java 实现邮件收发
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依赖
<!--发送邮件API-->
<!-- https://mvnrepository.com/artifact/javax.mail/javax.mail-api -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.6.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.sun.mail/javax.mail -->
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.2</version>
</dependency>EmailException.java
public class EmailException extends Exception {
public EmailException(String message) {
super(message);
}
public EmailException() {
super();
}
private static final long serialVersionUID = 115631651651651651L;
}SendMailUtil.java
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.util.Date;
import java.util.Properties;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
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;
import com.sun.mail.util.MailSSLSocketFactory;
public class SendMailUtil {
// smtp服务器
private String HOST = "";
// 用户名
private String USER = "";
// 授权码
private String PWD = "";
// 发件人地址
private String FROM = "";
// 收件人地址
private String[] TOS = null;
// 附件地址
private String[] AFFIX = null;
private Properties props = null;
/**
* @param USER 账户名
* @param PWD 密码
* @param FROM 发件人地址
*/
public SendMailUtil(String USER, String PWD, String FROM) throws EmailException, GeneralSecurityException {
this.USER = USER;
this.PWD = PWD;
this.FROM = FROM;
initProperties();
}
private void initProperties() throws EmailException, GeneralSecurityException {
props = new Properties();
if (FROM == null || FROM.length() == 0) {
throw new EmailException("邮箱账号不能为空");
} else {
if (FROM.contains("@qq")) {
HOST = "smtp.qq.com";
} else if (FROM.contains("@163")) {
HOST = "smtp.163.com";
} else if (FROM.contains("@sina")) {
HOST = "smtp.sina.com.cn";
} else if (FROM.contains("@jbritian")) {
HOST = "mail.jbritian.com";
} else {
throw new EmailException("不支持该协议");
}
// 设置邮件服务器主机名
props.setProperty("mail.host", HOST);
}
if (PWD == null || PWD.length() == 0) throw new EmailException("邮箱密码不能为空");
// 发送邮件协议名称
props.setProperty("mail.transport.protocol", "smtp");
// 需要经过授权，也就是有户名和密码的校验，这样才能通过验证（一定要有这一条）
props.setProperty("mail.smtp.auth", "true");
// 设置debug模式 后台输出邮件发送的过程
// props.put("mail.debug", "true");
//ssl加密
MailSSLSocketFactory sf = new MailSSLSocketFactory();
sf.setTrustAllHosts(true);
props.put("mail.smtp.ssl.enable", "true");
props.put("mail.smtp.ssl.socketFactory", sf);
}
/**
* 添加附件
*
* @param path 需要添加附件的文件路径
*/
public void addFile(String... path) throws EmailException {
if (path == null || path.length == 0) throw new EmailException("附件路径不能为空");
this.AFFIX = path;
}
/**
* 设置收件人
*
* @param to address1,address2...
*/
public void setTo(String... to) throws EmailException {
if (toString().length() > 0) {
for (String t : to) {
boolean emailFormat = emailFormat(t);
if (!emailFormat) {
throw new EmailException(t + "邮箱格式不正确");
}
}
TOS = to;
} else {
throw new EmailException("收件人不能为空");
}
}
/**
* * 验证输入的邮箱格式是否符合
*
* @return 是否合法
*/
private boolean emailFormat(String email) {
boolean tag = true;
final String pattern1 = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
final Pattern pattern = Pattern.compile(pattern1);
final Matcher mat = pattern.matcher(email);
if (!mat.find()) {
tag = false;
}
return tag;
}
/**
* 发送邮件
*
* @param subject 标题
* @param context 文本信息
*/
public void send(String subject, String context) throws EmailException, MessagingException, GeneralSecurityException, UnsupportedEncodingException {
if (subject == null || subject.length() == 0) subject = UUID.randomUUID().toString();
if (TOS.length == 0) throw new EmailException("收件人不能为空");
// 用props对象构建一个session
Session session = Session.getInstance(props);
// session.setDebug(true);//关闭控制台输出
//用session为参数定义消息对象
MimeMessage message = new MimeMessage(session);
// 加载发件人地址
message.setFrom(new InternetAddress(FROM, USER));
// 加载收件人地址
InternetAddress[] sendTo = new InternetAddress[TOS.length];
