解析邮件的工具类
/********************************************************************************
* Project Name [JavaEE_Components]
* File Name [MailUtils.java]
* Creation Date [2015-01-01]
*
* Copyright© [email protected] All Rights Reserved
*
* Work hard, play harder, think big and keep fit
********************************************************************************/
package javamail.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.Authenticator;
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.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
/**
* Email工具类
*
* @author 不落的太阳(Sean Yang aka ShortPeace)
* @version 1.0
* @since jdk 1.8
*
*/
public class MailUtils {
/**
* 根据指定的文件名生成附件
*
* @param fileName
* 文件名
* @return
* @throws Exception
*/
public static MimeBodyPart createMailAttachment(File fileName) throws Exception {
MimeBodyPart attachment = new MimeBodyPart();
DataSource dataSource = new FileDataSource(fileName);
DataHandler dataHandler = new DataHandler(dataSource);
attachment.setDataHandler(dataHandler);
attachment.setFileName(MimeUtility.encodeText(dataSource.getName()));
return attachment;
}
/**
* 根据指定路径的文件名生成附件
*
* @param filePath
* 附件所在的文件路径
* @return
* @throws Exception
*/
public static MimeBodyPart createMailAttachment(String filePath) throws Exception {
File file = new File(filePath);
return createMailAttachment(file);
}
/**
* 根据指定的邮件正文文本和文件[图片或其他]路径生成混合的邮件文本
*
* @param body
* 邮件正文内容
* @param filePath
* 图片或其他文件路径
* @return
* @throws Exception
*/
public static MimeBodyPart createMailBodyContent(String body, String filePath) throws Exception {
// 内容
MimeBodyPart mailBody = new MimeBodyPart();
// 邮件正文内容[html + image]
MimeMultipart mailBodyMP = new MimeMultipart("related");
MimeBodyPart otherPart = new MimeBodyPart();
MimeBodyPart htmlPart = new MimeBodyPart();
mailBodyMP.addBodyPart(otherPart);
mailBodyMP.addBodyPart(htmlPart);
// 其他内容
DataSource dataSource = new FileDataSource(new File(filePath));
DataHandler dataHandler = new DataHandler(dataSource);
otherPart.setDataHandler(dataHandler);
otherPart.setContentID(MimeUtility.encodeText(dataSource.getName()));
// 邮件内容
MimeMultipart htmlMP = new MimeMultipart("alternative");
MimeBodyPart htmlContent = new MimeBodyPart();
htmlContent.setContent(
"<span style='color: red'>带附件的Html邮件 <img src='cid:" + otherPart.getContentID() + "' /></span>",
"text/html;charset=UTF-8");
htmlMP.addBodyPart(htmlContent);
htmlPart.setContent(htmlMP);
mailBody.setContent(mailBodyMP);
return mailBody;
}
/**
* 根据指定的MimeBodyPart生成邮件
*
* @param bodyParts
* @return
* @throws Exception
*/
public static MimeMultipart createMixedBodyContent(MimeBodyPart... bodyParts) throws Exception {
MimeMultipart mailContent = new MimeMultipart("mixed");
for (MimeBodyPart mimeBodyPart : bodyParts) {
mailContent.addBodyPart(mimeBodyPart);
}
return mailContent;
}
/**
* 根据邮件内容生成eml文件
*
* @param message
* @return
* @throws Exception
*/
public static File createEmlFile(String dir, Message message) throws Exception {
File file = new File(dir + MimeUtility.decodeText(message.getSubject()) + ".eml");
message.writeTo(new FileOutputStream(file));
return file;
}
/**
* 发送已生成的eml文件
*
* @param emlFile
* @param properties
* @param auth
* @throws Exception
*/
public static void sendMailFromEmlFile(File emlFile, Properties properties, Authenticator auth) throws Exception {
Session session = Session.getInstance(properties, auth);
sendMailFromEmlFile(emlFile, session);
}
/**
* 发送已生成的eml文件
*
* @param emlFile
* @param session
* @throws Exception
*/
public static void sendMailFromEmlFile(File emlFile, Session session) throws Exception {
MimeMessage message = new MimeMessage(session, new FileInputStream(emlFile));
Transport.send(message);
}
/**
* 获取邮件的主题
*
* @param message
* @return
* @throws Exception
*/
public static String getMailSubject(Message message) throws Exception {
return MimeUtility.decodeText(message.getSubject());
}
/**
* 获取邮件的发件人
*
* @param message
* @return
* @throws Exception
*/
public static String getMailSender(Message message) throws Exception {
String emailSender = null;
Address[] addresses = message.getFrom();
if (addresses == null || addresses.length < 1) {
throw new IllegalArgumentException("该邮件没有发件人");
}
// 获得发件人
InternetAddress address = (InternetAddress) addresses[0];
String senderName = address.getPersonal();
if (senderName != null) {
senderName = MimeUtility.decodeText(senderName);
emailSender = senderName + "<" + address.getAddress() + ">";
} else {
senderName = address.getAddress();
}
return emailSender;
}
/**
* 根据收件人类型, 获得邮件的收件人
*
* @param message
