通过使用java mail来实现读取163邮箱，qq邮箱的邮件内容。
1.代码实现
创建springboot项目，引入依赖包
<!--mail-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
实现类
import com.sun.mail.imap.IMAPFolder;
import com.sun.mail.imap.protocol.IMAPProtocol;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.util.ObjectUtils;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
public class ShowMail {
public static String NORM_DATETIME_PATTERN = "yyyy-MM-dd hh:mm:ss";
private MimeMessage mimeMessage;
private String saveAttachPath = "";
private StringBuffer bodyText = new StringBuffer();
public ShowMail(MimeMessage mimeMessage) {
this.mimeMessage = mimeMessage;
}
public String getFrom() throws MessagingException {
InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();
String from = address[0].getAddress();
if (from == null) {
from = "";
}
String personal = address[0].getPersonal();
if (personal == null) {
personal = "";
}
String fromAddr = null;
if (personal != null || from != null) {
fromAddr = personal + "<" + from + ">";
}
return fromAddr;
}
public String getMailAddress(String type) throws MessagingException, UnsupportedEncodingException {
if (ObjectUtils.isEmpty(type)) {
return "";
}
String addType = type.toUpperCase();
if (!addType.equals("TO") && !addType.equals("CC") && !addType.equals("BCC")) {
return "";
}
InternetAddress[] address;
if (addType.equals("TO")) {
address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.TO);
} else if (addType.equals("CC")) {
address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.CC);
} else {
address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.BCC);
}
if (ObjectUtils.isEmpty(address)) {
return "";
}
StringBuilder mailAddr = new StringBuilder();
String emailAddr;
String personal;
for (int i = 0; i < address.length; i++) {
emailAddr = address[i].getAddress();
if (emailAddr == null) {
emailAddr = "";
} else {
emailAddr = MimeUtility.decodeText(emailAddr);
}
personal = address[i].getPersonal();
if (personal == null) {
personal = "";
} else {
personal = MimeUtility.decodeText(personal);
}
mailAddr.append(",").append(personal).append("<").append(emailAddr).append(">");
}
return mailAddr.toString().substring(1);
}
public String getSubject() throws MessagingException, UnsupportedEncodingException {
String subject = MimeUtility.decodeText(mimeMessage.getSubject());
if (subject == null) {
subject = "";
}
return subject;
}
public String getSentDate() throws MessagingException {
Date sentDate = mimeMessage.getSentDate();
SimpleDateFormat format = new SimpleDateFormat(NORM_DATETIME_PATTERN);
return format.format(sentDate);
}
public String getBodyText() {
return bodyText.toString();
}
public void getMailContent(Part part) throws MessagingException, IOException {
String contentType = part.getContentType();
int nameIndex = contentType.indexOf("name");
boolean conName = false;
if (nameIndex != -1) {
conName = true;
}
if (part.isMimeType("text/plain") && conName == false) {
bodyText.append((String) part.getContent());
} else if (part.isMimeType("text/html") && conName == false) {
bodyText.append((String) part.getContent());
} else if (part.isMimeType("multipart
public boolean getReplySign() throws MessagingException {
boolean replySign = false;
String needReply[] = mimeMessage.getHeader("Disposition-Notification-To");
if (needReply != null) {
replySign = true;
}
return replySign;
}
public boolean isNew() throws MessagingException {
boolean isNew = false;
Flags flags = mimeMessage.getFlags();
Flags.Flag[] flag = flags.getSystemFlags();
for (int i = 0; i < flag.length; i++) {
if (flag[i] == Flags.Flag.SEEN) {
isNew = true;
}
}
return isNew;
}
public boolean isContainAttach(Part part) throws MessagingException, IOException {
boolean attachFlag = false;
if (part.isMimeType("multipart
public void saveAttachMent(Part part) throws MessagingException, IOException {
String fileName;
if (part.isMimeType("multipart
public void setAttachPath(String attachPath) {
this.saveAttachPath = attachPath;
}
public String getAttachPath() {
return saveAttachPath;
}
private void saveFile(String fileName, InputStream in) throws IOException {
String osName = System.getProperty("os.name");
String storeDir = this.getAttachPath();
if (null == osName) {
osName = "";
}
if (osName.toLowerCase().indexOf("win") != -1) {
if (ObjectUtils.isEmpty(storeDir))
storeDir = "C:\\tmp";
} else {
storeDir = "/tmp";
}
// fileName=fileName.replace("=?", "");
// fileName=fileName.replace("?=", "");
// fileName = fileName.substring(fileName.length() - 6, fileName.length());
FileOutputStream fos = new FileOutputStream(new File(storeDir + File.separator + fileName));
IOUtils.copy(in, fos);
IOUtils.closeQuietly(fos);
IOUtils.closeQuietly(in);
}
public static Message[] getWEMessage(String host, String username, String password, String protocol) throws MessagingException {
//创建属性对象
Properties props = System.getProperties();
props.setProperty("mail.store.protocol", protocol);
//创建会话
Session session = Session.getDefaultInstance(props, null);
//存储对象
Store store = session.getStore(protocol);
//连接
store.connect(host, username, password);
//创建目录对象
Folder folder = store.getFolder("INBOX");