for (int i = 0; i < TOS.length; i++) {
sendTo[i] = new InternetAddress(TOS[i]);
}
message.addRecipients(Message.RecipientType.TO, sendTo);
//设置在发送给收信人之前给自己（发送方）抄送一份，不然会被当成垃圾邮件，报554错
message.addRecipients(MimeMessage.RecipientType.CC, InternetAddress.parse(FROM));
//加载标题
message.setSubject(subject);
//向 multipart 对象中添加邮件的各个部分内容，包括文本内容和附件
Multipart multipart = new MimeMultipart();
//设置邮件的文本内容
BodyPart contentPart = new MimeBodyPart();
contentPart.setText(context);
multipart.addBodyPart(contentPart);
if (AFFIX != null && AFFIX.length > 0) {//添加附件
for (String affix : AFFIX) {
File file = new File(affix);
if (file.exists()) {
BodyPart messageBodyPart = new MimeBodyPart();
FileDataSource source = new FileDataSource(file);
//添加附件的内容
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(MimeUtility.encodeWord(file.getName(), "GBK", null));
multipart.addBodyPart(messageBodyPart);
} else {
throw new EmailException("文件" + affix + "不存在");
}
}
}
//将multipart对象放到message中
message.setContent(multipart);
//保存邮件
message.saveChanges();
//发送邮件
Transport transport = session.getTransport();
//连接服务器的邮箱
transport.connect(HOST, FROM, PWD);
//把邮件发送出去
transport.sendMessage(message, message.getAllRecipients());
//关闭连接
transport.close();
}
/**
* 转发邮件
*
* @param message 接收的邮件
*/
public void forwardMail(Message message) throws MessagingException, EmailException, IOException {
if (TOS.length == 0) throw new EmailException("收件人不能为空");
//用props对象构建一个session
Session session = Session.getInstance(props);
// 关闭控制台输出
// session.setDebug(true);
//用session为参数定义消息对象
MimeMessage newMessage = new MimeMessage(session);
newMessage.setSubject(message.getSubject());
newMessage.setFrom(new InternetAddress(FROM, USER));
newMessage.setSentDate(new Date());
newMessage.setContent(message.getContent(), message.getContentType());
// 加载收件人地址
InternetAddress[] sendTo = new InternetAddress[TOS.length];
for (int i = 0; i < TOS.length; i++) {
sendTo[i] = new InternetAddress(TOS[i]);
}
newMessage.addRecipients(Message.RecipientType.TO, sendTo);
//设置在发送给收信人之前给自己（发送方）抄送一份，不然会被当成垃圾邮件，报554错
newMessage.addRecipients(MimeMessage.RecipientType.CC, InternetAddress.parse(FROM));
Transport smtp = session.getTransport("smtp");
smtp.connect(HOST, FROM, PWD);
smtp.sendMessage(newMessage, newMessage.getAllRecipients());
smtp.close();
}
}IMAPReceiveMail.java
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
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.MimeMultipart;
import javax.mail.internet.MimeUtility;
import com.sun.mail.util.MailSSLSocketFactory;
public class IMAPReceiveMail {
private String user = "";//账号
private String password = "";//密码
private String HOST = ""; // smtp服务器
// private Properties props = null;
private Folder folder = null;//收件箱
private Store store = null;//实例对象
// final String pop3 = "IMAP";
final String imap = "imap";
public IMAPReceiveMail(String user, String password) {
this.password = password;//密码
this.user = user;//账户
}
/**
* @param message 邮件对象
* @param to 收件人
* @throws MessagingException
* @throws IOException
*/
// public void forwardMail(Message message,String to) throws MessagingException, IOException {
// Message forward = new MimeMessage(session);
// forward.setSubject(message.getSubject());
// forward.setFrom(new InternetAddress(to));
// forward.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
// forward.setSentDate(new Date());
// forward.setContent(message.getContent(), message.getContentType());
//
// Transport smtp = session.getTransport("smtp");
// smtp.connect(HOST, user, password);//连接服务器的邮箱
// smtp.sendMessage(forward, forward.getAllRecipients());
// smtp.close();
// }
/**
* 接收邮件
*/
public Folder resceive() throws Exception {
/**
* 因为现在使用的是163邮箱 而163的 pop地址是 pop3.163.com 端口是 110 比如使用好未来企业邮箱 就需要换成 好未来邮箱的
* pop服务器地址 pop.263.net 和 端口 110
*/
String duankou = ""; // 端口号
String servicePath = ""; // 服务器地址
