 连接服务器成功 " );
return true ;
}
/**
* 打开收件箱
*/
private boolean openInBoxFolder() {
try {
this .folder = store.getFolder( " INBOX " );
// 只读
folder.open(Folder.READ_ONLY);
return true ;
} catch (MessagingException e) {
System.err.println( " 打开收件箱失败! " );
}
return false ;
}
/**
* 断开与邮件服务器的连接
*/
private boolean closeConnection() {
try {
if ( this .folder.isOpen()) {
this .folder.close( true );
}
this .store.close();
System.out.println( " 成功关闭与邮件服务器的连接! " );
return true ;
} catch (Exception e) {
System.out.println( " 关闭和邮件服务器之间连接时出错! " );
}
return false ;
}
/**
* 获取messages中的所有邮件
* @throws MessagingException
*/
private void getAllMail() throws MessagingException {
// 从邮件文件夹获取邮件信息
this .messages = this .folder.getMessages();
System.out.println( " 总的邮件数目: " + messages.length);
System.out.println( " 新邮件数目: " + this .getNewMessageCount());
System.out.println( " 未读邮件数目: " + this .getUnreadMessageCount());
// 将要下载的邮件的数量。
int mailArrayLength = this .getMessageCount();
System.out.println( " 一共有邮件 " + mailArrayLength + " 封 " );
int errorCounter = 0 ; // 邮件下载出错计数器
int successCounter = 0 ;
for ( int index = 0 ; index < mailArrayLength; index ++ ) {
try {
this .currentMessage = (messages[index]); // 设置当前message
System.out.println( " 正在获取第 " + index + " 封邮件 " );
this .showMailBasicInfo();
getMail(); // 获取当前message
System.out.println( " 成功获取第 " + index + " 封邮件 " );
successCounter ++ ;
} catch (Throwable e) {
errorCounter ++ ;
System.err.println( " 下载第 " + index + " 封邮件时出错 " );
}
}
System.out.println( " ------------------ " );
System.out.println( " 成功下载了 " + successCounter + " 封邮件 " );
System.out.println( " 失败下载了 " + errorCounter + " 封邮件 " );
System.out.println( " ------------------ " );
}
/**
* 显示邮件的基本信息
*/
private void showMailBasicInfo() throws Exception{
showMailBasicInfo( this .currentMessage);
}
private void showMailBasicInfo(Message message) throws Exception {
System.out.println( " -------- 邮件ID: " + this .getMessageId()
+ " --------- " );
System.out.println( " From: " + this .getFrom());
System.out.println( " To: " + this .getTOAddress());
System.out.println( " CC: " + this .getCCAddress());
System.out.println( " BCC: " + this .getBCCAddress());
System.out.println( " Subject: " + this .getSubject());
System.out.println( " 发送时间:: " + this .getSentDate());
System.out.println( " 是新邮件? " + this .isNew());
System.out.println( " 要求回执? " + this .getReplySign());
System.out.println( " 包含附件? " + this .isContainAttach());
System.out.println( " ------------------------------ " );
}
/**
* 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
*/
private String getTOAddress() throws Exception {
return getMailAddress( " TO " , this .currentMessage);
}
private String getCCAddress() throws Exception {
return getMailAddress( " CC " , this .currentMessage);
}
private String getBCCAddress() throws Exception {
return getMailAddress( " BCC " , this .currentMessage);
}
/**
* 获得邮件地址
* @param type 类型,如收件人、抄送人、密送人
* @param mimeMessage 邮件消息
* @return
* @throws Exception
*/
private String getMailAddress(String type, Message mimeMessage)
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 ++ ) {
// 先获取邮件地址
String email = address[i].getAddress();
if (email == null ){
email = "" ;
} else {
email = MimeUtility.decodeText(email);
}
// 再取得个人描述信息
String personal = address[i].getPersonal();
if (personal == null ){
personal = "" ;
} else {
personal = MimeUtility.decodeText(personal);
}
// 将个人描述信息与邮件地址连起来
String compositeto = personal + " < " + email + " > " ;
// 多个地址时,用逗号分开
mailaddr += " , " + compositeto;
}
mailaddr = mailaddr.substring( 1 );
}
} else {
throw new Exception( " 错误的地址类型!! " );
}
return mailaddr;
}
/**
* 获得发件人的地址和姓名
* @throws Exception
*/
private String getFrom() throws Exception {
return getFrom( this .currentMessage);
}
private String getFrom(Message mimeMessage) throws Exception {
InternetAddress[] address = (InternetAddress[]) mimeMessage.getFrom();
// 获得发件人的邮箱
String from = address[ 0 ].getAddress();
if (from == null ){
from = "" ;
}
// 获得发件人的描述信息
String personal = address[ 0 ].getPersonal();
if (personal == null ){
personal = "" ;
}
// 拼成发件人完整信息
String fromaddr = personal + " < " + from + " > " ;
return fromaddr;
}
/**
* 获取messages中message的数量
* @return
*/
private int getMessageCount() {
