java 发送邮件 简单易操作

/**
 * Created by IntelliJ IDEA.
 * User: tsaowe
 * Date: 12-3-6
 * Time: 上午9:15
 */

import java.util.Date;
import java.util.Properties;

import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class MailSender {

    private String host;
    private Address from;
    private String username;
    private String password;
    private Address[] to;

    private String subject;
    private String message;

    public MailSender() {
        /* todo 这儿是发送邮件的服务器 */
        this.host = "smtp.????.???";
        try {
            /* todo 这儿填写发给别人的邮件地址,就是自己邮箱地址*/
            this.from = new InternetAddress("[e-mail]");
        } catch (AddressException e) {
            e.printStackTrace();
        }
        this.username = "[e-mail]"; //登录名,和上面邮件地址一致
        this.password = "xxxxxxxxxx";  //登录密码

        this.subject = "";
        this.message = "";
    }

    public MailSender(String host, String from, String username, String password){
        this.host = host;
        try {
            this.from = new InternetAddress(from);
        } catch (AddressException e) {
            e.printStackTrace();
        }
        this.username = username;
        this.password = password;

        this.subject = "";
        this.message = "";
    }

    public void addAddress(String to) {
        int length = 0;
        if(this.to == null || this.to.length == 0){
            length = 0;
        }else{
            length = this.to.length;
        }
        Address[] oldTo = this.to;
        this.to = new InternetAddress[length + 1];
        try {
            this.to[0] = new InternetAddress(to);
        } catch (AddressException e) {
            e.printStackTrace();
        }

        for(int i = 0; i<length; i++) {
            assert oldTo != null;
            this.to[i+1] = oldTo[i];
        }

    }

    public void setSubject(String subject) {
        this.subject = subject;
    }


    public void setMessage(String message) {
       this.message = message;
    }

    public String getMessage() {
        return this.message;
    }

    public boolean sendMail() {
        Properties props = new Properties();
        props.put("mail.smtp.host", this.host);
        props.put("mail.smtp.auth", "true");

        Session session = Session.getInstance(props, null);

        try {

            Message msg = new MimeMessage(session);
            msg.setFrom(this.from);
            Address[] address = this.to;
            msg.setRecipients(Message.RecipientType.TO, address);
            ((MimeMessage)msg).setSubject(this.subject,"utf-8");
            msg.setSentDate(new Date());

            BodyPart mdp=new MimeBodyPart();
            mdp.setContent(this.message,"text/html;charset=utf-8");
            Multipart mm=new MimeMultipart();

            mm.addBodyPart(mdp);


            msg.setContent(mm);
            msg.saveChanges();

            Transport transport = session.getTransport("smtp");
            transport.connect(host, username, password);
            transport.sendMessage(msg, msg.getAllRecipients());
            transport.close();

            System.out.println("Send mail: "+ msg.getSentDate());

            return true;

        } catch (MessagingException mex) {
            System.out.println("\n--Exception");

            System.out.println();
            Exception ex = mex;
            do {
                if (ex instanceof SendFailedException) {
                    SendFailedException sfex = (SendFailedException)ex;
                    Address[] invalid = sfex.getInvalidAddresses();
                    if (invalid != null) {
                        System.out.println("    ** Invalid Addresses");
                        for (Address anInvalid : invalid) System.out.println("         " + anInvalid);
                    }
                    Address[] validUnsent = sfex.getValidUnsentAddresses();
                    if (validUnsent != null) {
                        System.out.println("    ** ValidUnsent Addresses");
                        for (Address aValidUnsent : validUnsent) System.out.println("         " + aValidUnsent);
                    }
                    Address[] validSent = sfex.getValidSentAddresses();
                    if (validSent != null) {
                        System.out.println("    ** ValidSent Addresses");
                        for (Address aValidSent : validSent) System.out.println("         " + aValidSent);
                    }
                }
                System.out.println();
                if (ex instanceof MessagingException)
                    ex = ((MessagingException)ex).getNextException();
                else
                    ex = null;
            } while (ex != null);

            return false;
        }
    }

    public static void main(String[] args) {
        MailSender mailSenderInstance = new MailSender();
        mailSenderInstance.addAddress("[e-mail]");
        mailSenderInstance.setSubject("Test Mail");
        mailSenderInstance.setMessage("Test Mail");
        mailSenderInstance.sendMail();

    }
}