if (user == null || user.length() == 0) throw new EmailException("账户不能为空！！！！");
if (password == null || password.length() == 0) throw new EmailException("密码不能为空！！！！");
if (user.contains("@163")) {
duankou = "143"; // 端口号
servicePath = "imap.163.com"; // 服务器地址
} else if (user.contains("@qq")) {
duankou = "993"; // 端口号
servicePath = "imap.qq.com"; // 服务器地址
} else {
throw new EmailException("不支持该协议");
}
// 准备连接服务器的会话信息
Properties props = new Properties();
props.setProperty("mail.store.protocol", imap); // 使用pop3协议
props.setProperty("mail.imap.socketFactory.fallback", "false");
props.setProperty("mail.imap.port", duankou); // 端口
props.setProperty("mail.imap.socketFactory.port", duankou); // 端口
props.setProperty("mail.transport.protocol", "smtp");// 发送邮件协议名称
props.setProperty("mail.smtp.auth", "true"); //需要经过授权，也就是有户名和密码的校验，这样才能通过验证（一定要有这一条
props.setProperty("mail.host", HOST);
//关闭读取附件时分批获取 BASE64 输入流的配置
props.setProperty("mail.imap.partialfetch", "false");
props.setProperty("mail.imaps.partialfetch", "false");
// props.setProperty("mail.pop3.host", servicePath); // pop3服务器
// final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
// Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
// props.setProperty("mail.imap.socketFactory.class", SSL_FACTORY);
MailSSLSocketFactory sf = new MailSSLSocketFactory();//ssl加密
sf.setTrustAllHosts(true);
props.put("mail.imap.ssl.enable", "true");
props.put("mail.imap.ssl.socketFactory", sf);
// 创建Session实例对象
Session session = Session.getInstance(props);
session.setDebug(false);
store = session.getStore(imap);
store.connect(servicePath, user, password); // 163邮箱程序登录属于第三方登录所以这里的密码是163给的授权密码而并非普通的登录密码
// 获得收件箱
folder = store.getFolder("INBOX");
/*
* Folder.READ_ONLY：只读权限 Folder.READ_WRITE：可读可写（可以修改邮件的状态）
*/
folder.open(Folder.READ_WRITE); // 打开收件箱
// 由于POP3协议无法获知邮件的状态,所以getUnreadMessageCount得到的是收件箱的邮件总数
// System.out.println("未读邮件数: " + folder.getUnreadMessageCount());
// 由于POP3协议无法获知邮件的状态,所以下面得到的结果始终都是为0
// System.out.println("删除邮件数: " + folder.getDeletedMessageCount());
// System.out.println("新邮件: " + folder.getNewMessageCount());
// 获得收件箱中的邮件总数
// System.out.println("邮件总数: " + folder.getMessageCount());
// 得到收件箱中的所有邮件,并解析
// Message[] messages = folder.getMessages();
// parseMessage(messages);
// 得到收件箱中的所有邮件并且删除邮件
// deleteMessage(messages);
// 释放资源
// folder.close(true);
// store.close();
return folder;
}
public void Colsefolder() throws MessagingException {//关闭资源
if (folder != null) {
folder.close();
}
if (store != null) {
store.close();
}
}
/**
* 解析邮件
*
* @param messages 要解析的邮件列表
*/
public void parseMessage(Message... messages) throws MessagingException, IOException {
if (messages == null || messages.length < 1)
throw new MessagingException("未找到要解析的邮件!");
// 解析所有邮件
for (int i = 0, count = messages.length; i < count; i++) {
MimeMessage msg = (MimeMessage) messages[i];
System.out.println("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
System.out.println("主题: " + getSubject(msg));
System.out.println("发件人: " + getFrom(msg));
System.out.println("收件人：" + getReceiveAddress(msg, null));
System.out.println("发送时间：" + getSentDate(msg, null));
System.out.println("是否已读：" + isSeen(msg));
System.out.println("邮件优先级：" + getPriority(msg));
System.out.println("是否需要回执：" + isReplySign(msg));
System.out.println("邮件大小：" + msg.getSize() * 1024 + "kb");
boolean isContainerAttachment = isContainAttachment(msg);
System.out.println("是否包含附件：" + isContainerAttachment);
if (isContainerAttachment) {
saveAttachment(msg, "f:\\mailTest\\" + msg.getSubject() + "_" + i + "_"); // 保存附件
}
StringBuffer content = new StringBuffer(30);
getMailTextContent(msg, content);
System.out.println("邮件正文：" + (content.length() > 100 ? content.substring(0, 100) + "..." : content));
System.out.println("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
System.out.println();
}
}
/**
* 解析邮件
*
* @param messages 要解析的邮件列表
