java发送邮件示例讲解

 //对用户名和密码进行base64编码

 @Test

 public void base64(){
 String name = "wj_leaf12345";
 String pwd = "1qaz2wsx";
 BASE64Encoder en = new BASE64Encoder();
 name = en.encode(name.getBytes());
 pwd = en.encode(pwd.getBytes());
 System.err.println(name);
 System.err.println(pwd);

 }

public void sendMail() throws Exception{

 //第一步：声明properties对象放信息
 Properties prop = new Properties();
 //设置连接哪一台服务器
 prop.setProperty("mail.host","smtp.126.com");
 //设置是否验证
 prop.setProperty("mail.smtp.auth", "true");
 //第二步：声明用户名和密码
 Authenticator auth = new Authenticator() {
  //此访求返回用户和密码的对象
  public PasswordAuthentication getPasswordAuthentication() {
  PasswordAuthentication pa =
   new PasswordAuthentication("aaa", "sss");
  return pa;

  }

 };

 ////第二步：获取Session对象
 Session session =
  Session.getDefaultInstance(prop,auth);
 //设置session的调试模式
 session.setDebug(true);
 //第三步：声明信息
 MimeMessage mm1 =
  new MimeMessage(session);
 

 //第四步：设置发件人email
 Address from = new InternetAddress("wj@126.com");
 mm1.setFrom(from);
 //第五步：设置收件人
 mm1.setRecipient(RecipientType.TO,new InternetAddress("wj@163.com"));
 mm1.setRecipient(RecipientType.CC, new InternetAddress("554@qq.com"));
 mm1.setRecipient(RecipientType.BCC, new InternetAddress("wj@ss.cn"));
 //第六步：设置主题
 mm1.setSubject("这是用Java发的邮件3");
 mm1.setContent("你好，这是用java发的邮件,3333再试一下", "text/plain;charset=UTF-8");
 //第七步：
 Transport.send(mm1);

 }

 

mm1.setSubject("这是用Java发的邮件sfasdf3");

 mm1.setContent("你好，这是用java发的邮件,<a href='http://www.baidu.com'>百度</a>", "text/html;charset=UTF-8" );
 //第七步：

 Transport.send(mm1);

public void sendFile() throws Exception{

 Properties p = new Properties();
 p.setProperty("mail.host","smtp.163.com");
 p.setProperty("mail.smtp.auth","true");
 Session s = Session.getDefaultInstance(p,new Authenticator() {
  @Override
  public PasswordAuthentication getPasswordAuthentication() {
  return new PasswordAuthentication("ww", "123");

  }

 });

 s.setDebug(true); 
 //声明MimeMessage
 MimeMessage msg = new MimeMessage(s);
 msg.setFrom(new InternetAddress("ww@163.com"));
 msg.setRecipient(RecipientType.TO, new InternetAddress("ww@126.com"));
 msg.setSubject("图片的");
 //第一步：声明多处理的Part
 MimeMultipart mm = new MimeMultipart();
 //第二步：声明
 MimeBodyPart body1 = new MimeBodyPart();
 //第三步：设置符件
 DataSource ds = new FileDataSource(new File("./img/a.jpg"));
 DataHandler dh = new DataHandler(ds);
 body1.setDataHandler(dh);
 //必须要设置名称
 body1.setFileName(MimeUtility.encodeText("美女.jpg"));
 MimeBodyPart body2 = new MimeBodyPart();
 //第三步：设置符件
 DataSource ds2 = new FileDataSource(new File("./img/b.jpg"));
 DataHandler dh2 = new DataHandler(ds2);
 body2.setDataHandler(dh2);
 //必须要设置名称
 body2.setFileName(MimeUtility.encodeText("美女2.jpg"));
 MimeBodyPart body3 = new MimeBodyPart();
 //第三步：设置符件
 DataSource ds3 = new FileDataSource(new File("./img/m.mp3"));
 DataHandler dh3 = new DataHandler(ds3);
 body3.setDataHandler(dh3);
 //必须要设置名称
 body3.setFileName(MimeUtility.encodeText("世纪末.mp3"));
 //将body1添加到mm
 mm.addBodyPart(body1);
 mm.addBodyPart(body2);
 mm.addBodyPart(body3);
 msg.setContent(mm);
 //发送
 Transport.send(msg);

 }