一、配置
smtp协议可以用来发送邮件，IMAP协议可以用来读取邮件。QQ邮箱设置中开启POP3协议。发送邮件javaMail-发送邮件
二、代码实现
参看了一篇几年前的博客，拿过来进行了一些改造，只是一个基版，一些邮箱的东西什么可以放到配置文件中，因暂时没有需求，暂时这样，记录一下，用到在进行升级改造。（POP3是双向的，如果你要进行删除操作，邮件服务器上也会删除邮件）java代码网上博客很多了，这两天拿来研究一下，做个笔记
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
/**
* 使用POP3协议解析邮件帮助类
*
* @author bzs on 2018/6/28.
*/
@Slf4j
public class ParsingEmailUtil {
public static void main(String[] args) throws Exception{
resceive("**********@163.com", "*****");
}
/**
* 获取邮箱信息
*
* @param emailAdress 需要解析的邮箱地址
* @param password 邮箱的授权密码
* @throws Exception
*/
public static void resceive(String emailAdress, String password) throws Exception {
String port = "110"; // 端口号
String servicePath = "pop.163.com"; // 服务器地址
// 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.pop3.port", port); // 端口
props.setProperty("mail.pop3.host", servicePath); // pop3服务器
// 创建Session实例对象
Session session = Session.getInstance(props);
Store store = session.getStore("pop3");
store.connect(emailAdress, 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 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
log.warn("邮件总数: {}", folder.getMessageCount());
// 得到收件箱中的所有邮件,并解析
Message[] messages = folder.getMessages();
//解析邮件
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();
}
/**
* 解析邮件
*
* @param messages 要解析的邮件列表
*/
public static 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];
log.info("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
log.warn("主题: {}" , getSubject(msg));
log.warn("发件人: {}" , getFrom(msg));
log.warn("收件人：{}" , getReceiveAddress(msg, null));
log.warn("发送时间：{}" , getSentDate(msg, null));
log.warn("是否已读：{}" , isSeen(msg));
log.warn("邮件优先级：{}" , getPriority(msg));
log.warn("是否需要回执：{}" , isReplySign(msg));
log.warn("邮件大小：{}" , msg.getSize() * 1024 + "kb");
boolean isContainerAttachment = isContainAttachment(msg);
log.warn("是否包含附件：{}" ,isContainerAttachment);
if (isContainerAttachment) {
saveAttachment(msg, "d:\\log\\" + msg.getSubject() + "_" + i + "_"); //保存附件
}
StringBuffer content = new StringBuffer(30);
//解析邮件正文
getMailTextContent(msg, content);
log.warn("邮件正文：{}" , content);
log.info("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
System.out.println();
}
}
/**
* 删除邮件
*
* @param messages 要删除邮件列表
*/
public static 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 static 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 static 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;
}
/**
* 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 static 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 static 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 part 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 static 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 static 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 static 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 static 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 static 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 static void saveAttachment(Part part, String destDir) throws MessagingException, 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 static 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 static String decodeText(String encodeText) throws UnsupportedEncodingException {
if (encodeText == null || "".equals(encodeText)) {
return "";
} else {
return MimeUtility.decodeText(encodeText);
}
}
}
public void readMail(){
try {
// 1. 设置连接信息, 生成一个 Session
Properties props = new Properties();
// 用空的 Properties也行这里
props.setProperty("mail.smtp.host", "smtp.qq.com");
props.setProperty("mail.smtp.auth", "true");
// 解决邮件下载慢的问题，因为我邮件下载速度很快，所以没有验证这段代码
//props.setProperty("mail.imap.partialfetch", "false");
//props.setProperty("mail.imaps.partialfetch", "false");
Session session = Session.getDefaultInstance(props);
// 2. 获取 Store 并连接到服务器
// 设置连接相关信息，file 可以直接指定邮箱的某个文件夹
// 邮件在邮件服务器上是在每个用户名下，设置不同的文件，收件箱默认为“INBOX”
// URLName urlname = new URLName("pop3","pop.qq.com",110,"INBOX","[email protected]","你的授权码");
URLName urlname = new URLName("pop3","pop.qq.com",110,null,"[email protected]","授权码");
Store store = session.getStore(urlname);
store.connect();
// 默认父目录
Folder folder = store.getDefaultFolder();
if (folder == null) {
System.out.println("服务器不可用");
return;
}
String defaultFolderName = folder.getName();
System.out.println("默认信箱名:" + defaultFolderName);
// 默认目录列表
Folder[] folders = folder.list();
System.out.println("默认目录下的子目录数: " + folders.length);
System.out.println("-----根目录下的包含的文件名-----");