*/
public void deleteMessage(Message... messages) throws MessagingException, IOException {
if (messages == null || messages.length < 1)
throw new MessagingException("未找到要解析的邮件!");
// 解析所有邮件
for (int i = 0, count = messages.length; i < count; i++) {
/**
* 邮件删除
*/
Message message = messages[i];
String subject = message.getSubject();
// set the DELETE flag to true
message.setFlag(Flags.Flag.DELETED, true);
System.out.println("Marked DELETE for message: " + subject);
}
}
/**
* 获得邮件主题
*
* @param msg 邮件内容
* @return 解码后的邮件主题
*/
public String getSubject(MimeMessage msg) throws UnsupportedEncodingException, MessagingException {
return MimeUtility.decodeText(msg.getSubject());
}
/**
* 获得邮件发件人
*
* @param msg 邮件内容
* @return 姓名 <Email地址>
* @throws MessagingException
* @throws UnsupportedEncodingException
*/
public String getFrom(MimeMessage msg) throws MessagingException, UnsupportedEncodingException {
String from = "";
Address[] froms = msg.getFrom();
if (froms.length < 1)
throw new MessagingException("没有发件人!");
InternetAddress address = (InternetAddress) froms[0];
String person = address.getPersonal();
if (person != null) {
person = MimeUtility.decodeText(person) + " ";
} else {
person = "";
}
from = person + "<" + address.getAddress() + ">";
return from;
}
public String getFromAddress(MimeMessage msg) throws MessagingException, UnsupportedEncodingException {
String from = "";
Address[] froms = msg.getFrom();
if (froms.length < 1)
throw new MessagingException("没有发件人!");
InternetAddress address = (InternetAddress) froms[0];
from = address.getAddress();
return from;
}
/**
* 根据收件人类型，获取邮件收件人、抄送和密送地址。如果收件人类型为空，则获得所有的收件人
* <p>
* Message.RecipientType.TO 收件人
* </p>
* <p>
* Message.RecipientType.CC 抄送
* </p>
* <p>
* Message.RecipientType.BCC 密送
* </p>
*
* @param msg 邮件内容
* @param type 收件人类型
* @return 收件人1 <邮件地址1>, 收件人2 <邮件地址2>, ...
* @throws MessagingException
*/
public String getReceiveAddress(MimeMessage msg, Message.RecipientType type) throws MessagingException {
StringBuffer receiveAddress = new StringBuffer();
Address[] addresss = null;
if (type == null) {
addresss = msg.getAllRecipients();
} else {
addresss = msg.getRecipients(type);
}
if (addresss == null || addresss.length < 1)
throw new MessagingException("没有收件人!");
for (Address address : addresss) {
InternetAddress internetAddress = (InternetAddress) address;
receiveAddress.append(internetAddress.toUnicodeString()).append(",");
}
receiveAddress.deleteCharAt(receiveAddress.length() - 1); // 删除最后一个逗号
return receiveAddress.toString();
}
/**
* 获得邮件发送时间
*
* @param msg 邮件内容
* @return yyyy年mm月dd日 星期X HH:mm
* @throws MessagingException
*/
public String getSentDate(MimeMessage msg, String pattern) throws MessagingException {
Date receivedDate = msg.getSentDate();
if (receivedDate == null)
return "";
if (pattern == null || "".equals(pattern))
pattern = "yyyy年MM月dd日 E HH:mm ";
return new SimpleDateFormat(pattern).format(receivedDate);
}
/**
* 判断邮件中是否包含附件
*
* @return 邮件中存在附件返回true，不存在返回false
* @throws MessagingException
* @throws IOException
*/
public boolean isContainAttachment(Part part) throws MessagingException, IOException {
boolean flag = false;
if (part.isMimeType("multipart/*")) {
MimeMultipart multipart = (MimeMultipart) part.getContent();
int partCount = multipart.getCount();
for (int i = 0; i < partCount; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
String disp = bodyPart.getDisposition();
if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
flag = true;
} else if (bodyPart.isMimeType("multipart/*")) {
flag = isContainAttachment(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 = isContainAttachment((Part) part.getContent());
}
return flag;
}
/**
* 判断邮件是否已读
*
* @param msg 邮件内容
* @return 如果邮件已读返回true, 否则返回false
* @throws MessagingException
*/
public boolean isSeen(MimeMessage msg) throws MessagingException {
return msg.getFlags().contains(Flags.Flag.SEEN);