return this .messages.length;
}
/**
* 获得收件箱中新邮件的数量
* @return
* @throws MessagingException
*/
private int getNewMessageCount() throws MessagingException {
return this .folder.getNewMessageCount();
}
/**
* 获得收件箱中未读邮件的数量
* @return
* @throws MessagingException
*/
private int getUnreadMessageCount() throws MessagingException {
return this .folder.getUnreadMessageCount();
}
/**
* 获得邮件主题
*/
private String getSubject() throws MessagingException {
return getSubject( this .currentMessage);
}
private String getSubject(Message mimeMessage) throws MessagingException {
String subject = "" ;
try {
// 将邮件主题解码
subject = MimeUtility.decodeText(mimeMessage.getSubject());
if (subject == null ){
subject = "" ;
}
} catch (Exception exce) {
}
return subject;
}
/**
* 获得邮件发送日期
*/
private Date getSentDate() throws Exception {
return getSentDate( this .currentMessage);
}
private Date getSentDate(Message mimeMessage) throws Exception {
return mimeMessage.getSentDate();
}
/**
* 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"
*/
private boolean getReplySign() throws MessagingException {
return getReplySign( this .currentMessage);
}
private boolean getReplySign(Message mimeMessage) 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
*/
private String getMessageId() throws MessagingException {
return getMessageId( this .currentMessage);
}
private String getMessageId(Message mimeMessage) throws MessagingException {
return ((MimeMessage) 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
*/
private boolean isNew() throws MessagingException {
return isNew( this .currentMessage);
}
private boolean isNew(Message mimeMessage) throws MessagingException {
boolean isnew = false ;
Flags flags = 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
*/
private boolean isContainAttach() throws Exception {
return isContainAttach( this .currentMessage);
}
private boolean isContainAttach(Part part) throws Exception {
boolean attachflag = false ;
if (part.isMimeType( " multipart/* " )) {
// 如果邮件体包含多部分
Multipart mp = (Multipart) part.getContent();
// 遍历每部分
for ( int i = 0 ; i < mp.getCount(); i ++ ) {
// 获得每部分的主体
BodyPart bodyPart = mp.getBodyPart(i);
String disposition = bodyPart.getDisposition();
if ((disposition != null )
&& ((disposition.equals(Part.ATTACHMENT)) || (disposition
.equals(Part.INLINE)))){
attachflag = true ;
} else if (bodyPart.isMimeType( " multipart/* " )) {
attachflag = isContainAttach((Part) bodyPart);
} else {
String contype = bodyPart.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;
}
/**
* 获得当前邮件
*/
private void getMail() throws Exception {
try {
this .saveMessageAsFile(currentMessage);
this .parseMessage(currentMessage);
} catch (IOException e) {
throw new IOException( " 保存邮件出错,检查保存路径 " );
} catch (MessagingException e) {
throw new MessagingException( " 邮件转换出错 " );
} catch (Exception e) {
e.printStackTrace();
throw new Exception( " 未知错误 " );
}
}
/**
* 保存邮件源文件
*/
private void saveMessageAsFile(Message message) {
try {
// 将邮件的ID中尖括号中的部分做为邮件的文件名
String oriFileName = getInfoBetweenBrackets( this .getMessageId(message)
.toString());
// 设置文件后缀名。若是附件则设法取得其文件后缀名作为将要保存文件的后缀名,
// 若是正文部分则用.htm做后缀名
String emlName = oriFileName;
String fileNameWidthExtension = this .receiverInfo.getEmailDir()
+ oriFileName + this .receiverInfo.getEmailFileSuffix();
File storeFile = new File(fileNameWidthExtension);
for ( int i = 0 ; storeFile.exists(); i ++ ) {
emlName = oriFileName + i;
fileNameWidthExtension = this .receiverInfo.getEmailDir()
+ emlName + this .receiverInfo.getEmailFileSuffix();
storeFile = new File(fileNameWidthExtension);
}
this .currentEmailFileName = emlName;
System.out.println( " 邮件消息的存储路径: " + fileNameWidthExtension);
// 将邮件消息的内容写入ByteArrayOutputStream流中
ByteArrayOutputStream baos = new ByteArrayOutputStream();
message.writeTo(baos);
// 读取邮件消息流中的数据
StringReader in = new StringReader(baos.toString());
// 存储到文件
saveFile(fileNameWidthExtension, in);
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* 解析邮件
*/
private void parseMessage(Message message) throws IOException,
MessagingException {
Object content = message.getContent();
// 处理多部分邮件
if (content instanceof Multipart) {
handleMultipart((Multipart) content);
} else {
handlePart(message);
}
}
/*
* 解析Multipart
*/