if (folder instanceof IMAPFolder) {
IMAPFolder imapFolder = (IMAPFolder)folder;
//javamail中使用id命令有校验checkOpened, 所以要去掉id方法中的checkOpened();
imapFolder.doCommand(new IMAPFolder.ProtocolCommand() {
public Object doCommand(IMAPProtocol p) throws com.sun.mail.iap.ProtocolException {
p.id("FUTONG");
return null;
}
});
}
if(folder != null) {
folder.open(Folder.READ_WRITE);
}
return folder.getMessages();
}
public static Message[] getQQMessage(String host, String username, String password, String protocol) throws MessagingException {
//创建属性对象
Properties props = new Properties();
props.put("mail.store.protocol", protocol);
//创建会话
Session session = Session.getDefaultInstance(props, null);
//存储对象
Store store = session.getStore(protocol);
//连接
store.connect(host,username,password);
//创建目录对象
Folder folder = store.getFolder("Inbox");
if(folder != null) {
folder.open(Folder.READ_WRITE);
}
return folder.getMessages();
}
public static List<Message> filterMessage(Message[] messages, String fromMail, String startDate) throws MessagingException, ParseException {
List<Message> messageList = new ArrayList<>();
if (ObjectUtils.isEmpty(messages)) {
return messageList;
}
boolean isEnptyFromMail = ObjectUtils.isEmpty(fromMail);
boolean isEnptyStartDate = ObjectUtils.isEmpty(startDate);
if (isEnptyFromMail && isEnptyStartDate) {
return Arrays.asList(messages);
}
String from;
for (Message message: messages) {
from = null;
if(message.getFrom() != null) {
from = (message.getFrom()[0]).toString();
}
if (isEnptyFromMail) {
if (message.getSentDate() != null && new SimpleDateFormat(NORM_DATETIME_PATTERN).parse(startDate).getTime() > message.getSentDate().getTime()) {
continue;
}
} else if (null != from && from.contains(fromMail)) {
if (!isEnptyStartDate && new SimpleDateFormat(NORM_DATETIME_PATTERN).parse(startDate).getTime() > message.getSentDate().getTime()) {
continue;
}
} else {
continue;
}
messageList.add(message);
}
return messageList;
}
public static void printMailMessage(List<Message> messageList) throws IOException, MessagingException {
System.out.println("邮件数量:" + messageList.size());
ShowMail re;
Message message;
for (int i = 0, leng = messageList.size(); i < leng; i++) {
message = messageList.get(i);
re = new ShowMail((MimeMessage) message);
System.out.println("邮件【" + i + "】主题:" + re.getSubject());
System.out.println("邮件【" + i + "】发送时间:" + re.getSentDate());
System.out.println("邮件【" + i + "】是否需要回复:" + re.getReplySign());
System.out.println("邮件【" + i + "】是否已读:" + re.isNew());
System.out.println("邮件【" + i + "】是否包含附件:" + re.isContainAttach( message));
System.out.println("邮件【" + i + "】发送人地址:" + re.getFrom());
System.out.println("邮件【" + i + "】收信人地址:" + re.getMailAddress("to"));
System.out.println("邮件【" + i + "】抄送:" + re.getMailAddress("cc"));
System.out.println("邮件【" + i + "】暗抄:" + re.getMailAddress("bcc"));
System.out.println("邮件【" + i + "】发送时间:" + re.getSentDate());
System.out.println("邮件【" + i + "】邮件ID:" + ((MimeMessage) message).getMessageID());
re.getMailContent(message);
System.out.println("邮件【" + i + "】正文内容:\r\n" + re.getBodyText());
re.setAttachPath("D:\\Download\\mailFile\\");
re.saveAttachMent(message);
}
}
public static void main(String[] args) throws MessagingException, IOException, ParseException {
//163登录信息
//邮件服务器
String host = "mail.xx.com";
//邮箱账号
String username = "xx";
//授权码
String password = "yy";
//协议
String protocol = "imaps";
//只读取该邮箱发来的邮件
String fromMail = null;
//只读取该日期以后的邮件
String startDate = null;
List<Message> messageList = filterMessage(getWEMessage(host, username, password, protocol), fromMail, startDate);
printMailMessage(messageList);
//qq登录信息
String host2 = "imap.qq.com";
String username2 = "xx";
String password2 = "yy";
// String protocol2 = "imaps";
String protocol2 = "pop3";
String fromMail2 = null;
String startDate2 = null;
List<Message> messageList2 = filterMessage(getQQMessage(host2, username2, password2, protocol2), fromMail2, startDate2);
printMailMessage(messageList2);
}
}2.配置授权码
163邮箱：
qq邮箱：
3.实现效果：
运行main方法，查看控制台：
邮件数量:xx
邮件【0】主题:欢迎您使用xx邮箱！
邮件【0】发送时间:xx
邮件【0】是否需要回复:false
邮件【0】是否已读:true
邮件【0】是否包含附件:false
邮件【0】发送人地址:xx
邮件【0】收信人地址:xx
邮件【0】抄送:
邮件【0】暗抄:
邮件【0】发送时间:xx
邮件【0】邮件ID:xx
邮件【0】正文内容:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>欢迎使用</title>
<style>
body, div, p, img {
padding: 0;
margin: 0;
font-family: 'Microsoft Yahei', "PingFang SC", "Hiragino Sans GB", "wenquanyi micro hei", Arial, Helvetica, "STHeiti", sans-serif;
}
.contain {
width: 700px;
margin: 0 auto;
font-size: 0;
}
.wrap {
position: relative;
}
.wrap .welcome {
position: absolute;
width: 290px;
left: 75px;
top: 100px;
font-size: 18px;
color: #fff;
line-height: 32px;
font-weight: 500;
}
.wrap .welcome p.indentation {
font-size: 16px;
font-weight: normal;
}
.wrap a {
position: absolute;
display: block;
width: 104px;
height: 39px;
}
.wrap a.mobile{
left: 501px;
top: 434px;
}
.wrap a.pc{
left: 501px;
top: 485px;
}
</style>
</head>
<body>
<div class="contain">
<div class="wrap">
<div class="welcome">
<p class="indentation-title">尊敬的xx：</p>
<p class="indentation">您好，您的邮箱已开通。</p>
</div>
</div>
</div>
</body>
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