}
/**
* 判断邮件是否需要阅读回执
*
* @param msg 邮件内容
* @return 需要回执返回true, 否则返回false
* @throws MessagingException
*/
public boolean isReplySign(MimeMessage msg) throws MessagingException {
boolean replySign = false;
String[] headers = msg.getHeader("Disposition-Notification-To");
if (headers != null)
replySign = true;
return replySign;
}
/**
* 获得邮件的优先级
*
* @param msg 邮件内容
* @return 1(High):紧急 3:普通(Normal) 5:低(Low)
* @throws MessagingException
*/
public String getPriority(MimeMessage msg) throws MessagingException {
String priority = "普通";
String[] headers = msg.getHeader("X-Priority");
if (headers != null) {
String headerPriority = headers[0];
if (headerPriority.indexOf("1") != -1 || headerPriority.indexOf("High") != -1)
priority = "紧急";
else if (headerPriority.indexOf("5") != -1 || headerPriority.indexOf("Low") != -1)
priority = "低";
else
priority = "普通";
}
return priority;
}
/**
* 获得邮件文本内容
*
* @param part 邮件体
* @param content 存储邮件文本内容的字符串
* @throws MessagingException
* @throws IOException
*/
public void getMailTextContent(Part part, StringBuffer content) throws MessagingException, IOException {
// 如果是文本类型的附件，通过getContent方法可以取到文本内容，但这不是我们需要的结果，所以在这里要做判断
boolean isContainTextAttach = part.getContentType().indexOf("name") > 0;
if (part.isMimeType("text/*") && !isContainTextAttach) {
content.append(part.getContent().toString());
} else if (part.isMimeType("message/rfc822")) {
getMailTextContent((Part) part.getContent(), content);
} else if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent();
int partCount = multipart.getCount();
for (int i = 0; i < partCount; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
getMailTextContent(bodyPart, content);
}
}
}
/**
* 保存附件
*
* @param part 邮件中多个组合体中的其中一个组合体
* @param destDir 附件保存目录
* @throws UnsupportedEncodingException
* @throws MessagingException
* @throws FileNotFoundException
* @throws IOException
*/
public void saveAttachment(Part part, String destDir)
throws UnsupportedEncodingException, MessagingException, FileNotFoundException, IOException {
if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent(); // 复杂体邮件
// 复杂体邮件包含多个邮件体
int partCount = multipart.getCount();
for (int i = 0; i < partCount; i++) {
// 获得复杂体邮件中其中一个邮件体
BodyPart bodyPart = multipart.getBodyPart(i);
// 某一个邮件体也有可能是由多个邮件体组成的复杂体
String disp = bodyPart.getDisposition();
if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
InputStream is = bodyPart.getInputStream();
saveFile(is, 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);
}
}
/**
* 读取输入流中的数据保存至指定目录
*
* @param is 输入流
* @param fileName 文件名
* @param destDir 文件存储目录
* @throws FileNotFoundException
* @throws IOException
*/
private void saveFile(InputStream is, String destDir, String fileName)
throws FileNotFoundException, IOException {
BufferedInputStream bis = new BufferedInputStream(is);
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(destDir + fileName)));
int len = -1;
while ((len = bis.read()) != -1) {
bos.write(len);
bos.flush();
}
bos.close();
bis.close();
}
public void SetSEEN(MimeMessage message) throws MessagingException {//设置文件已读
message.setFlag(Flags.Flag.SEEN, true);
}
/**
* 文本解码
*
* @param encodeText 解码MimeUtility.encodeText(String text)方法编码后的文本
* @return 解码后的文本
* @throws UnsupportedEncodingException
*/
public String decodeText(String encodeText) throws UnsupportedEncodingException {
if (encodeText == null || "".equals(encodeText)) {
return "";
} else {
return MimeUtility.decodeText(encodeText);
}
}
}POP3ReceiveMail.java
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
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.MimeMultipart;
import javax.mail.internet.MimeUtility;
import com.sun.mail.util.MailSSLSocketFactory;
/**
* 使用POP3协议接收邮件
*/
public class POP3ReceiveMail {
private String user = "";//账号
private String password = "";//密码
// private Properties props = null;
private Folder folder = null;//收件箱
