通过java代码发邮件

@Test
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("wj_leaf12345", "1qaz2wsx");
                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_leaf12345@126.com");
        mm1.setFrom(from);
        //第五步：设置收件人
        mm1.setRecipient(RecipientType.TO,new InternetAddress("wj_leaf12345@163.com"));
        mm1.setRecipient(RecipientType.CC, new InternetAddress("549051701@qq.com"));
        mm1.setRecipient(RecipientType.BCC, new InternetAddress("wj@itcast.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‘>传智</a>", "text/html;charset=UTF-8" );
        
        //第七步：
        Transport.send(mm1);

public class SendAttechmentDemo {
    @Test
    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("wj_leaf12345", "1qaz2wsx");
            }
        });
        s.setDebug(true);
        
        
        //声明MimeMessage
        MimeMessage msg = new MimeMessage(s);
        msg.setFrom(new InternetAddress("wj_leaf12345@163.com"));
        msg.setRecipient(RecipientType.TO, new InternetAddress("wj_leaf12345@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);
        
    }
}