import javax.mail.Authenticator;import javax.mail.PasswordAuthentication;public class Email_Autherticator extends Authenticator {  String username = "你郵箱的用戶名";  String password = "你郵箱的密碼";  public Email_Autherticator() { super();  }  public Email_Autherticator(String user,String pwd){ super(); username = user; password = pwd;  }  public PasswordAuthentication getPasswordAuthentication(){ return new PasswordAuthentication(username,password);  }}

import java.util.Date;import java.util.Properties;import javax.mail.Address;import javax.mail.Authenticator;import javax.mail.Message;import javax.mail.SendFailedException;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;public class Mail {  private String host = "smtp.126.com";  private String mail_head_name = "this is head of this mail";  private String mail_head_value = "this is head of this mail";  private String mail_to = "254173774@qq.com";  private String mail_from = "hackboyo@126.com";  private String mail_subject = "this is the subject of this test mail";  private String mail_body = "this is mail_body of this test mail";  private String personalName = "我的郵件";  public void sendMail() throws SendFailedException{ try {   Properties props = new Properties();//獲取系統(tǒng)環(huán)境   Authenticator auth = new Email_Autherticator();//進(jìn)行郵件服務(wù)用戶認(rèn)證   props.put("mail.smtp.host", host);   props.put("mail.smtp.auth", "true");   System.out.println(props);   Session session = Session.getDefaultInstance(props,auth);   //設(shè)置session,和郵件服務(wù)器進(jìn)行通訊   MimeMessage message = new MimeMessage(session);   message.setContent("Hello","text/plain");//設(shè)置郵件格式   message.setSubject(mail_subject);//設(shè)置郵件主題   message.setText(mail_body);//設(shè)置郵件內(nèi)容   message.setHeader(mail_head_name, mail_head_value);//設(shè)置郵件標(biāo)題   message.setSentDate(new Date());//設(shè)置郵件發(fā)送時(shí)期   Address address = new InternetAddress(mail_from,personalName);   message.setFrom(address);//設(shè)置郵件發(fā)送者的地址   Address toaddress = new InternetAddress(mail_to);//設(shè)置郵件接收者的地址   message.addRecipient(Message.RecipientType.TO,toaddress);   System.out.println(message);   Transport.send(message);   System.out.println("Send Mail Ok!"); } catch (Exception e) {   e.printStackTrace(); } //return flag;  }}

public class Test {  public static void main(String[] args) { Mail m = new Mail(); try {   m.sendMail(); } catch (Exception e) { }  }}