java实现邮件发送

 //创建一个配置文件并保存
        Properties properties = new Properties();
        properties.setProperty("mail.host","smtp.qq.com");
        properties.setProperty("mail.transport.protocol","smtp");
        properties.setProperty("mail.smtp.auth","true");

        //QQ存在一个特性设置SSL加密
        MailSSLSocketFactory sf = new MailSSLSocketFactory();
        sf.setTrustAllHosts(true);
        properties.put("mail.smtp.ssl.enable", "true");
        properties.put("mail.smtp.ssl.socketFactory", sf);

        //创建一个session对象
        Session session = Session.getDefaultInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("503043053@qq.com","xqalcxlrurfbbgdg");
            }
        });

        //开启debug模式
        session.setDebug(true);

        //获取连接对象
        Transport transport = session.getTransport();

        //连接服务器
        transport.connect("smtp.qq.com","503043053@qq.com","xqalcxlrurfbbgdg");

        //创建邮件对象
        MimeMessage mimeMessage = new MimeMessage(session);

        //邮件发送人
        mimeMessage.setFrom(new InternetAddress("503043053@qq.com"));

        //邮件接收人
        mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress("a8886762@gmail.com"));
//#region 简单内容
//        //邮件标题
//        mimeMessage.setSubject("Hello Mail");
//
//        //邮件内容
//        mimeMessage.setContent("我的想法是把代码放进一个循环里","text/html;charset=UTF-8");
//#endregion
        //邮件内容
        //准备图片数据
        MimeBodyPart image = new MimeBodyPart();
        DataHandler handler = new DataHandler(new FileDataSource("D:\4_STUDY\JAVA\mavenmodule02\test01\src\main\java\com\doubleh\email\java学习路线图.jpg"));
        image.setDataHandler(handler);
        image.setContentID("test.png"); //设置图片id

        //准备文本
        MimeBodyPart text = new MimeBodyPart();
        text.setContent("这是一段文本<img src='cid:test.png'>","text/html;charset=utf-8");

        //附件
        MimeBodyPart appendix = new MimeBodyPart();
        appendix.setDataHandler(new DataHandler(new FileDataSource("D:\4_STUDY\JAVA\mavenmodule02\test01\src\main\java\com\doubleh\email\新建 DOC 文档.doc")));
        appendix.setFileName("test.doc");

        //拼装邮件正文
        MimeMultipart mimeMultipart = new MimeMultipart();
        mimeMultipart.addBodyPart(image);
        mimeMultipart.addBodyPart(text);
        mimeMultipart.setSubType("related");//文本和图片内嵌成功

        //将拼装好的正文内容设置为主体
        MimeBodyPart contentText = new MimeBodyPart();
        contentText.setContent(mimeMultipart);

        //拼接附件
        MimeMultipart allFile = new MimeMultipart();
        allFile.addBodyPart(appendix);//附件
        allFile.addBodyPart(contentText);//正文
        allFile.setSubType("mixed"); //正文和附件都存在邮件中，所有类型设置为mixed


        //放到Message消息中
        mimeMessage.setContent(allFile);
        mimeMessage.saveChanges();//保存修改

        //发送邮件
        transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());

        //关闭连接
        transport.close();