Java实现读取未读邮件信息，并将未读邮件设为已读
maven导入
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.7</version>
</dependency>ShowMail
import com.sun.mail.imap.IMAPFolder;
import com.sun.mail.imap.protocol.IMAPProtocol;
import lombok.extern.slf4j.Slf4j;
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.*;
/**
邮件处理类
*/
@Slf4j
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";
}
FileOutputStream fos = new FileOutputStream(new File(storeDir + File.separator + fileName));
IOUtils.copy(in, fos);
IOUtils.closeQuietly(fos);
IOUtils.closeQuietly(in);
}
/**
* 获取阿里云邮箱信息
*
* @param host 邮件服务器
* @param username 邮箱名
* @param password 密码
* @param protocol 协议
* @return
* @throws MessagingException
*/
public static Message[] getALiYunMessage(String host, String username, String password, String protocol) throws MessagingException {
Properties props = new Properties();
Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore(protocol);
store.connect(host, username, password);
Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_ONLY);
return folder.getMessages();
}
/**
* 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 {
Properties props = System.getProperties();
props.setProperty("mail.store.protocol", protocol);
Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore(protocol);
store.connect(host, username, password);
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();
}
/**
* 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 = (message.getFrom()[0]).toString();
if (isEnptyFromMail) {
if (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 List printMailMessage(List<Message> messageList) throws IOException, MessagingException {
log.info("当前邮件数量为"+messageList.size());
ShowMail re;
Message message;
String msg = "";
List<String> newList = new ArrayList();
for (int i = 0, leng = messageList.size(); i < leng; i++) {
message = messageList.get(i);
re = new ShowMail((MimeMessage) message);
//判断邮件是否已读
if(re.isNew() == false){
re.getMailContent(message);
msg = re.getBodyText();
//如果字符串不包含中文则进行转换
if(!PubUtil.hasChineseCharacter(msg)){
msg = new String(msg.getBytes("iso-8859-1"),"utf-8");
}
newList.add(msg);
//将邮件设置为已读
message.setFlag(Flags.Flag.SEEN, true);
}
// 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);
}
return newList;
}
/**
* 测试方法
* @param args
* @throws MessagingException
* @throws IOException
* @throws ParseException
*/
public static void main(String[] args) throws MessagingException, IOException, ParseException {
// 阿里云登录信息
String host = "imap.aliyun.com";
String username = "abc@aliyun.com"; //阿里云邮箱
String password = "abc"; //阿里云邮箱密码
String protocol = "imap";
String fromMail = "";
String startDate = "";
List<Message> messageList = filterMessage(getALiYunMessage(host, username, password, protocol), fromMail, startDate);
List newList = printMailMessage(messageList);
for(int i =0;i<newList.size();i++){
System.out.println(newList.get(i));
}
// 163登录信息
// String host = "imap.163.com";
// String username = "XXX@163.com";
// String password = "授权码，不是密码";
// String protocol = "imaps";
// String fromMail = "liwei@xiaostudy.com";
// String startDate = "2020-2-24 23:35:40";
// List<Message> messageList = filterMessage(getWEMessage(host, username, password, protocol), fromMail, startDate);
//
// printMailMessage(messageList);
}
}
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