SMTP协议和POP3协议

https://blog.csdn.net/xyang81/article/details/7672745

https://blog.csdn.net/wenwen1538/article/category/2220745

https://www.cnblogs.com/xdp-gacl/p/4216311.html

package gaofeng.socket;

import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class MailClient {
	private Session session;
	private Transport ts;
	
	public void init() throws MessagingException {
		Properties props = new Properties();
		props.put("mail.transport.protocol", "smtp");
		props.put("mail.smtp.host", "smtp.163.com");
		props.put("mail.smtp.auth", "true");

		session = Session.getInstance(props);
		session.setDebug(true);
		ts = session.getTransport();
		ts.connect("smtp.163.com", "ggaofengg", "163第三方邮件客户端授权码");
	}
	public void sendMail() throws Exception {
		Message msg = createJpgMail();//createSimpleMail();
		ts.sendMessage(msg, msg.getAllRecipients());
		ts.close();
	}
	
	public MimeMessage createSimpleMail() throws Exception {
		MimeMessage message = new MimeMessage(this.session);
		message.setFrom(new InternetAddress("[email protected]"));
		message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
		message.setSubject("mm只包含文本的简单邮件");
		message.setContent("
你好啊！
", "text/html;charset=UTF-8");
		return message;
	}
	public MimeMessage createJpgMail() throws Exception {
		MimeMessage message = new MimeMessage(this.session);
		message.setFrom(new InternetAddress("[email protected]"));
		message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
		message.setSubject("mm只包含文本的简单邮件");
		
		MimeBodyPart text = new MimeBodyPart();
		text.setContent("这是一封邮件正文带图片的邮件", "text/html;charset=UTF-8");
		MimeBodyPart image = new MimeBodyPart();
		DataHandler dh = new DataHandler(new FileDataSource("G:\\21565038\\gaofengEbook\\数字图像处理java编程与实验源码\\imProcess\\images\\ch15\\jpg\\j_bird2.jpg"));
		image.setDataHandler(dh);
		image.setContentID("xxx.jpg");
		
		MimeMultipart mm = new MimeMultipart();
		mm.addBodyPart(text);
		mm.addBodyPart(image);
		mm.setSubType("related");
		
		message.setContent(mm);
		return message;
	}
	public static void main(String[] args) throws Exception {
		MailClient client = new MailClient();
		client.init();
		client.sendMail();
	}

}