for(int i = 0; i < folders.length; i++) {
System.out.println("【目录下的文件名】：【" + folders[i].getFullName() + "】");
}
System.out.println("---------------");
// 获取收件箱
Folder popFolder = folder.getFolder("INBOX");
// 可读邮件,可以删邮件的模式打开目录
popFolder.open(Folder.HOLDS_FOLDERS);
// 4. 列出来收件箱 下所有邮件
Message[] messages = popFolder.getMessages();
// 取出来邮件数
int msgCount = popFolder.getMessageCount();
System.out.println("共有邮件: " + msgCount + "封");
// FetchProfile fProfile = new FetchProfile();// 选择邮件的下载模式,
// 根据网速选择不同的模式
// fProfile.add(FetchProfile.Item.ENVELOPE);
// folder.fetch(messages, fProfile);// 选择性的下载邮件
// 5. 循环处理每个邮件并实现邮件转为新闻的功能
for (int i = 0; i < msgCount; i++) {
// 单个邮件
System.out.println("第" + i +"封邮件开始");
mailReceiver(messages[i]);
System.out.println("第" + i +"封邮件结束");
//邮件读取用来校验
messages[i].writeTo(new FileOutputStream("D:/pop3MailReceiver"+ i +".eml"));
}
// 7. 关闭 Folder 会真正删除邮件, false 不删除
popFolder.close(false);
// 8. 关闭 store, 断开网络连接
store.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 解析邮件
*/
private void mailReceiver(Message msg)throws Exception{
System.out.println("【邮件ID】:【" + msg.getMessageNumber() + "】");
System.out.println("【邮件主题】:【" + MimeUtility.decodeText(msg.getSubject()) + "】");
System.out.println("【邮件发送时间】:【" + this.getSentDate(msg) + "】");
// 发件人信息
Address[] froms = msg.getFrom();
if(froms != null) {
InternetAddress addr = (InternetAddress)froms[0];
System.out.println("【发件人地址】:【" + addr.getAddress() + "】");
System.out.println("【发件人显示名】:【" + addr.getPersonal() + "】");
}
// System.out.println("【收件人】:【" + msg.getRecipients(Message.RecipientType.TO) + "】");
System.out.println("【是否需要回复】:【" + this.needReplyState(msg) + "】");
System.out.println("【是否需要回复】:【" + this.isNew(msg) + "】");
// getContent() 是获取包裹内容, Part相当于外包装
Object o = msg.getContent();
if(o instanceof Multipart) {
Multipart multipart = (Multipart) o ;
reMultipart(multipart);
} else if (o instanceof Part){
Part part = (Part) o;
rePart(part);
} else {
System.out.println("【邮件内容类型】:【" + msg.getContentType() + "】");
System.out.println("【内容】:【" + msg.getContent() + "】");
}
}
/**
* @param part 解析内容
* @throws Exception
*/
private void rePart(Part part) throws MessagingException, IOException {
if (part.getDisposition() != null) {
String strFileNmae = MimeUtility.decodeText(part.getFileName());
//MimeUtility.decodeText解决附件名乱码问题
System.out.println("【发现附件】:【 " + MimeUtility.decodeText(part.getFileName()) + "】");
System.out.println("【内容类型】:【 " + MimeUtility.decodeText(part.getContentType()) + "】");
System.out.println("【附件内容】:【" + part.getContent() + "】");
InputStream in = part.getInputStream();
// 打开附件的输入流
// 读取附件字节并存储到文件中
java.io.FileOutputStream out = new FileOutputStream(strFileNmae);
int data;
while((data = in.read()) != -1) {
out.write(data);
}
in.close();
out.close();
} /*else {
if(part.getContentType().startsWith("text/plain")) {
System.out.println("文本内容：" + part.getContent());
} else {
//System.out.println("HTML内容：" + part.getContent());
}
}*/
}
/**
* @param multipart // 接卸包裹（含所有邮件内容(包裹+正文+附件)）
* @throws Exception
*/
private void reMultipart(Multipart multipart) throws Exception {
//System.out.println("邮件共有" + multipart.getCount() + "部分组成");
// 依次处理各个部分
for (int j = 0, n = multipart.getCount(); j < n; j++) {
//System.out.println("处理第" + j + "部分");
Part part = multipart.getBodyPart(j);//解包, 取出 MultiPart的各个部分, 每部分可能是邮件内容,
// 也可能是另一个小包裹(MultipPart)
// 判断此包裹内容是不是一个小包裹, 一般这一部分是 正文 Content-Type: multipart/alternative
if (part.getContent() instanceof Multipart) {
Multipart p = (Multipart) part.getContent();// 转成小包裹
//递归迭代
reMultipart(p);
} else {
rePart(part);
}
}
}
/**
*获取邮件日期
*/
private String getSentDate(Message message){
String emailSendDate = "邮件发送的时间出错";
try {
Date date = message.getSentDate();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
emailSendDate = format.format(date);
} catch (MessagingException e) {
e.printStackTrace();
}
return emailSendDate;
}
public String needReplyState(Message message) throws MessagingException {
String replyFlag = "此邮件不需要回复";
String [] needReply = message.getHeader("Disposition-Notification-To");
if (null != needReply){
replyFlag = "邮件需要回复";
}
return replyFlag;
}
public String isNew(Message message) throws MessagingException {
Flags flags = message.getFlags();
Flags.Flag[] flag = flags.getSystemFlags();
for (int i = 0; i<flag.length;i++){
if (Flags.Flag.SEEN == flag[i]){
return "邮件未读";
}
}
return "邮件已读";
}
/**
* @param args
*/
public static void main(String[] args) {
MailUtil mailUtil = new MailUtil();
mailUtil.readMail();
}