private Store store = null;//实例对象
final String pop3 = "pop3";
// final String imap = "imap";
public POP3ReceiveMail(String user, String password) {
this.password = password;//密码
this.user = user;//账户
}
/**
* 接收邮件
*/
public Folder resceive() throws Exception {
/**
* 因为现在使用的是163邮箱 而163的 pop地址是 pop3.163.com 端口是 110 比如使用好未来企业邮箱 就需要换成 好未来邮箱的
* pop服务器地址 pop.263.net 和 端口 110
*/
String duankou = ""; // 端口号
String servicePath = ""; // 服务器地址
if (user == null || user.length() == 0) throw new EmailException("账户不能为空！！！！");
if (password == null || password.length() == 0) throw new EmailException("密码不能为空！！！！");
if (user.contains("@163")) {
duankou = "110"; // 端口号
servicePath = "pop3.163.com"; // 服务器地址
} else if (user.contains("@qq")) {
duankou = "995"; // 端口号
servicePath = "pop.qq.com"; // 服务器地址
} else {
throw new EmailException("不支持该协议");
}
// 准备连接服务器的会话信息
Properties props = new Properties();
props.setProperty("mail.store.protocol", pop3); // 使用pop3协议
// props.setProperty("mail.transport.protocol", pop3); // 使用pop3协议
props.setProperty("mail.pop3.port", duankou); // 端口
props.setProperty("mail.pop3.host", servicePath); // pop3服务器
props.setProperty("mail.pop3.socketFactory.fallback", "true");
MailSSLSocketFactory sf = new MailSSLSocketFactory();//ssl加密
sf.setTrustAllHosts(true);
props.put("mail.pop3.ssl.enable", "true");
props.put("mail.pop3.ssl.socketFactory", sf);
// final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
// Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
// props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);
// 创建Session实例对象
Session session = Session.getInstance(props);
store = session.getStore(pop3);
store.connect(servicePath, user, password); // 163邮箱程序登录属于第三方登录所以这里的密码是163给的授权密码而并非普通的登录密码
// 获得收件箱
folder = store.getFolder("INBOX");
/*
* Folder.READ_ONLY：只读权限 Folder.READ_WRITE：可读可写（可以修改邮件的状态）
*/
// folder.open(Folder.READ_WRITE); // 打开收件箱
folder.open(Folder.READ_WRITE); // 打开收件箱
// 由于POP3协议无法获知邮件的状态,所以getUnreadMessageCount得到的是收件箱的邮件总数
// System.out.println("未读邮件数: " + folder.getUnreadMessageCount());
// 由于POP3协议无法获知邮件的状态,所以下面得到的结果始终都是为0
// System.out.println("删除邮件数: " + folder.getDeletedMessageCount());
// System.out.println("新邮件: " + folder.getNewMessageCount());
// 获得收件箱中的邮件总数
// System.out.println("邮件总数: " + folder.getMessageCount());
// 得到收件箱中的所有邮件,并解析
// Message[] messages = folder.getMessages();
// parseMessage(messages);
// 得到收件箱中的所有邮件并且删除邮件
// deleteMessage(messages);
// 释放资源
// folder.close(true);
// store.close();
return folder;
}
public void Colsefolder() throws MessagingException {//关闭资源
if (folder != null) {
folder.close();
}
if (store != null) {
store.close();
}
}
/**
* 解析邮件
*
* @param messages 要解析的邮件列表
*/
public void parseMessage(Message... messages) throws MessagingException, IOException {
if (messages == null || messages.length < 1)
throw new MessagingException("未找到要解析的邮件!");
// 解析所有邮件
for (int i = 0, count = messages.length; i < count; i++) {
MimeMessage msg = (MimeMessage) messages[i];
System.out.println("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
System.out.println("主题: " + getSubject(msg));
System.out.println("发件人: " + getFrom(msg));
System.out.println("收件人：" + getReceiveAddress(msg, null));
System.out.println("发送时间：" + getSentDate(msg, null));
System.out.println("是否已读：" + isSeen(msg));
System.out.println("邮件优先级：" + getPriority(msg));
System.out.println("是否需要回执：" + isReplySign(msg));
System.out.println("邮件大小：" + msg.getSize() * 1024 + "kb");
boolean isContainerAttachment = isContainAttachment(msg);
System.out.println("是否包含附件：" + isContainerAttachment);
if (isContainerAttachment) {
saveAttachment(msg, "f:\\mailTest\\" + msg.getSubject() + "_" + i + "_"); // 保存附件
}
StringBuffer content = new StringBuffer(30);
getMailTextContent(msg, content);
System.out.println("邮件正文：" + (content.length() > 100 ? content.substring(0, 100) + "..." : content));
