package com.fwtest;
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;
import java.util.Scanner;
public class EmailUtil {
public static void main(String[] args) throws Exception {
System.out.println(""
+ " _______.___________. ___ .______ .___________.\n"
+ " / | | / \\ | _ \\ | |\n"
+ " | (----`---| |----` / ^ \\ | |_) | `---| |----`\n"
+ " \\ \\ | | / /_\\ \\ | / | | \n"
+ ".----) | | | / _____ \\ | |\\ \\----. | | \n"
+ "|_______/ |__| /__/ \\__\\ | _| `._____| |__| \n");
receive("emailAddress", "password");
}
public static void receive(String emailAddress, String password) throws Exception {
String port = "110";
String servicePath = "192.168.10.100";
// 准备连接服务器的会话信息
Properties props = new Properties();
props.setProperty("mail.store.protocol", "pop3");
props.setProperty("mail.pop3.port", port);
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(emailAddress, password);
// 获得收件箱
Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_WRITE); //打开收件箱
System.out.println("账户: " + emailAddress);
System.out.println("未读邮件数: " + folder.getUnreadMessageCount());
System.out.println("删除邮件数: " + folder.getDeletedMessageCount());
System.out.println("新邮件: " + folder.getNewMessageCount());
System.out.println("邮件总数: " + folder.getMessageCount());
Message[] messages = folder.getMessages(); // 所有邮件
//解析
parseMessage(messages);
//释放
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) {
try {
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; i < messages.length; i++) {
MimeMessage msg = (MimeMessage) messages[i];
System.out.println("------------------解析第" + msg.getMessageNumber() + "/" + messages.length + "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) {
String name = saveAttachment(msg, "D:\\pop3test\\" + msg.getSubject() + "_" + i + "_"); //保存附件
System.out.println("附件名:" + name);
}
StringBuffer content = new StringBuffer(30);
//解析邮件正文
getMailTextContent(msg, content);
System.out.println("邮件正文：{" + content + "}");
System.out.println("------------------第" + msg.getMessageNumber() + "/" + messages.length + "封邮件解析结束--------------------");
System.out.println();
}
} catch (MessagingException | IOException e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
}
/**
* 获得邮件主题
*
* @param msg 邮件内容
* @return 解码后的邮件主题
* @throws UnsupportedEncodingException
* @throws MessagingException
*/
public static String getSubject(MimeMessage msg) throws UnsupportedEncodingException, MessagingException {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
String subject = msg.getSubject();
if (subject != null) {
subject = MimeUtility.decodeText(subject);
}
return subject != null ? subject : "";
}
/**
* 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 {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
String from = "";
Address[] froms = msg.getFrom();
if (froms == null || froms.length <= 0) {
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 = "null";
}
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 {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
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 E HH:mm
* @throws MessagingException
*/
public static String getSentDate(MimeMessage msg, String pattern) throws MessagingException {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
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 {
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))) {
return true;
} else if (bodyPart.isMimeType("multipart/*")) {
if (isContainAttachment(bodyPart)) {
return true;
}
} else {
String contentType = bodyPart.getContentType();
if (contentType.contains("application") || contentType.contains("name")) {
return true;
}
}
}
} else if (part.isMimeType("message/rfc822")) {
return isContainAttachment((Part) part.getContent());
}
return false;
}
/**
* 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 {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
boolean isSeen = false;
Flags flags = msg.getFlags();
Flags.Flag[] flagArray = flags.getSystemFlags();
for (Flags.Flag flag : flagArray) {
if (flag == Flags.Flag.SEEN) {
isSeen = true;
break;
}
}
return isSeen;
}
/**
* 判断邮件是否需要回执
*
* @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 {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
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 {
if (msg == null) {
throw new MessagingException("未找到要解析的邮件!");
}
String priority = "普通";
String[] headers = msg.getHeader("X-Priority");
if (headers != null && headers.length > 0) {
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 {
if (part == null) {
throw new MessagingException("未找到要解析的邮件!");
}
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
* @return 文件名
* @throws UnsupportedEncodingException
* @throws MessagingException
* @throws FileNotFoundException
* @throws IOException
*/
public static String saveAttachment(Part part, String destDir) throws UnsupportedEncodingException, MessagingException, FileNotFoundException, IOException {
if (part == null) {
throw new MessagingException("未找到要解析的邮件!");
}
String fileName = "";
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);
String disp = bodyPart.getDisposition();
if (disp != null && (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {
fileName = MimeUtility.decodeText(bodyPart.getFileName());
saveFile(fileName, bodyPart.getInputStream(), destDir);
} else if (bodyPart.isMimeType("multipart/*")) {
saveAttachment(bodyPart, destDir);
} else {
fileName = bodyPart.getFileName();
if (fileName != null && fileName.toLowerCase().indexOf("GB2312") != -1) {
fileName = MimeUtility.decodeText(fileName);
saveFile(fileName, bodyPart.getInputStream(), destDir);
}
}
}
} else if (part.isMimeType("message/rfc822")) {
saveAttachment((Part) part.getContent(), destDir);
}
return fileName;
}
/**
* 读取输入流中的数据保存至指定目录
*
* @param fileName 文件名
* @param in 输入流
* @param destDir 文件存储目录
* @throws FileNotFoundException
* @throws IOException
*/
private static void saveFile(String fileName, InputStream in, String destDir) throws FileNotFoundException, IOException {
if (fileName == null || destDir == null) {
throw new IOException("文件名或存储目录不能为空!");
}
File file = new File(destDir + fileName);
BufferedInputStream bis = new BufferedInputStream(in);
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
// 获取文件的总大小
int fileSize = in.available();
byte[] buffer = new byte[1024];
int bytesRead;
int totalBytesRead = 0;
System.out.print("保存进度: [");
while ((bytesRead = bis.read(buffer)) != -1) {
bos.write(buffer, 0, bytesRead);
totalBytesRead += bytesRead;
// 计算当前进度
int progress = (int) (totalBytesRead * 100.0 / fileSize);
// 打印进度条
System.out.print("\r保存进度: [");
for (int i = 0; i < 50; i++) {
if (i < progress / 2) {
System.out.print("#");
} else {
System.out.print(" ");
}
}
System.out.print("] " + progress + "%");
}
// 保证最后显示 100%
System.out.print("\r保存进度: [##################################################] 100%\n");
bos.close();
bis.close();
}
}
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