POP3协议解析邮件:
package com.bxtdata.ips.util;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
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 pengjian
* @date 2020-12-15 14:10
*/
@Slf4j
public class POP3ParsingEmailUtil {
public static void main(String[] args) throws Exception{
resceive("你的邮箱", "密码(如果是qq邮箱,则填对应授权密码,如果是企业邮箱,则是邮箱密码,企业邮箱默认授权)");
}
/**
* 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.qq.com"; // 服务器地址(此处对应qq邮箱,邮箱对应端口号和路径看下方对应图)
// 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); //第三方登录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,读写
// // 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));
boolean isContainerAttachment = isContainAttachment(msg);
log.warn("是否包含附件：{}", isContainerAttachment);
if (isContainerAttachment) {
saveAttachment(msg, "D:\\TestEmailPlace\\" + 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-------------------- ");
}
}
/**
* 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);
}else if (part.isMimeType("text/*") && part.isMimeType("image/*")){
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);
}
}
}
IMAP协议和POP3协议代码基本一致,差别在于IMAP协议可以获取邮件的状态信息以及端口号和路径:
//获得收件箱
IMAPFolder folder = (IMAPFolder) store.getFolder("INBOX");
folder.open(Folder.READ_WRITE);
log.warn("邮件总数: {}", folder.getMessageCount());
log.info("未读邮件数: {}", folder.getUnreadMessageCount());
//获取最新邮件(此种方式不支持人工干预)
Message[] messages = folder.getMessages(folder.getMessageCount() - folder.getUnreadMessageCount() +1,folder.getMessageCount());
拓展：获取最新邮件的另一种方式,保存邮件的UID,不能是MessageID,保存MessageID会增加响应时间
package com.bxtdata.ips.service.impl;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.bxtdata.ips.entity.EmailReply;
import com.bxtdata.ips.mapper.EmailReplyMapper;
import com.bxtdata.ips.service.EmailReplyService;
import com.sun.mail.pop3.POP3Folder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
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.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
/**
* @author pengjian
* @date 2020-12-07 17:35
*/
@Service
@Slf4j
public class EmailReplyServiceImpl extends ServiceImpl<EmailReplyMapper, EmailReply> implements EmailReplyService {
@Autowired
private EmailReplyService emailReplyService;
/**
* 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
*/
@Override
public List<EmailReply> resceive(String emailAdress, String password) throws Exception {
String port = "110"; // 端口号
String servicePath = "pop.exmail.qq.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); //第三方登录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,读写
// 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
List<EmailReply> emailReplyList = parseMessage(folder, messages);
//释放资源
if (folder != null) {
folder.close(true);
}
if (folder != null) {
store.close();
}
return emailReplyList;
}
/**
* 解析邮件
*
* @param messages 要解析的邮件列表
*/
public List<EmailReply> parseMessage(Folder folder,Message... messages) throws MessagingException, IOException {
if (messages == null || messages.length < 1){
List<EmailReply> list = new ArrayList<>();
return list;
}else {
// 解析所有邮件
List<EmailReply> emailReplyList = new ArrayList<>();
for (int i = 0, count = messages.length; i < count; i++) {
EmailReply emailReply = new EmailReply();
MimeMessage msg = (MimeMessage) messages[i];
//此判断为筛选符合需求的邮件，可根据自己需求自定义条件
if (isNumber(msg.getSubject().substring(msg.getSubject().lastIndexOf("_") + 1))) {
POP3Folder inbox = (POP3Folder) folder;
String uid = inbox.getUID(msg);
//查询uid是否已存数据库
QueryWrapper<EmailReply> queryWrapper = new QueryWrapper<>();
queryWrapper.eq("u_id",uid);
EmailReply check = emailReplyService.getOne(queryWrapper);
if (check == null || check.equals("")){
log.info("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- ");
emailReply.setUId(uid);
log.warn("主题: {}", getSubject(msg));
emailReply.setSubject(getSubject(msg));
//截取商品id
String dataId = msg.getSubject().substring(msg.getSubject().lastIndexOf("_") + 1);
emailReply.setDataId(Integer.valueOf(dataId));
log.warn("发件人: {}", getFrom(msg));
emailReply.setSendPeople(getFrom(msg));
log.warn("收件人：{}", getReceiveAddress(msg, null));
emailReply.setRecivePeople(getReceiveAddress(msg,null));
log.warn("发送时间：{}", getSentDate(msg, null));
emailReply.setSentDate(getSentDate(msg,null));
// boolean isContainerAttachment = isContainAttachment(msg);
// log.warn("是否包含附件：{}", isContainerAttachment);
// if (isContainerAttachment) {
// saveAttachment(msg, "D:\\TestEmailPlace" + 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);
emailReply.setContent(content.toString());
emailReply.setCreateTime(new Date());
emailReplyList.add(emailReply);
log.info("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- ");
}
}
}
return emailReplyList;
}
}
/**
* 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);
}else if (part.isMimeType("text/*") && part.isMimeType("image/*")){
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);
}
}
/**
* 判断字符串是否可转为整数
* @param str
* @return
*/
public static boolean isNumber(String str){
return str.matches("^[-+]?(([0-9]+)([.]([0-9]+))?|([.]([0-9]+))?)$");
}
}
常用邮箱的POP3 / SMTP地址及对应的端口
常用邮箱对应详情：
https://blog.csdn.net/weixin_34216107/article/details/89050316
参考链接：https://blog.csdn.net/xyang81/article/details/7675160
版权声明：本文为AnLikuangmo原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。