javaMail发送邮件

用java发邮件，必须要导入新的包

       mail.jar – 发邮件的核心包

       activation.jar – 对用户和密码加密.

在mail.jar中有三个核心类：

       Javax.mail.Session – 是指与邮件服务器会话。整个项目中只要一个就可以了.

       Javax.mail.Message（接口）  - 准备发送数据信息。

                      MimeMessage － 可以设置类型的数据信息。

       Transport – 它拥有一个方法可以发送Message。

@Test
  public  void sendMail() throws Exception{
    //1,声明properties对象放信息
    Properties props = new Properties();
    //设置连接哪一台服务器
    props.setProperty("mail.host", "smtp.163.com");
    //设置是否认证：
    props.setProperty("mail.smtp.auth", "true");
    
    //2，声明用户名和密码
    Authenticator auth = new Authenticator(){
      //返回用户名和密码对象
      @Override
      protected PasswordAuthentication getPasswordAuthentication() {
        PasswordAuthentication pa = new PasswordAuthentication("xxxxx@163.com", "123456");
        return pa;
      }
    };
    //3,获取session对象
    Session session = Session.getDefaultInstance(props, auth);
    //设置session为调试模式
    session.setDebug(true);
    //4,声明信息
    MimeMessage mm1 = new MimeMessage(session);
    //5,设置发件人信息
    Address form = new InternetAddress("xxxxx@163.com"); 
    mm1.setFrom(form);
    //6,设置收件人 ,RecipientType:发送，抄送，密送  类型
    mm1.setRecipient(RecipientType.TO, new InternetAddress("xxx@qq.com"));
    //mm1.setRecipient(RecipientType.CC, new InternetAddress(""));//抄送
 
    //7，设置主题
    mm1.setSubject("拉面学习通知");
    String cont = "请点击 <a href='http://www.fsy158.com/news/31_207'>官网新闻</a>查看祝您发财";
    mm1.setContent(cont, "text/html;charset=UTF-8");
    
    //8，发送
    Transport.send(mm1);
  
  }

其中的mimeType可是text/plain纯文本。

发送附件：

@Test
  public  void sendMailWithFile() throws Exception{
    Properties ps = new Properties();
    ps.setProperty("mail.host", "smtp.163.com");
    ps.setProperty("mail.smtp.auth", "true");
    
    Authenticator auth = new Authenticator(){
      @Override
      protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication("xxx@163.com","xxx.");
      }  
    };
    Session session = Session.getDefaultInstance(ps, auth);
    session.setDebug(true);
    MimeMessage msg = new MimeMessage(session);
    Address address = new InternetAddress("xxx@163.com");
    msg.setFrom(address);
    //发送给
    msg.setRecipient(RecipientType.TO, new InternetAddress("xxx@qq.com"));
    msg.setRecipient(RecipientType.BCC, new InternetAddress("xxx@qq.com"));//密送
    msg.setRecipient(RecipientType.CC, new InternetAddress("xxx@qq.com"));//抄送
    msg.setSubject("$激情小视频*免费观看");
    
    //声明多部件处理
    MimeMultipart mm = new MimeMultipart();
    
    MimeBodyPart body1 = new MimeBodyPart();
    //设置附件
    DataSource ds1 = new FileDataSource(new File("./img/a.jpg"));
    DataHandler dh1 = new DataHandler(ds1);
    body1.setDataHandler(dh1);
    //必须设置名称
    body1.setFileName(MimeUtility.encodeText("美女.jpg"));
    
    MimeBodyPart body2 = new MimeBodyPart();
    DataSource ds2 = new FileDataSource(new File("./img/b.jpg"));
    DataHandler dh2 = new DataHandler(ds2);
    body2.setDataHandler(dh2);
    body2.setFileName(MimeUtility.encodeText("美女2.jpg"));
    
    MimeBodyPart body3 = new MimeBodyPart();
    DataSource ds3 = new FileDataSource(new File("./img/m.mp3"));
    DataHandler dh3 = new DataHandler(ds3);
    body3.setDataHandler(dh3);
    body3.setFileName(MimeUtility.encodeText("小电影.mp3"));

    //添加body到mm
    mm.addBodyPart(body1);
    mm.addBodyPart(body2);
    mm.addBodyPart(body3);
    
    msg.setContent(mm);

    //设置发送日期
    Calendar c = Calendar.getInstance();
    c.add(Calendar.DATE, -5);
    msg.setSentDate(c.getTime());

    //发送
    Transport.send(msg);
  }
  

可以继续添加MimeBodyPart 来设置正文

MimeBodyPart htmlPart = new MimeBodyPart();
String cont = "请点击 <a href='http://www.fsy158.com/news/31_207'>官网新闻</a>查看祝您发财";
htmlPart.setContent(cont, "text/html;charset=UTF-8");

mm.addBodyPart(htmlPart);