System.out.println("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
System.out.println();
}
}
/**
* 解析邮件
*
* @param messages 要解析的邮件列表
*/
public void deleteMessage(Message... messages) throws MessagingException, IOException {
if (messages == null || messages.length < 1)
throw new MessagingException("未找到要解析的邮件!");
// 解析所有邮件
for (int i = 0, count = messages.length; i < count; i++) {
/**
* 邮件删除
*/
Message message = messages[i];
String subject = message.getSubject();
// set the DELETE flag to true
message.setFlag(Flags.Flag.DELETED, true);
System.out.println("Marked DELETE for message: " + subject);
}
}
/**
* 获得邮件主题
*
* @param msg 邮件内容
* @return 解码后的邮件主题
*/
public String getSubject(MimeMessage msg) throws UnsupportedEncodingException, MessagingException {
return MimeUtility.decodeText(msg.getSubject());
}
/**
* 获得邮件发件人
*
* @param msg 邮件内容
* @return 姓名 <Email地址>
* @throws MessagingException
* @throws UnsupportedEncodingException
*/
public String getFrom(MimeMessage msg) throws MessagingException, UnsupportedEncodingException {
String from = "";
Address[] froms = msg.getFrom();
if (froms.length < 1)
throw new MessagingException("没有发件人!");
InternetAddress address = (InternetAddress) froms[0];
String person = address.getPersonal();
if (person != null) {
person = MimeUtility.decodeText(person) + " ";
} else {
person = "";
}
from = person + "<" + address.getAddress() + ">";
return from;
}
public String getFromAddress(MimeMessage msg) throws MessagingException, UnsupportedEncodingException {
String from = "";
Address[] froms = msg.getFrom();
if (froms.length < 1)
throw new MessagingException("没有发件人!");
InternetAddress address = (InternetAddress) froms[0];
from = address.getAddress();
return from;
}
/**
* 根据收件人类型，获取邮件收件人、抄送和密送地址。如果收件人类型为空，则获得所有的收件人
* <p>
* Message.RecipientType.TO 收件人
* </p>
* <p>
* Message.RecipientType.CC 抄送
* </p>
* <p>
* Message.RecipientType.BCC 密送
* </p>
*
* @param msg 邮件内容
* @param type 收件人类型
* @return 收件人1 <邮件地址1>, 收件人2 <邮件地址2>, ...
* @throws MessagingException
*/
public String getReceiveAddress(MimeMessage msg, Message.RecipientType type) throws MessagingException {
StringBuffer receiveAddress = new StringBuffer();
Address[] addresss = null;
if (type == null) {
addresss = msg.getAllRecipients();
} else {
addresss = msg.getRecipients(type);
}
if (addresss == null || addresss.length < 1)
throw new MessagingException("没有收件人!");
for (Address address : addresss) {
InternetAddress internetAddress = (InternetAddress) address;
receiveAddress.append(internetAddress.toUnicodeString()).append(",");
}
receiveAddress.deleteCharAt(receiveAddress.length() - 1); // 删除最后一个逗号
return receiveAddress.toString();
}
/**
* 获得邮件发送时间
*
* @param msg 邮件内容
* @return yyyy年mm月dd日 星期X HH:mm
* @throws MessagingException
*/
public String getSentDate(MimeMessage msg, String pattern) throws MessagingException {
Date receivedDate = msg.getSentDate();
if (receivedDate == null)
return "";
if (pattern == null || "".equals(pattern))
pattern = "yyyy年MM月dd日 E HH:mm ";
return new SimpleDateFormat(pattern).format(receivedDate);
}
/**
* 判断邮件中是否包含附件
*
* @param msg 邮件内容
* @return 邮件中存在附件返回true，不存在返回false
* @throws MessagingException
* @throws IOException
*/
public boolean isContainAttachment(Part part) throws MessagingException, IOException {
boolean flag = false;
if (part.isMimeType("multipart/*")) {
MimeMultipart multipart = (MimeMultipart) part.getContent();
int partCount = multipart.getCount();
for (int i = 0; i < partCount; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
String disp = bodyPart.getDisposition();
if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
flag = true;
} else if (bodyPart.isMimeType("multipart/*")) {
flag = isContainAttachment(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 = isContainAttachment((Part) part.getContent());
}
return flag;
}
/**
* 判断邮件是否已读
*
* @param msg 邮件内容
* @return 如果邮件已读返回true, 否则返回false
