1、定义一个简单的邮件收取类,作用连接邮件服务器,然后收取inbox里的邮件,返回Message[]
package com.athena.mail.receiver;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
/**
* 简单的邮件接收类
*
* @author athena
*
*/
public class SimpleMailReceiver {
/**
* 收取收件箱里的邮件
*
* @param props
* 为邮件连接所需的必要属性
* @param authenticator
* 用户验证器
* @return Message数组(邮件数组)
*/
public static Message[] fetchInbox(Properties props, Authenticator authenticator) {
return fetchInbox(props, authenticator, null);
}
/**
* 收取收件箱里的邮件
*
* @param props
* 收取收件箱里的邮件
* @param authenticator
* 用户验证器
* @param protocol
* 使用的收取邮件协议,有两个值"pop3"或者"imap"
* @return Message数组(邮件数组)
*/
public static Message[] fetchInbox(Properties props, Authenticator authenticator, String protocol) {
Message[] messages = null;
Session session = Session.getDefaultInstance(props, authenticator);
// session.setDebug(true);
Store store = null;
Folder folder = null;
try {
store = protocol == null || protocol.trim().length() == 0 ? session.getStore() : session.getStore(protocol);
store.connect();
folder = store.getFolder("INBOX");// 获取收件箱
folder.open(Folder.READ_ONLY); // 以只读方式打开
messages = folder.getMessages();
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
return messages;
}
}
2、定义一个邮件解析类,用来解析上面返回的Message[]
package com.athena.mail.receiver;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.List;
import javax.activation.DataSource;
import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Store;
import javax.mail.internet.MimeMessage;
import org.apache.commons.mail.util.MimeMessageParser;
/**
* 邮件解析类
*
* @author athena
*
*/
public class MessageParser {
/**
* 邮件附件存放位置
*/
private static final String folder = "D:\\upload";
private static void parse(Message message) {
try {
MimeMessageParser parser = new MimeMessageParser((MimeMessage) message).parse();
String from = parser.getFrom(); // 获取发件人地址
List<Address> cc = parser.getCc();// 获取抄送人地址
List<Address> to = parser.getTo(); // 获取收件人地址
String replyTo = parser.getReplyTo();// 获取回复邮件时的收件人
String subject = parser.getSubject(); // 获取邮件主题
String htmlContent = parser.getHtmlContent(); // 获取Html内容
String plainContent = parser.getPlainContent(); // 获取纯文本邮件内容(注:有些邮件不支持html)
System.out.println(subject);
List<DataSource> attachments = parser.getAttachmentList(); // 获取附件,并写入磁盘
for (DataSource ds : attachments) {
BufferedOutputStream outStream = null;
BufferedInputStream ins = null;
try {
String fileName = folder + File.separator + ds.getName();
outStream = new BufferedOutputStream(new FileOutputStream(fileName));
ins = new BufferedInputStream(ds.getInputStream());
byte[] data = new byte[2048];
int length = -1;
while ((length = ins.read(data)) != -1) {
outStream.write(data, 0, length);
}
outStream.flush();
System.out.println("附件:" + fileName);
} finally {
if (ins != null) {
ins.close();
}
if (outStream != null) {
outStream.close();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void parse(Message... messages) {
if (messages == null || messages.length == 0) {
System.out.println("没有任何邮件");
} else {
for (Message m : messages) {
parse(m);
}
// 最后关闭连接
if (messages[0] != null) {
Folder folder = messages[0].getFolder();
if (folder != null) {
try {
Store store = folder.getStore();
folder.close(false);// 参数false表示对邮件的修改不传送到服务器上
if (store != null) {
store.close();
}
} catch (MessagingException e) {
// ignore
}
}
}
}
}
}
3、可以看到我在第1步的SimpleMailReceiver的方法fetchInbox方法的参数,其中一个是Properties,一个是Authenticator,做个邮件开发的都知道,这里不做解释。为了方便用户使用,我为多个邮件服务器的一些基本信息进行了封装,如下:
package com.athena.mail.props;
import java.util.Properties;
/**
* 服务器种类:提供了网易和腾讯的企业邮箱(这两种已经测试通过),和谷歌(测试未通过) 后期有需要可以扩展
*
* @author athena
*/
public enum HostType {
NETEASE {
@Override
public Properties getProperties() {
Properties defaults = new Properties();
defaults.put("mail.pop3.host", "pop.163.com");
defaults.put("mail.imap.host", "imap.163.com");
defaults.put("mail.store.protocol", "pop3"); // 默认使用pop3收取邮件
return defaults;
}
},
TENCENT {
@Override
public Properties getProperties() {
Properties defaults = new Properties();
defaults.put("mail.pop3.host", "pop.exmail.qq.com");
defaults.put("mail.imap.host", "imap.exmail.qq.com");
defaults.put("mail.store.protocol", "pop3"); // 默认使用pop3收取邮件
return defaults;
}
},
GMAIL {
@Override
public Properties getProperties() {
Properties defaults = new Properties();
defaults.put("mail.pop3.host", "pop.gmail.com");
defaults.put("mail.pop3.port", "995");
defaults.put("mail.imap.host", "imap.gmail.com");
defaults.put("mail.imap.port", "465");
defaults.put("mail.store.protocol", "pop3"); // 默认使用pop3收取邮件
return defaults;
}
};
public abstract Properties getProperties();
}
上面类的主要作用是方便用户使用,由于不同邮件服务器使用的地址以及参数都有所不同,而这些信息不会经常变化,所以就无需让用户操作了,用户使用的时候只需要获取她需要的服务器对象即可。
4、对Authenticator也进行了简单封装
package com.athena.mail.props;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
/**
* 该类用来生成Authenticator
*
* @author athena
*
*/
public final class AuthenticatorGenerator {
/**
* 根据用户名和密码,生成Authenticator
*
* @param userName
* @param password
* @return
*/
public static Authenticator getAuthenticator(final String userName, final String password) {
return new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, password);
}
};
}
}
最后是一个简单的测试类:
package com.athena.mail.client;
import com.athena.mail.props.AuthenticatorGenerator;
import com.athena.mail.props.HostType;
import com.athena.mail.receiver.MessageParser;
import com.athena.mail.receiver.SimpleMailReceiver;
/**
* 邮件测试类
*
* @author athena
*
*/
public class MailTest {
public static void main(String[] args) {
MessageParser.parse(SimpleMailReceiver.fetchInbox(HostType.NETEASE.getProperties(),
AuthenticatorGenerator.getAuthenticator("youraccount", "yourpassword")));
}
}
后记:
本来对于Properties的封装我采用的继承Properties的方式,如下:
package com.athena.mail.props;
import java.util.Properties;
public class NeteaseProperties extends Properties {
private static final long serialVersionUID = -6623862312603756003L;
{
defaults = new Properties();
defaults.put("mail.pop3.host", "pop.163.com");
defaults.put("mail.imap.host", "imap.163.com");
defaults.put("mail.store.protocol", "pop3"); // 默认使用pop3收取邮件
}
}
JavaMail收取邮件并解析
最新推荐文章于 2024-08-04 10:50:44 发布