* @param recipientType
* @return
* @throws Exception
*/
public static String getMailRecipients(Message message, Message.RecipientType recipientType) throws Exception {
StringBuilder builder = new StringBuilder();
Address[] addresses = null;
if (recipientType == null) {
addresses = message.getAllRecipients();
} else {
addresses = message.getRecipients(recipientType);
}
if (addresses == null || addresses.length < 1) {
throw new IllegalArgumentException("该邮件没有收件人");
}
for (Address address : addresses) {
InternetAddress iAddress = (InternetAddress) address;
builder.append(iAddress.toUnicodeString()).append(", ");
}
return builder.deleteCharAt(builder.length() - 1).toString();
}
/**
* 获得邮件发送时间
*
* @param message
* @return
* @throws Exception
*/
public static String getMailSendDate(Message message, String pattern) throws Exception {
String sendDateString = null;
if (pattern == null || "".equals(pattern.trim())) {
pattern = "yyyy年MM月dd日 E HH:mm";
}
Date sendDate = message.getSentDate();
sendDateString = new SimpleDateFormat(pattern).format(sendDate);
return sendDateString;
}
/**
* 邮件是否包含附件<br/>
*
* multipart/* 代表附件<br/>
* message/rfc822 代表了内嵌消息
*
* @param message
* @return
* @throws Exception
*/
public static boolean containsAttachment(Part part) throws Exception {
boolean flag = false;
if (part != null) {
if (part.isMimeType("multipart/*")) {
MimeMultipart mp = (MimeMultipart) part.getContent();
for (int i = 0; i < mp.getCount(); i++) {
BodyPart bodyPart = mp.getBodyPart(i);
String disposition = bodyPart.getDisposition();
if (disposition != null && (Part.ATTACHMENT.equalsIgnoreCase(disposition)
|| Part.INLINE.equalsIgnoreCase(disposition))) {
flag = true;
} else if (bodyPart.isMimeType("multipart/*")) {
flag = containsAttachment(bodyPart);
} else {
String contentType = bodyPart.getContentType();
if (contentType.indexOf("application") != -1) {
flag = true;
}
if (contentType.indexOf("name") != -1) {
flag = true;
}
}
if (flag)
break;
}
} else if (part.isMimeType("message/rfc822")) {
flag = containsAttachment((Part) part.getContent());
}
}
return flag;
}
/**
* 邮件是否已读
*
* @param message
* @return
* @throws Exception
*/
public static boolean isSeen(Message message) throws Exception {
if (message == null) {
throw new MessagingException("Message is empty");
}
return message.getFlags().contains(Flags.Flag.SEEN);
}
/**
* 邮件是否含有阅读回执
*
* @param message
* @return
* @throws Exception
*/
public static boolean isReplaySign(Message message) throws Exception {
if (message == null) {
throw new MessagingException("Message is empty");
}
boolean replaySign = false;
String[] headers = message.getHeader("Disposition-Notification-To");
if (headers != null && headers.length > 0) {
replaySign = true;
}
return replaySign;
}
/**
* 获得邮件的优先级
*
* @param message
* @return
* @throws Exception
*/
public static String getMailPriority(Message message) throws Exception {
if (message == null) {
throw new MessagingException("Message is empty");
}
String priority = "普通";
String[] headers = message.getHeader("X-Priority");
if (headers != null && headers.length > 0) {
String mailPriority = headers[0];
if (mailPriority.indexOf("1") != -1 || mailPriority.indexOf("High") != -1) {
priority = "紧急";
} else if (mailPriority.indexOf("5") != -1 || mailPriority.indexOf("Low") != -1) {
priority = "低";
} else {
priority = "普通"; // 3或者Normal;
}
}
return priority;
}
/**
* 获得邮件文本内容
*
* @param part
* @param content
* @throws Exception
*/
public static void getMailTextContent(Part part, StringBuilder content) throws Exception {
if (part == null) {
throw new MessagingException("Message content is empty");
}
boolean containsTextInAttachment = part.getContentType().indexOf("name") > 0;
if (part.isMimeType("text/*") && containsTextInAttachment) {
content.append(part.getContent().toString());
} else if (part.isMimeType("message/rfc822")) {
getMailTextContent((Part) part.getContent(), content);
} else if (part.isMimeType("multipart/*")) {
Multipart mp = (Multipart) part.getContent();
for (int i = 0; i < mp.getCount(); i++) {
BodyPart bodyPart = mp.getBodyPart(i);
getMailTextContent(bodyPart, content);
}
} else if (part.isMimeType("image/*")) {
// TODO part.getInputStream()获得输入流然后输出到指定的目录
} else {
// TODO 其它类型的contentType, 未做处理, 直接输出
content.append(part.getContent().toString());
}
}
/**
* 保存附件
*
* @param part
* @param destDir
* @throws Exception
*/
public static void saveAttachment(Part part, String destDir) throws Exception {
if (part == null) {
throw new MessagingException("part is empty");
}
// 复杂的邮件包含多个邮件体
if (part.isMimeType("multipart/*")) {
