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*************************************");
}
}
}