private void handleMultipart(Multipart multipart) throws MessagingException,
IOException {
for ( int i = 0 , n = multipart.getCount(); i < n; i ++ ) {
handlePart(multipart.getBodyPart(i));
}
}
/*
* 解析指定part,从中提取文件
*/
private void handlePart(Part part) throws MessagingException, IOException {
String disposition = part.getDisposition();
String contentType = part.getContentType();
String fileNameWidthExtension = "" ;
// 获得邮件的内容输入流
InputStreamReader sbis = new InputStreamReader(part.getInputStream());
// 没有附件的情况
if (disposition == null ) {
if ((contentType.length() >= 10 )
&& (contentType.toLowerCase().substring( 0 , 10 )
.equals( " text/plain " ))) {
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .txt " ;
} else if ((contentType.length() >= 9 ) // Check if html
&& (contentType.toLowerCase().substring( 0 , 9 )
.equals( " text/html " ))) {
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .html " ;
} else if ((contentType.length() >= 9 ) // Check if html
&& (contentType.toLowerCase().substring( 0 , 9 )
.equals( " image/gif " ))) {
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .gif " ;
} else if ((contentType.length() >= 11 )
&& contentType.toLowerCase().substring( 0 , 11 ).equals(
" multipart/* " )) {
// System.out.println("multipart body: " + contentType);
handleMultipart((Multipart) part.getContent());
} else { // Unknown type
// System.out.println("Other body: " + contentType);
fileNameWidthExtension = this .receiverInfo.getAttachmentDir()
+ this .currentEmailFileName + " .txt " ;
}
// 存储内容文件
System.out.println( " 保存邮件内容到: " + fileNameWidthExtension);
saveFile(fileNameWidthExtension, sbis);
return ;
}
// 各种有附件的情况
String name = "" ;
if (disposition.equalsIgnoreCase(Part.ATTACHMENT)) {
name = getFileName(part);
// System.out.println("Attachment: " + name + " : "
// + contentType);
fileNameWidthExtension = this .receiverInfo.getAttachmentDir() + name;
} else if (disposition.equalsIgnoreCase(Part.INLINE)) {
name = getFileName(part);
// System.out.println("Inline: " + name + " : "
// + contentType);
fileNameWidthExtension = this .receiverInfo.getAttachmentDir() + name;
} else {
// System.out.println("Other: " + disposition);
}
// 存储各类附件
if ( ! fileNameWidthExtension.equals( "" )) {
System.out.println( " 保存邮件附件到: " + fileNameWidthExtension);
saveFile(fileNameWidthExtension, sbis);
}
}
private String getFileName(Part part) throws MessagingException,
UnsupportedEncodingException {
String fileName = part.getFileName();
fileName = MimeUtility.decodeText(fileName);
String name = fileName;
if (fileName != null ) {
int index = fileName.lastIndexOf( " / " );
if (index != - 1 ) {
name = fileName.substring(index + 1 );
}
}
return name;
}
/**
* 保存文件内容
* @param fileName 文件名
* @param input 输入流
* @throws IOException
*/
private void saveFile(String fileName, Reader input) throws IOException {
// 为了放置文件名重名,在重名的文件名后面天上数字
File file = new File(fileName);
// 先取得文件名的后缀
int lastDot = fileName.lastIndexOf( " . " );
String extension = fileName.substring(lastDot);
fileName = fileName.substring( 0 , lastDot);
for ( int i = 0 ; file.exists(); i ++ ) {
// 如果文件重名,则添加i
file = new File(fileName + i + extension);
}
// 从输入流中读取数据,写入文件输出流
FileWriter fos = new FileWriter(file);
BufferedWriter bos = new BufferedWriter(fos);
BufferedReader bis = new BufferedReader(input);
int aByte;
while ((aByte = bis.read()) != - 1 ) {
bos.write(aByte);
}
// 关闭流
bos.flush();
bos.close();
bis.close();
}
/**
* 获得尖括号之间的字符
* @param str
* @return
* @throws Exception
*/
private String getInfoBetweenBrackets(String str) throws Exception {
int i, j; // 用于标识字符串中的"<"和">"的位置
if (str == null ) {
str = " error " ;
return str;
}
i = str.lastIndexOf( " < " );
j = str.lastIndexOf( " > " );
if (i != - 1 && j != - 1 ){
str = str.substring(i + 1 , j);
}
return str;
}
public static void main(String[] args) throws Exception {
MailReceiverInfo receiverInfo = new MailReceiverInfo();
receiverInfo.setMailServerHost( " pop.163.com " );
receiverInfo.setMailServerPort( " 110 " );
receiverInfo.setValidate( true );
receiverInfo.setUserName( " *** " );
receiverInfo.setPassword( " *** " );
receiverInfo.setAttachmentDir( " C:/temp/mail/ " );
receiverInfo.setEmailDir( " C:/temp/mail/ " );
MailReceiver receiver = new MailReceiver(receiverInfo);
receiver.receiveAllMail();
}
}
</script>