* @throws MessagingException
*/
public boolean isSeen(MimeMessage msg) throws MessagingException {
return msg.getFlags().contains(Flags.Flag.SEEN);
}
/**
* 判断邮件是否需要阅读回执
*
* @param msg 邮件内容
* @return 需要回执返回true, 否则返回false
* @throws MessagingException
*/
public boolean isReplySign(MimeMessage msg) throws MessagingException {
boolean replySign = false;
String[] headers = msg.getHeader("Disposition-Notification-To");
if (headers != null)
replySign = true;
return replySign;
}
/**
* 获得邮件的优先级
*
* @param msg 邮件内容
* @return 1(High):紧急 3:普通(Normal) 5:低(Low)
* @throws MessagingException
*/
public String getPriority(MimeMessage msg) throws MessagingException {
String priority = "普通";
String[] headers = msg.getHeader("X-Priority");
if (headers != null) {
String headerPriority = headers[0];
if (headerPriority.indexOf("1") != -1 || headerPriority.indexOf("High") != -1)
priority = "紧急";
else if (headerPriority.indexOf("5") != -1 || headerPriority.indexOf("Low") != -1)
priority = "低";
else
priority = "普通";
}
return priority;
}
/**
* 获得邮件文本内容
*
* @param part 邮件体
* @param content 存储邮件文本内容的字符串
* @throws MessagingException
* @throws IOException
*/
public void getMailTextContent(Part part, StringBuffer content) throws MessagingException, IOException {
// 如果是文本类型的附件，通过getContent方法可以取到文本内容，但这不是我们需要的结果，所以在这里要做判断
boolean isContainTextAttach = part.getContentType().indexOf("name") > 0;
if (part.isMimeType("text/*") && !isContainTextAttach) {
content.append(part.getContent().toString());
} else if (part.isMimeType("message/rfc822")) {
getMailTextContent((Part) part.getContent(), content);
} else if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent();
int partCount = multipart.getCount();
for (int i = 0; i < partCount; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
getMailTextContent(bodyPart, content);
}
}
}
/**
* 保存附件
*
* @param part 邮件中多个组合体中的其中一个组合体
* @param destDir 附件保存目录
* @throws UnsupportedEncodingException
* @throws MessagingException
* @throws FileNotFoundException
* @throws IOException
*/
public void saveAttachment(Part part, String destDir)
throws UnsupportedEncodingException, MessagingException, FileNotFoundException, IOException {
if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent(); // 复杂体邮件
// 复杂体邮件包含多个邮件体
int partCount = multipart.getCount();
for (int i = 0; i < partCount; i++) {
// 获得复杂体邮件中其中一个邮件体
BodyPart bodyPart = multipart.getBodyPart(i);
// 某一个邮件体也有可能是由多个邮件体组成的复杂体
String disp = bodyPart.getDisposition();
if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
InputStream is = bodyPart.getInputStream();
saveFile(is, 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);
}
}
/**
* 读取输入流中的数据保存至指定目录
*
* @param is 输入流
* @param fileName 文件名
* @param destDir 文件存储目录
* @throws FileNotFoundException
* @throws IOException
*/
private void saveFile(InputStream is, String destDir, String fileName)
throws FileNotFoundException, IOException {
BufferedInputStream bis = new BufferedInputStream(is);
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(destDir + fileName)));
int len = -1;
while ((len = bis.read()) != -1) {
bos.write(len);
bos.flush();
}
bos.close();
bis.close();
}
/**
* 文本解码
*
* @param encodeText 解码MimeUtility.encodeText(String text)方法编码后的文本
* @return 解码后的文本
* @throws UnsupportedEncodingException
*/
public String decodeText(String encodeText) throws UnsupportedEncodingException {
if (encodeText == null || "".equals(encodeText)) {
return "";
} else {
return MimeUtility.decodeText(encodeText);
}
}
}MyMail.java
public class MyMail {
public static void main(String[] args) {
try {
SendMailUtil mailUtil = new SendMailUtil("用户名", "密码", "发件人邮箱");
mailUtil.setTo("收件人邮箱");
mailUtil.send("测试", "测试邮件");
} catch (EmailException | GeneralSecurityException | UnsupportedEncodingException | MessagingException e) {
throw new RuntimeException(e);
}
}
}
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