Multipart mp = (Multipart) part.getContent();
// 遍历每一个邮件体
for (int i = 0; i < mp.getCount(); i++) {
BodyPart bodyPart = mp.getBodyPart(i);
// bodyPart也可能有多个邮件体组成
String disposition = bodyPart.getDisposition();
if (disposition == null && (Part.ATTACHMENT.equalsIgnoreCase(disposition)
|| Part.INLINE.equalsIgnoreCase(disposition))) {
InputStream in = bodyPart.getInputStream();
saveFile(in, destDir, decodeText(bodyPart.getFileName()));
} else if (bodyPart.isMimeType("multipart/*")) {
saveAttachment(bodyPart, destDir);
} else {
String contentType = bodyPart.getContentType();
if (contentType.indexOf("name") != -1 || contentType.indexOf("application") != -1) {
saveFile(bodyPart.getInputStream(), destDir, decodeText(bodyPart.getFileName()));
}
}
}
} else if (part.isMimeType("message/rfc822")) {
saveAttachment((Part) part.getContent(), destDir);
}
}
/**
* 保存文件到指定目录
*
* @param in
* @param destDir
* @param fileName
* @throws Exception
*/
public static void saveFile(InputStream in, String destDir, String fileName) throws Exception {
FileOutputStream out = new FileOutputStream(new File(destDir + fileName));
byte[] buffer = new byte[1024];
int length = 0;
while ((length = in.read(buffer)) != -1) {
out.write(buffer, 0, length);
}
out.close();
in.close();
}
/**
* 解码文本
*
* @param encodedText
* @return
* @throws Exception
*/
public static String decodeText(String encodedText) throws Exception {
if (encodedText == null || "".equals(encodedText.trim())) {
return "";
} else {
return MimeUtility.decodeText(encodedText);
}
}
}
解析邮件的测试类
/********************************************************************************
* Project Name [JavaEE_Components]
* File Name [ParsingMails.java]
* Creation Date [2015-01-01]
*
* Copyright© [email protected] All Rights Reserved
*
* Work hard, play harder, think big and keep fit
********************************************************************************/
package javamail.mail;
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
import org.junit.Before;
import org.junit.Test;
import javamail.utils.MailAuthenticator;
import javamail.utils.MailConstants;
import javamail.utils.MailUtils;
import javamail.utils.PasswordUtils;
/**
* 解析邮件
*
* @author 不落的太阳(Sean Yang aka ShortPeace)
* @version 1.0
* @since jdk 1.8
*
*/
public class ParsingMails {
private static Properties properties = null;
private static String emailAddress = "[email protected]";
@Before
public void init() {
properties = new Properties();
properties.put("mail.store.protocol", MailConstants.PROTOCAL_POP3);
properties.put("mail.pop3.host", MailConstants.POP3_HOST_OF_SINA);
properties.put("mail.pop3.port", MailConstants.POP3_PORT_OF_SINA);
properties.put("mail.pop3.auth", MailConstants.IS_AUTHORIZATION_NEED);
properties.put("mail.debug", String.valueOf(MailConstants.IS_DEBUG_MOD_ENABLED));
}
/**
* 解析邮件
*
* @throws Exception
*/
public static void parseMails() throws Exception {
// 创建Session对象并连接到指定的邮箱
Session session = Session.getInstance(properties,
new MailAuthenticator(emailAddress, PasswordUtils.readPassword(emailAddress)));
Store store = session.getStore();
store.connect(emailAddress, PasswordUtils.readPassword(emailAddress));
// 获得收件箱
Folder folder = store.getFolder("INBOX");
// 以只读权限打开收件箱, 还可以配置为Folder.READ_WRITE
folder.open(Folder.READ_ONLY);
// 得到收件箱里所有的邮件
Message[] messages = folder.getMessages();
// 解析邮件
for (Message message : messages) {
System.out.println("第" + message.getMessageNumber() + "封邮件 ");
System.out.println("邮件主题: " + MailUtils.getMailSubject(message));
System.out.println("邮件发件人: " + MailUtils.getMailSender(message));
System.out.println("邮件收件人: " + MailUtils.getMailRecipients(message, null));
System.out.println("邮件发送时间: " + MailUtils.getMailSendDate(message, null));
System.out.println("邮件是否已读: " + MailUtils.isSeen(message));
System.out.println("邮件的优先级: " + MailUtils.getMailPriority(message));
System.out.println("是否需要回执: " + MailUtils.isReplaySign(message));
System.out.println("邮件的大小: " + message.getSize() * 1024 + "KB");
boolean containerAttachment = MailUtils.containsAttachment(message);
System.out.println("是否包含附件: " + containerAttachment);
if (containerAttachment) {
MailUtils.saveAttachment(message, "Z:/temp/" + message.getSubject() + "_");
}
StringBuilder content = new StringBuilder(30);
MailUtils.getMailTextContent(message, content);
System.out.println("邮件正文: " + (content.length() > 100 ? content.subSequence(0, 100) + "......" : content));
System.out.println();
}
folder.close(true);
store.close();
}
@Test
public void testParseMails() throws Exception {
parseMails();
}
}
