这篇文章主要利用Java语言实现读取163邮箱和qq邮箱的邮件内容，文中的示例代码讲解详细，感兴趣的小伙伴可以跟随小编一起动手试一试
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;
/**
* 附件下载后的存放目录
*/
private String saveAttachPath = "";
/**
* 存放邮件内容的StringBuffer对象
*/
private StringBuffer bodyText = new StringBuffer();
/**
* 构造函数,初始化一个MimeMessage对象
*
* @param mimeMessage
*/
public ShowMail(MimeMessage mimeMessage) {
this.mimeMessage = mimeMessage;
}
/**
* 获得发件人的地址和姓名
*
* @return
* @throws MessagingException
*/
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;
}
/**
* 获得邮件的收件人，抄送，和密送的地址和姓名，根据所传递的参数的不同
*
* @param type "to"----收件人 "cc"---抄送人地址 "bcc"---密送人地址
* @return
* @throws MessagingException
* @throws UnsupportedEncodingException
*/
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);
}
/**
* 获得邮件主题
*
* @return
* @throws MessagingException
* @throws UnsupportedEncodingException
*/
public String getSubject() throws MessagingException, UnsupportedEncodingException {
String subject = MimeUtility.decodeText(mimeMessage.getSubject());
if (subject == null) {
subject = "";
}
return subject;
}
/**
* 获得邮件发送日期
*
* @return
* @throws MessagingException
*/
public String getSentDate() throws MessagingException {
Date sentDate = mimeMessage.getSentDate();
SimpleDateFormat format = new SimpleDateFormat(NORM_DATETIME_PATTERN);
return format.format(sentDate);
}
/**
* 获得邮件正文内容
*
* @return
*/
public String getBodyText() {
return bodyText.toString();
}
/**
* 解析邮件，把得到的邮件内容保存到一个StringBuffer对象中，解析邮件
* 主要是根据MimeType类型的不同执行不同的操作，一步一步的解析
* @param part
* @throws MessagingException
* @throws IOException
*/
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/*")) {
Multipart multipart = (Multipart) part.getContent();
int counts = multipart.getCount();
for (int i = 0; i < counts; i++) {
this.getMailContent(multipart.getBodyPart(i));
}
} else if (part.isMimeType("message/rfc822")) {
this.getMailContent((Part) part.getContent());
}
}
/**
* 判断此邮件是否需要回执，如果需要回执返回"true",否则返回"false"
*
* @return
* @throws MessagingException
*/
public boolean getReplySign() throws MessagingException {
boolean replySign = false;
String needReply[] = mimeMessage.getHeader("Disposition-Notification-To");
if (needReply != null) {
replySign = true;
}
return replySign;
}
/**
* 判断此邮件是否已读，如果未读返回false,反之返回true
*
* @return
* @throws MessagingException
*/
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;
}
/**
* 判断此邮件是否包含附件
*
* @param part
* @return
* @throws MessagingException
* @throws IOException
*/
public boolean isContainAttach(Part part) throws MessagingException, IOException {
boolean attachFlag = false;
if (part.isMimeType("multipart/*")) {
Multipart mp = (Multipart) part.getContent();
BodyPart mPart;
String conType;
for (int i = 0; i < mp.getCount(); i++) {
mPart = mp.getBodyPart(i);
String disposition = mPart.getDisposition();
if (Part.ATTACHMENT.equals(disposition) || Part.INLINE.equals(disposition)) {
attachFlag = true;
} else if (mPart.isMimeType("multipart/*")) {
attachFlag = this.isContainAttach(mPart);
} else {
conType = mPart.getContentType();
if (conType.toLowerCase().indexOf("application") != -1 || conType.toLowerCase().indexOf("name") != -1){
attachFlag = true;
}
}
}
} else if (part.isMimeType("message/rfc822")) {
attachFlag = isContainAttach((Part) part.getContent());
}
return attachFlag;
}
/**
* 保存附件
*
* @param part
* @throws MessagingException
* @throws IOException
*/
public void saveAttachMent(Part part) throws MessagingException, IOException {
String fileName;
if (part.isMimeType("multipart/*")) {
Multipart mp = (Multipart) part.getContent();
BodyPart mPart;
for (int i = 0; i < mp.getCount(); i++) {
mPart = mp.getBodyPart(i);
String disposition = mPart.getDisposition();
if (Part.ATTACHMENT.equals(disposition) || Part.INLINE.equals(disposition)) {
fileName = mPart.getFileName();
if (null != fileName && fileName.toLowerCase().indexOf("gb2312") != -1) {
fileName = MimeUtility.decodeText(fileName);
}
this.saveFile(fileName, mPart.getInputStream());
} else if (mPart.isMimeType("multipart/*")) {
this.saveAttachMent(mPart);
} else {
fileName = mPart.getFileName();
if ((fileName != null) && (fileName.toLowerCase().indexOf("GB2312") != -1)) {
fileName = MimeUtility.decodeText(fileName);
this.saveFile(fileName, mPart.getInputStream());
}
}
}
} else if (part.isMimeType("message/rfc822")) {
this.saveAttachMent((Part) part.getContent());
}
}
/**
* 设置附件存放路径
*
* @param attachPath
*/
public void setAttachPath(String attachPath) {
this.saveAttachPath = attachPath;
}
/**
* 获得附件存放路径
*
* @return
*/
public String getAttachPath() {
return saveAttachPath;
}
/**
* 真正的保存附件到指定目录里
*
* @param fileName
* @param in
* @throws IOException
*/
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);
}
/**
* 获取163邮箱信息
*
* @param host
* @param username
* @param password
* @param protocol
* @return
* @throws MessagingException
*/
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();
}
/**
* 获取qq邮箱信息
*
* @param host
* @param username
* @param password
* @param protocol
* @return
* @throws MessagingException
*/
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();
}
/**
* 过滤邮箱信息
*
* @param messages
* @param fromMail 只读取该邮箱发来的邮件，如果为空则不过滤
* @param startDate 只读取该日期以后的邮件，如果为空则不过滤
* @return
* @throws MessagingException
*/
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;
}
/**
* 打印邮件
*
* @param messageList
* @throws IOException
* @throws MessagingException
*/
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>
</html>到此这篇关于Java实现读取163邮箱,qq邮箱的邮件内容的文章就介绍到这了,更多相关Java读取邮箱邮件内容内容请搜索编程学习网以前的文章希望大家以后多多支持编程学习网！
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